Maestro Release Notes

Please consult the Release Notes each time that you install a new release of Maestro, to get a summary of the changes and improvements that have been made.

MAESTRO is a finite element analysis program for rationally-based analysis, evaluation, and structural optimization of ships, offshore structures, and other large complex thin-walled structures.

MAESTRO Requirements

· Operating Systems not tested: Windows 7, Windows XP 64-bit, 2000

· Operating Systems not supported: Windows ME, 98, 95, NT

· Mac: The Intel Mac with Bootcamp or Parallels has not been tested

· Microsoft .NET Framework 2.0.

· Valid license (without this, MAESTRO will operate in the demonstration mode)

MAESTRO 9.0.8

New and Enhanced Features:

• Sparse Out-Of-Core (OOC) Solver: Added Sparse Out-Of-Core (OOC) solver that can solve very large models. The limitation of the solver is based on the computer’s hard disk space. Models up to 700,000 degrees of freedom have been tested.
  
  
• Inertia Balance: Added automated inertia balancing for models having hydrostatic loading. Previously, automated inertia balance was only available for models not having hydrostatic loading. The details of the load balance methodology are available under Load Balance in the Verification and Validation section of the manual.
  
  
• Longitudinal Bending Moments: Axial forces for longitudinal bending moment calculations are now included. Previously, the bending moment distribution was based on the classical beam theory, where the contributions from axial forces were ignored. In some cases, this resulted in bending moment distributions that did not close at the ends. This only affects the bending moment distribution plot and does not change the model’s loads; therefore, this will not change previous model response results. The details of the longitudinal bending moment calculations are available under Load Balance in the Verification and Validation section of the manual.
  
  
• Bending Moment/Shear Plots: Bending moment and shear force are now plotted at the base line. Previously, these plots were located at the waterline.
  
  
• Load Balancing Verification Documentation: An extensive explanation and verification of the load balancing methodology is presented in the Help file

Bug Fixes:

• Legacy Solver: Fixed a few synchronization bugs for the legacy solver.
  
  
• Load Creation: Fixed a bug related to the numbering of load cases. If the user only had two load cases, ID 2 and ID 3, but missing ID 1, a third load case could not be created unless ID 3 was renumber to 1 or 4.
  
  
• Fine Mesh Models and Corrosion: Fixed a bug when solving un-corroded fine mesh models of a corroded global model.
  
  
•  ALPS/HULL: Fixed a bug that did not allow the user to execute an ALPS/HULL analysis a second time in a given session.
  
  
• RSpline: Fixed an RSpline display bug that caused computer crashing when creating/deleting RSplines

Graphical Bugs Fixed:

•  Stress Reporting: A bug when reporting stress for transversely stiffened elements.
  
  
• Group View Deformation: Deformation plots when viewing groups were not correct.
  
  
•  Adequacy Plots: Fixed a bug when displaying adequacy parameters of irregular evaluation patches.

Known Issues:

• Cutting Planes: Cutting planes deleted when user chooses View/Refresh.
  
  
• Network Licenses: We are actively working with SafeNet to resolve inconsistent behavior in some network installations as it relates to hardware lock access.
  
  
• Desktop Shortcut: In some installations cases, the desktop shortcut does not work. The user has to change the link to properly find C:\Program Files\MAESTRO\System\modeler91.exe
  
  
• Quick Create: The creation of additional nodes via Quick Create fails on the first attempt in some cases.
  
  
• Color Legend: In some plotting scenarios, the titles and/or values are cutoff. The user can use the View/Options to change the font if necessary.
  
  
• Default Material: The default material property is deleted when the user creates a new model (via the File/New menu item) in one running instance of MAESTRO.
  
  
• View Refresh: In plotting different views, MAESTRO will hang on the current view. In most cases this can be resolved by the user choosing View/Element Type followed by View/Refresh.
  
  
• Section Properties Report: The header of the Hull Section Properties report is lost when pasting the grid into MS Excel. The user can get around this by:
• Right-click and select Change fixed rows
• Change the fixed row from “1” to “0” and the fixed row will become white
• Highlight the desired rows; copy then paste into MS Excel
  
  
• Cylindrical Coordinates: The cylindrical coordinates were intended for purposes of inputting the data but not modifying existing Endpoints/Additional Nodes.
  
  
• Dynamic Pan: When using the mouse to dynamically pan a model, the graphics freezes until the user releases the mouse, at which time the graphics update.

MAESTRO 9.0.7

New and Enhanced Features:

·   Layout Organization: Many of the menu items and icons have been reorganized, renamed or changed to provide the user with a more consistent and effortless experience.  Please see the documentation for a complete description of menus and icons.

·   RBE3: A new element, RBE3 has been added to MAESTRO.  The intended use of the RBE3 is to transmit forces and moments from a primary node to one or more secondary nodes without adding any stiffness to the structure.

·   Transverse Bending Moments: A newly designed Hull Menu includes options to view transverse plots of bending moments.  This is especially useful when designing multi-hulls.

·   Transparency: This new feature allows the user to choose to set a module or substructure as transparent for easier viewing of the model.

·   Groups Creation/Operation: New functionality has been added to allow a user to create a new group from existing groups using the Group Operation dialog.  Also, a new feature has been added within the groups dialog to add additional elements that are similar to an already selected element.  Combined, these features provide the user with a more robust way to create groups.

·   Wetted Group: To assist in exporting “wetted” elements to FEMAP, new functionality in the Groups menu was added that will automatically create a general group of "wetted" elements.

·   Select by Box: To expedite the selection of elements, a select-by-box capability has been added.

·   Directional Stress: A new feature has been added which allows the user to align all element local stress vectors to a global direction.  This functionality will enable the presentation of stress in a uniform manner to the analyst can better assess the stress patch in a given direction.

·   Export Stiffness Matrix: MAESTRO can now export the stiffness matrix in Nastran format through the export Nastran options.  This feature will allow advanced users to process analysis runs in Nastran by using the MAESTRO generated stiffness matrix.

·   Batch Execution: MAESTRO has the ability to perform batch processing, which allows the user to sequentially solve any number of models, each of which may have any number of load cases without having to manually launch each model.

·   AutoSave: A new auto save feature has been added to MAESTRO.  The user can select the number of executed commands in between auto saves from File > AutoSave Frequency...

·   Recover Model: A new feature has been added under File > Recover, which automatically recovers a model after an unexpected closing of MAESTRO.

·   Documentation: The documentation has been completely overhauled with a focus more on “how to.”  Additionally, all of the documentation is now in a single location, which can be found via the Help menu or help icon.

·   Sentinel Security Drivers/Servers: The Sentinel System Driver (both for USB) and Sentinel Protection Server (for Network locks) are now integrated into the MAESTRO installation process.  Therefore, there is no need for the user to install security drivers/servers separately.  The integrated installation checks to determine the necessity of installing the Sentinel Driver/Sentinel Protection Server.

·   Help Menu: The new Help menu now includes links to the website, forum, support email, and FAQ.

·   FAQ: Updated FAQ section in the help file and on the website.

·   "Null" Beam and Stiffener Properties: There are now predefined "null" beam and stiffener layouts when creating a new model.  This eliminates the need to define these for an unstiffened panel or unframed strake.

·   Set Current & View Part: There is now an icon  and a right-click menu option in the parts tree to set the current and view part for a module or substructure at the same time.  There is also a new icon to set current part  and set view part .

·   Background Color: The new MAESTRO default background color is light gray with gradient north.  To change back to a black background, or another color, open the Preferences dialog from File > Preferences.

·   Capture View: A new feature has been added under the File menu which allows the user to copy a screenshot of the modeling space to their clipboard which can then be pasted into another program.

·   Importing Legacy Results: A new mechanism has been added to facilitate the importing, i.e. opening *.PLG files, of legacy MAESTRO results.

·   Hull Menu: A newly designed Hull Menu with options to view horizontal and transverse plots.

·   Solving Fine Mesh Models: Multiple top down Fine Mesh models can be solved at once from the File > Analysis/Evaluation menu or Analysis/Evaluation dialog.

·   Groups: A new feature has been added within the groups dialog to add additional elements that are similar to an already selected element.

·   Check & Merge Dialog:  The functionality found in the Check & Merge Dialog (namely Update: FE Tags, Free Edges and Evaluation Patches) has been moved to the Tools > Renumber FE-Tag, View > Edges > Free Edges and Model > Evaluation Patch > Auto-Generate menu items respectively.

·   Model Summary:  Functionality used to report number of elements and nodes has been moved to the Model > Summary menu item.

Bug Fixes:

·   Update FE Tags: Fixed a bug so that FE Tags are updated when a module or substructure is moved or rotated.

·   Collapsed Quad: Fixed a bug so that a quad collapsed to a triangular element correctly distributes mass and force to the appropriate nodes.

·   Sort Volume Table: Fixed a bug so the Volume Table can now be sorted by the Volume Group Name.

·   Deletions Dialog: Fixed a bug that would cause a hard crash when deleting large amounts of elements from the deletions dialog.

·   Sort Element List by ID: Fixed a bug that allows elements to be sorted in the Grid tab without information disappearing.

·   Sort Nodes List by ID: Fixed a bug that caused a hard crash when trying to sorted listed nodes by ID in Grid tab.

·   Warped Quad: Fixed a bug to take the average face normal of the two triangles making up a warped quad for area, weight, volume, etc. calculations.

·   Trochoidal Wave: Fixed a bug so that the trochoidal wave profile definition now uses the formulas provided in DDS-100-6 i.2.

·   Parts Tree in Parts Dialog: Fixed a bug so that the parts tree within the Modules and Substructures dialog is consistent with the main parts tree.

·   Brackets: Fixed a bug so that leg lengths are automatically populated for the listed property, and are returned to the automatic lengths if “user defined” is unchecked.

·   Find FE-Tag: Fixed a bug so a search can now be performed for a nodal or elemental FE-Tag.

·   Deletions Filters: Fixed a bug so that the filters in the deletions dialog work as expected.

·   Saving/Loading Results: Fixed a bug so results consistently save and load with a .mdl file.

·   ULSAP Results: Fixed a bug so that ULSAP results are automatically saved and loaded with a .mdl file.

·   ULSAP Adequacy Parameters: Fixed a bug so only ULSAP Adequacy parameters are shown in an ULSAP analysis.

 Graphical Bugs Fixed: 

·   "Show This Thickness Only": Fixed a bug that allows user to switch back to all "thicknesses" using the dynamic query once the "Show this thickness only" option is selected.

·   Corner Stress: Fixed a bug so now the check box for "Corner Stress" changes the stress contour plot between nodal and elemental contour plots.

·   Compound Element Effectiveness: Fixed a bug so now non-transverse compound elements can be defined as longitudinally effective using the dynamic query.

·   Bending Moment when Switching Load Cases: Fixed a bug so the hull bending moment plot updates when different load cases are selected.

·   Load Case Selection: Fixed a bug to make sure queried loads are consistent with the load case from the load case selection drop-down menu.

·   Pressure Plots when Switching Load Cases: Fixed a bug so the color plot and legend updates each time a different load case is selected from the load case drop-down menu.

·   Deformed Model Changes: Fixed a bug that prevented model from being undeformed if structure was changed in the "deformed" mode.

·   Contour Stress Plot: Fixed a bug so that the stress legend updates correctly between load cases when viewing a contoured stress plot.

·   Hide Elements Outside Range: Fixed a bug that now has Hide Elements Outside Range icon  functionally properly.  This option will now hide elements that are not within the range of displayed values.

·   Stiffeners on Wetted Elements View: Fixed a bug so that when stiffeners are turned on, they remain in view on the wetted elements when selecting View > Wetted Elements.

·   Mirrored Wetted Elements: Fixed a bug so the wetted faces of wetted elements in a mirrored module or substructure are shown correct graphically.

·   Adequacy “User Defined” Range Plot: Fixed a bug so results update correctly when switching between load cases.

MAESTRO 8.9.0

·       Persist model Fe tags. In previous versions, any destructive operations, such as adding, deleting and modifying elements or nodes, would trig the modeler to renumber model internal Fe tags. From version 8.9.0 and beyond, the Fe tags will not be renumbered unless users specify. This feature is useful when you wish to interface Masetro to a third party software.

·       To force the model renumbering all Fe tags, click Model->Integrity Check->Renumber Fetag. In previous versions, this function was done by using dialog “Check & Merge”.

·       The update fetag function in dialog “Check & Merge” will not renumber any existing fetags, but will assign new fetags for new elements.

·       Reaction forces are stored into result files. To list the reaction forces of a load case, click Result->Reaction forces. The reaction forces are streamed out into the output pane.

·       Expose result file (*.rlt) through COM interfaces. Two samples, one written in C#, one written in VC++6, are given in “C:/Program Files/DRS C3 /Maestro/Samples/ReadResult”. 

·       Export the inertias of total model mass matrix Ixx, Ixy, Ixz, Iyy, Iyz and Izz. To list the model inertias, click Load->View floating center, CG. The inertias are streamed out into output pane.

·       Expand the wetted surface file information. The new wetted surface file includes element CG and normal vector of wetted surface of external hull, as well as internal tanks.

·       Add a feature to save and load named views. To add a named view, click View->Options…, to launch View Options dialog, enter a unique name in the combo box of the “User-Define-Named View Angles” frame, click button Add/Modify. To view a named view, open the View Options dialog, select the desired named view from the combo box of the “User-Define-Named View Angles” frame, click button OK.

·       Modify the mass distribution of “Mass Per Length” pattern. In previous version, the mass is scaled to the elements of the section based on the percentage of the element self-weight, which is similar to load pattern “Scale Module Mass”. In version 8.9.0, the mass is evenly distributed to the two ends of the section.

·       Fixed a bug related to volume mass loading. The bug caused inaccurate volume calculation when the tank mass was too small.

·       Fixed a bug related to corrosion analysis. In previous versions, the non-corroded load cases have to be preceded to the corrosion load cases.

MAESTRO 8.8.0

·       Allow to place an edge stiffener on either edge 1 or edge 2. In previous versions, edge stiffener 2 can only be placed if edge stiffener 1 is selected. The assumption was valid for MAESTRO coarse mesh analysis since the edge stiffener was eventually smeared into the plate stiffness. It made no difference for the coarse analysis whether the stiffener was on edge 1 or edge 2. However, once you wish to convert the MAESTRO model to a Nastran model, or refine the coarse mesh model to a finer mesh model, the location of the edge stiffener becomes important.

·       Export the wetted surface file with sequential nodal and element IDs.

·       Add a feature to view the pressure side of wetted elements. (Use the combination of View-> Element Wetted and View->Plate->Element Pressure Side).

·       Add a feature to automatically check possible free edge errors.

·       Add a function to check volume group (and other types of groups) holes and internal elements (Expand group tree, right mouse click and select Free Edges)

·       Automatically adjust the density of a volume group if the tank is overflowed.

·       Add a “strake panel to additional panel conversion” icon in fine mesh toolbar. To convert a strake panel to an additional panel, first activate the conversion function (make the conversion icon sink), then double click the selected strake panel.

·       Add a function of “Show this thickness only”. Use the following steps for this feature,

1.      View->Element Type

2.      Activate tooltip icon.

3.      Move the mouse to the desired element.

4.      Right mouse click, select “Show this thickness Only”.

5.      Click View->Element Type to deactivate this view.

·       Add a function of “Show this stiffener type only”. Use the following steps for this feature,

1.      View->Element Type

2.      Activate tooltip icon.

3.      Move the mouse to the desired element.

4.      Right mouse click, select “Show this stiffener type Only”.

5.      Click View->Element Type to deactivate this view.

MAESTRO 8.7.8

·       Add an iterative solver for solving large models. MAESTRO sparse direct solver uses Intel's Math Kernel Library (MKL) version 8.1.1. Currently Intel's MKL sparse solver is limited to about 250,000 unknowns.  The iterative solver can be used for large model static analysis. Note that the iterative solver should only be used if the sparse direct solver fails.

·       Include Sentinel Driver 7.3.0.

·       Use .Net 2005 and Intel Fortran 9.1.029 to build MAESTRO COM solver.

MAESTRO 8.7.7

·       Streamline and correct MAESTRO evaluation component automation data. In previous versions, the input data for MAESTRO evaluation component, such as panel pressure, stresses, plate thickness and stiffener scantlings, are the average quantities over the corresponding patch. Since Evaluating PCSB (Panel Collapse Stiffener Buckling), PFLB (Panel Failure Local Buckling) and PSPB (Panel Serviceability Plate Bending) does not require to use the width of the grillage (or patch), it is more appropriate to evaluate these failure modes at the element level rather than the patch level, assuming the stiffener length is correctly obtained from the corresponding patch. This change is in-line with the strake concept of the traditional MAESTRO Solver. With this change, it is expected that the adequacy parameters obtained from MAESTRO COM Solver are in reasonable agreement with what obtained from the traditional MAESTRO Solver.

·       ALPS/ULSAP and ALPS/HULL updates

·       Automatically perform model integrity check for part copying, mirroring and deleting operation. In previous versions, users have to manually update the model by clicking Model->Integrity Check->Check & Merge.

·       Allow selecting full module for corrosion group.

·       Add “Net Corroded” method for corrosion feature.

·       Add a feature to automatically define a group of beams as an evaluation beam (“patch”) when applicable. In previous version, beam is evaluated as a single element, which under-estimates beam's length in some cases.

·       Fixed beam tripping (frame and girder) error of MAESTRO evaluation component. The error under-estimates (on the safe side) beam's tripping strength.

·       Fixed an error of ALPS/ULSAP beam evaluation component.

·       One button click to balance all load cases with end moments

MAESTRO™ 8.7.6.

MAESTRO™ 8.7.5.

·       Fixed a volume pressure related bug. The bug only affected at panel evaluation level, where a tank panel is subject pressure on both side.

·       Include MAESTRO quick start guide file.

·       Update ALPS/HULL to version 2006.1.

·       Added a feature to input point force/mass for module group and plate group. Modeler will evenly distribute the lump force and mass to all nodes of the group.

·       Added a feature to input constraints for module group and plate group. Modeler will assign the constraint to all nodes of the group.

·       Added a feature to export hull girder properties to a Microsoft Excel spreadsheet.  These properties include include gross weight, buoyancy, vertical shear force and vertical bending moment.  Also, the user can now export finite element results to a Microsoft Excel spreadsheet.  This new feature can be found under the Results menu.

·       Added a feature to synchronize/update group mass for module group, plate group and bayset in load case definition dialog.  This feature allows the user to change the mass in a module/plate/bayset group and have MAESTRO synchronize this at the load case level.  Previously the user would have to update each load case individually but now the user has the ability to synchronize this for a particular load case or all load cases.

·       The user can now merge a fine mesh model (from a top down analysis) with a global model while preserving the RSpline definition.  Previously MAESTRO would automatically delete the RSpline elements associated with the fine mesh model.

·       Added a "CK OverFill" button to check if the user has overfilled a tank.

·       When a user has defined a Centerline Group and clicks Modify, a message will remind the user to enter half tank mass (height and fraction are irrelevant).

·       Fixed a bug introduced in version 8.7.4, where an attempt was made to properly update beams with attached plate in compounds. While the compound update bug was fixed, it caused a new problem to modify strake (a special compound).

·       Fixed a bug related to the tank mass loading pattern.

·       Fixed a bug of importing Nastran plate offsets.

·       Fixed a bug of importing Nastran bar inertia properties.

·       Fixed a bug related to the Surface Head loading pattern.

·       Fixed the behavior of the Groups dialog regarding the naming of groups.

MAESTRO™ 8.7.4.

·       ALPS/ULSAP module buckling algorithm update for bulb-flat shape stiffeners.

·       Display Adequacy Parameters in element result grid.

·       Update legend when user-defined range is selected.

·       Add hull girder cross section shear areas on Hull Property Grid Page (“Hull->Show Properties”).

·       Add Result Text output (“Result->Text Output”).

·       Output both volume weight and bayset weight on weight summary (“Hull->Weight Summary”).

·       Allow long name for substructure and module in Module Dialog Box.

·       Output Hull girder properties (Weight, Bending Moment, Shear Force, etc) to Excel spreadsheet.

·       Additional Parameters for importing 3^rd party pressure loads

o      Acceleration Reference Coordinate System (optional): Item #7 in the “acceleration” line. A “W” indicates accelerations are measured in world coordinate system, and a “S” or none (default) indicates accelerations are measured in ship coordinate system.

o      Rotational Reference Point (CF, optional): Items #7, #8 and #9 in the “displacement” line. The ship’s floating position is defined by rotational angles (pitch, roll and yaw) and the rotational reference point. Structure CG is used if the rotational reference point is not specified.

o      The unit of rotational angles is degree, and the unit of rotational acceleration is rad/s^2.

o      To review the floating position, launch the load dialog, click “Non-float” button.

o      The ship rotational center (reference point of the accelerations) can be defined in the acceleration page. The default rotational center is structure’s CG.

MAESTRO™ 8.7.3.

·       Modeler/COM Solver bay set loading enhancement/modification

o      Change “Direction and Connection Type” to “X+, X-, Y+, Y-, Z+ and Z-” in Bay Set Group dialog.

o      Check and calculate XCG and ZCG of a bay set. Only YCG is a required input.

o      Check if a bay set is tipped over. (Under Mass Bay Set tab of the Load Dialog, Click “CK Tip Over” button).

o      Equivalent load verification (Load->View Total Point Force)

o      Sample bay set input data. (BayAcceleration.mdl, BayBalance.mdl)

·       Importing 3^rd party pressure loads into Modeler

o      Data is in SI (N-M) units

o      Export MAESTRO model wetted surface (File->Export->Wetted Surface)

o      Importing wetted surface nodal pressure

§        Keywords: loadcase, acceleration, displacement and pressure

§        Data example:

o      Import wetted surface element pressure

§        Keywords: loadcase, acceleration, displacement and elmpressure

§        Data example:

o      Adjust accelerations to balance the model (optional, Click Balance Icon).

·       Allow long name for dxf and idf files.

·       Fixed an ANSYS translation bug.

·       Stop supporting “Structure Symmetric and Load Asymmetric” feature of MAESTRO Scalable Solver. Full model should be used if the load is asymmetric.

·       Align element local axis when split a quad into 4 quads.

·       Align triangle element local axis when mirroring.

MAESTRO™ 8.7.2

·       Fixed a bug in MAESTRO security module.

·       Bracket Element in Compound.

·       Fixed a bug updating ULSAP impact pressure data.

MAESTRO™ 8.7.1

·       Bracket Element

·       Present stress result of each loading step for ALPS/HULL.

·       Fixed a few fine-mesh top-down Nastran translation bugs.

MAESTRO™ 8.7.0

·       Run failure mode evaluation directly through Modeler/COM Solver

·       Traditional MAESTRO Evaluation

·       How to use evaluation patches(Q/A)?

·       Ultimate Limit Strength Assessment Program (ULSAP) now available from within MAESTRO (note that ULSAP is an optional module that may be purchased)

·       ULSAP Tutorial

1.     Run ULSAP without Geometric Model

a)    Lesson 1, Open Sample Model (Sample)

b)    Lesson 2, Create from Scratch

2.     Run ULSAP (or MAESTRO) with Geometric Model

·       ULSAP Evaluation Theoretical Manual

·       Ultimate Limit State Assessment Program

·       Comparison of ULSAP, DNV PULS and FEA(ANSYS)

·       ULSAP Comparison data model

1.     ULSAPVerificationTable1.mdl

2.     ULSAPVerificationTable2.mdl

3.     ULSAPVerificationTable3a.mdl

4.     ULSAPVerificationTable3b.mdl

·        (ULSAP) benchmarks (un-stiffened panels, stiffened panels 1, stiffened panels 2)

·       Run hull girder ultimate strength (ALPS/HULL) directly through Modeler

·       How to …

·       Benchmarks

·       ALPS/HULL Reference

·       Fast Sparse Matrix Solver, Edition

·       MAESTRO has incorporated Intel’s PARDISO Sparse matrix solver as an alternative matrix solution. The solver is at least 2 or 3 times faster than the traditional skyline method, and is free for the current users.

·       Still-Water Intact Stability(Beta)

·       Transverse and Longitudinal Metacenter, Righting Lever GZ.

·       Righting Arms table (Hull->Stability->Righting Arms)

·       Cross Curves table (Hull->Stability->Cross Curves)

·       Buoyancy center.

·       MAESTRO Quick Start Guide

·       Other improvements and bug fixes

·       Default volume calculation is now the new “Open-top volume component”.

·       Improved floating center calculation

·       Fixed a bug of oblique wave balancing

·       Fixed a bug of displaying open-top tank pressure

·       Default nodal joint tolerance is changed from 0.1mm to 1mm

·       The modeler’s default additional acceleration vector is changed from world coordinate system to the structural (ship) coordinate system. It is now consistent with Maestro Scalable Solver.

·       Additional acceleration vector in world coordinate system is available in Modeler. Please note that Maestro Scalable Solver does not support this feature.

·       Modeler Pressure Load Pattern illustration

·       Relative wave Heading definition, Hydrostatic Balance Verification

·       Define wave profile width. Open view options… dialog, while the water plane checkbox is on, change Wave Width.

·       Plot the normal of the mean water plane (ocean surface) when viewing CF is selected.

·       Plot wave direction if the wave is oblique.

·       View largest beam stress (Result->Stress->Beam->Flange Max)

·       Scalable Solver Optimization Example/Tutorial

·       Use deletion dialog to re-organize the “deleted elements” into a new module. Note that the strake elements will be converted to additional quads and additional beams.

·       Allow user to re-balance a load case without modifying the load.

·       Use hydrostatic balance dialog to balance all load cases.

·       Add laminate allowable interlaminar shear stress.

·       Display stress ratio of laminate plate.

·       Allow line pressure for strake frames and girders.

MAESTRO™ 8.6.3 (Security Note)

·       When creating elements, the “focus” now moves automatically to the Node 1 field just after the user clicks the ID button. (Clicking the ID button is the first step in creating a new element)

·       Retain the Legend parameters, as defined by the user, when plotting various results.  These options are set in the Options, which is accessed via the View menu.

·       OpenGL vs. Microsoft Windows Driver – MAESTRO automatically sets the corresponding Rendering Options when the user selects either OpenGL or Microsoft Windows video driver.  The video drivers are accessed through the Advanced button, which is found in the view options.

·       An open volume component is now complete, allowing the definition of open tanks.  This optional component is available via the File/Preferences menu item.

·       The Restraint menu's name has changed to Constraint

·       The Constraint menu can now be accessed using the ALT+c key combination.

·       The Result menu can now be accessed using the ALT+r key combination.

·       Fixed a bug when executing the Load/View Mass/Module command.

·       Fixed a bug when executing the Load/View Mass/Volume command.

·       Fixed a bug related to scaling markers, when viewing the nodes in a model.

·       Fixed a graphics related bug when changing constraint definition via dynamic query.

·       Fixed a bug related to displaying volume pressures.

·       Trochoidal wave is included in the wave profile (Modeler/COM Solver only).  This option is found under the Balance tab when analyzing a floating structure.

·       Froude-Krylov correction can be switched off (Modeler/COM Solver only).  This option is found under the Balance tab when analyzing a floating structure

MAESTRO 8.6.2 (Security Note)

·       Retain the current stress viewing mode when changing to a new load case.

·       Fixed a native Maestro data file translation bug when strake girders and frames are not in the same side.

·       Fixed a bug in the COM solver when a rotated module has spring elements.

·       Ultimate Limit State Assessment Program (ULSAP) benchmarks (un-stiffened panels, stiffened panels 1, stiffened panels 2)

·       Access ULSAP evaluation module

·       Calculate hull girder cross sectional properties Ixx, Iyy and A for mixed materials.

·       When viewing wetted elements, the outlines of the non-wetted elements are turned off

• Add the following shortcut keys:

ctrl + n  =  Endpoints and Additional Nodes dialogue

ctrl + e  =  Finite Element dialogue

ctrl + k  =  Strake dialogue

ctrl + d  =  Deletion dialogue

ctrl + g  =  Groups dialogue

ctrl + r   =  Restraints dialogue

ctrl + l   =  Loads dialogue

·       Auto-save a backup mdl file (*.bck)

·       Directional Stress (Material Axis)

·       Auto define wetted element group Model->Group->Create Wet group (under general group folder)

·       Wet/unwet group elements

·       Copy compound element

·       Identify node by FeTag, Model->Integrity Check->Find FeTag

·       Option to display contour nodal stress

·       Option to use open-top tank module, File->Preference->Use New Volume Component

·       Export new XML format

·       Solve model with XML data and store result in XML file

·       Fixed a bug when mirroring structure with cylindrical coordinate.

·       Allow user to define frequency viewing range

·       Add Subspace method for modal analysis

·       Corrosion group can be added into a load case

MAESTRO NEW SECURITY

MAESTRO has implemented a new security scheme that will require existing users to contact DRS C3.  Existing users will have to use the FastLock-MAESTRO utility (Start/Programs/MAESTRO) to reprogram their security device.  For further information regarding the FastLock-MAESTRO utility, please see MAESTRO Help (Start/Programs/MAESTRO)

MAESTRO 8.6.0

ADDITIONAL FEATURES

Composite Elements

Graphics

Other New Functionality

CORRECTIONS/CHANGES

Maestro 8.5.1
ADDITIONAL OPTIONAL MODULES

• Fine Mesh Analysis (FA)

  An optional fine-mesh analysis module has been added to the MAESTRO interface. The PFA feature offers two options to meet your fine-mesh analysis needs: Top-down and Embedded.

  The Top-down option is a two-step analysis that creates a separate fine-mesh model with imposed boundary displacements via the MAESTRO global coarse mesh results. This feature offers the same logic as MG/DSA without leaving the MAESTRO graphical user interface. The user can create multiple fine-mesh models within one global model, allowing the user to review design-change decisions without re-loading other models.

  The Embedded option is a one-step analysis the “embeds” the fine-mesh model into the coarse-mesh model via rigged spline connections. During this process the “master elements” are deleted and replaced with a fine-mesh model. Therefore, the coarse-mesh and fine-mesh models are solved together. The embedded analysis is more accurate than the top-down analysis because the global results are closely coupled with the fine-mesh model.

• NASTRAN Translator

  The NASTRAN translator allows the user to directly export a MAESTRO model to NASTRAN. The user can accomplish this without leaving the MAESTRO interface using the File/Export menu found in the main toolbar. The user is then prompted to select from export options, which serve to complete the data translation.

  These export options are under the categories of Part selection, Stiffener translation methodology, and Beam model methodology. The first option requires the user to select a Part to be translated, which can be either the entire model or just one module. Next, a stiffener translation option is available for the user to choose between lumping stiffeners either as bar elements or as rod elements. The third export option allows the user to choose the beam modeling method used in the data translation. The two options are the eccentric beam method or the hybrid beam method. These export options give the user more control over the translation of MAESTRO data to NASTRAN.

  In addition to having more control of the translation process, the user now has the ability to translate model data for both static analyses and eigenvalue analyses. MAESTRO creates NASTRAN equivalent element for a static analysis, but creates lumped mass elements for eigenvalue analyses. In both cases the direct translation is quick, accurate, and straightforward.

• Sparse Matrix Solver and Sparse Eigenvalue Solver

  MAESTRO has incorporated a Sparse matrix solver and a Sparse eigen solver as an alternative matrix solution. The solvers are licensed from Martec Ltd. This solver method is primarily used for models that have bad bandwidth, such as offshore platforms, and will process the analysis much quicker. For normal type ship structures, the default MAESTRO COM-solver is faster or as fast as the sparse solver; therefore the sparse method should be used in the case of bad bandwidth.This COM-based eigenvalue solver greatly decreases processing time and is able to handle bigger models. The addition of this eigenvalue solver has paved the path for future development of other eigenvalue extraction methods.

  The Eigenvalue Solver is executed by selecting the Natural Frequency option in the Loads dialog box. At this point the user has the ability to select natural frequency criteria within the MAESTRO interface, i.e. wet mode/dry mode, number of natural frequencies requested, maximum number of iterations, etc. Previously, criteria were entered manually into the MAESTRO text data file. After the analysis is complete, the user can view the mode shapes and corresponding eigenvalues without leaving the MAESTRO Modeler.

  As before, the eigenvalue solver will calculate natural frequencies in both air and water with the latter including the added mass influence. The MAESTRO Eigenvalue Solver is a feature that greatly reduces processing time as well as making eigenvalue analyses more user friendly than in the past.

   

• Martec, Ltd. Trident FEA Basic

  Martec Ltd, the authors of DSA, have enhanced their software. DSA has been replaced on their price list with “Trident FEA Basic.”

ADDITIONAL FEATURES

• New added mass module

  A new added mass module has been integrated into Maestro COM solver. The new module has the following advantages over the traditional one. Although the old added mass module is still available from the Scalable/Regular/Large Solver, it is recommended that Maestro COM solver should be used for all future modal analysis.

  • Double precision.
  • Requires much less memory.
  • Faster
  • Handle triangle elements.
  • Able to process Heel and Trim.
  • Direct iteration to wet mode, no need to run dry mode first.
  • Samples (Sphere_Tri, Sphere_quad_Half, Sphere_quad_Full)

• Solve Bigger models

  The Maestro COM solver has been extended to handle problems of virtually any size, provided there is enough disk space. It is recommended to get as much memory as possible to achieve optimal performance.

• Loads Dialog (additional options)

  The Loads dialog has undergone changes to enhance your MAESTRO analysis needs. Here is a quick list of the enhancements.

The addition of a Restraint tab for defining load case specific restraints.
The addition of a Natural Frequency Analysis tick box to allow the user to define natural frequency analysis parameters via a Criteria button.
This is used both running the MAESTRO Scalable Solver and the COM solver.
The User defined CG fields have been rearranged.

• Quick Model Construction/”The Running Man”

  A new quick construction feature has been added. “The running man” allows the user to create endpoints, additional nodes, strakes, quads, triangles, bars, rods, springs, and compounds without the presents of a dialog box.
  In the case of elements, first create a particular element, which we will call a prototype for explanation purposes, using the traditional method. Next, click on the running man icon. You are now ready to create elements at the location you define, one after the other.

• Quick Restraint Creation/Modification

  When viewing restraints via the Restraints/View General menu, the user has the ability to create and modify restraints using the right-mouse click. The user must use the Tooltips/Nodes toggle in combination with the RestraintsView General menu.

• Restraint Definition (Load Case Specific)

  The ability to override global restraints has been added for the purpose of defining load case specific restraints. This is accomplished through the Restraint tab found in the Loads dialog. This tab becomes available only after checking the Re-define constraints tick box found in the General tab of the Loads dialog

• Natural Frequency Analysis Parameter Dialog

  The addition of a Natural Frequency Analysis tick box, found in the Loads dialog, to allow the user to define natural frequency analysis parameters via a Criteria button. This is used for both running the MAESTRO Scalable Solver and the COM solver. The user can define the job type (wet or dry), method (direct or subspace), number of modes to be solved for, maximum number of iterations, eigenvalue tolerance, frequency shift, and sturm sequence shift factor.

• View Natural Frequency Mode

• Dynamic Zoom/Pan

  Dynamic zoom and dynamic pan has been added. Here is a quick list of how to use these features:

  • Dynamic zoom
    • Zoom In - using the middle wheel button, scroll up.
    • Zoom Out - using the middle wheel button, scroll down.
  • Dynamic pan – using the middle wheel button + holding the shift key, hold down the wheel button and move mouse cursor.
  • Dynamic spin – hold down the middle wheel button and move mouse cursor.
    
• XML-Notepad (Introducing *.pex)

  The user has the ability to view the equivalent *.mdl using XML Notepad. This is accomplished by saving the model as a *.pex file. The user will find this option when using the File/Save-as command under the main menu.

• Automatic Collapsed Element Check

  Modeler will automatically check for collapsed triangles, quads, rods, and bars before launching the Maestro COM-solver, or before translating the data to a native MAESTRO data file.

• Real time Update (Volume pressure side/Wetted strake elements)

  The ability to update the volume normal and wetted strake “flag”, via the right-mouse click, without re-loading the model.

• Compute Hull Girder Radii of Gyration

  The ability to compute hull girder radii of gyration has been added. This is accomplished by selecting Load/Compute Gyradius. This is followed by a Calculate Radii of Gyration dialog that requires the user to input the center of rotation.

• View Stiffener Side

  The ability to view the stiffener side of the model has been added. This is accomplished by selecting View/Plate/Stiffener side.

• View Element Normal Side

  The ability to view the element normal side has been added. This is accomplished by selecting View/Plate/Element normal side from the main menu.

• View Corrosion Side

  The ability to view the corrosion side of a corrosion group has been added. This is accomplished by selecting the View/Plate/Corrosion Side from the main menu.

• View Plate Thickness (with Corrosion affects)

  The ability to view plate thickness with the affects of corrosion on corrosion groups has been added. This is accomplished by selecting the View/Thickness/With Corrosion from the main menu.

• Volume table output

  The “Volume Table” summary now includes each tank center of gravity and the total volume of all tanks.

• Weight Summary Table

  A weight summary including: structural self-weight/CG and gross weight/CG of each module, each tank weight/CG, each nodal group weight/CG, each plate group weight/CG, and each point load weight/CG is now available by using the Weight Summary option found under the Hull menu in the main tool bar.

• Point Loads (Mass/Inertia)

  Mass and inertias can be defined at the Point Force tab found in the Loads dialog. The user must enter the full value for the a centerline node when dealing with a half-model. The user can also add a point load with defined mass/inertias to a nodal group.

• Corrosion Group

  A corrosion group has been added. This allows the user to define a group that will consider corrosion affects. The user can define which side (stiffener, plate, or both) the corrosion affects occur. Further, the user can choose to apply corrosion by percentage or as a Net. The user can apply corrosion to the plate, web, or flange associated with the corrosion group.

• Bill of Materials

  A bill of materials table is produced in the Output tab. This is accomplished via the right-mouse click when the mouse cursor is placed on a current part in the Parts Tree.

• Longitudinal Effective Member Flag

  A feature to view and change longitudinal effective structures has been added. The structural longitudinal effective flag only affects hull girder properties, such as neutral axes, shear centers, moment inertias, etc. Because the flag does not affect 3-D FEM results, the check box Providing longitudinal strength has been removed from element dialogs.

CORRECTIONS/CHANGES

• Windows Installer Clean Up Utility

  Use “Windows Installer Clean Up Utility” if you are having problems installing Maestro version 8.5.1. This utility allows the user to safely remove Windows Installer settings from your computer in the even of a problem.

  http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q240116&

• MAESTRO Regular and Large Solver

  Maestro large solver has been completely removed from the installation. MAESTRO Regular solver is only accessible after typing “maestro regular” in the command line.

• MG/DSA 8.0 and 8.2

  MG/DSA 8.0 has been removed from the MAESTRO installation. MG/DSA8.2 can now be accessed from File/Analyze/MG8.2.

  To run the new Vast/DSA (Trident FEA Basic), a separate lock is required. Users with a valid maintenance and support license should contact Martec Ltd (902-425-5101) to acquire a lock.

• Hoops 7.0

  MAESTRO has been upgrades to Hoops 7.0.

• Fortran Compiler

  MAESTRO has been update to Fortran Compiler 6.6B

• Plate Thickness Legend Bug

  Fixed a bug displaying plate thickness in range.

• Mirror Centerline Tank Bug

  Fixed a bug found when mirroring tanks with centerline elements. In previous versions, if centerline elements were defined in a tank, those elements would not be included in the mirrored tank; therefore, the users had to manually add those elements to completely define the mirrored tank.

• Scalable/Regular Solver

  Fixed a bug in Salable/Rgular solver regarding additional panel/beam stress recovery.
  Fixed a bug of ignoring scale mass in Scalable/Regular solver.
  Fixed a bug of additional node gap in Scalable/Regular solver.

• Deletion of Folders Update

  The ability to delete group folder and all groups in the folder via right-mouse click. In previous versions, the user was forced to delete all individual groups before deleting a folder.

• RSpline Elements Mirror

  RSpline (rigid spline) elements will be mirrored upon using the mirror/add mirror command.

MAESTRO 8.5 

• Maestro COM Solver: The corner stone of the next generation of Maestro
  • Developed under Microsoft COM (Component Object Model)-based technology.
  • Pure finite element solver used for both coarse mesh and fine mesh analysis.
  • Fully encapsulated, small, fast, stable, easy to maintain and modify.
  • Time proved Maestro Fortran code wrapped by C++.
  • The beams attached to a plate can be modeled as native eccentric beam (MSC/Nastran style), modified eccentric beam and traditional maestro style hybrid beam.
  • Uses the geometry and load vector Modeler created. What you see is what you get.
  • Avoid costly and error prone file translation.
  • Speed test comparison has been performed on a Dell Inspiron 8000 laptop, equipped with 850 Mhz CPU and 512 MB RAM

     

    Model	Nodes	Elements	Maestro Scalable Solver (No stress calculation)*	COM Solver (No stress calculation)	COM Solver (With stress calculation)
    CG52	6067	13940	10 minutes 20 seconds	2 minutes 19 seconds	3 minutes 9 seconds
    LHD	10933	26701	24 minutes 47 seconds	8 minutes 2 seconds	8 minutes 39 seconds
    * There will be another 30 seconds if generating Maestro data file and loading the results are included.

   

• Maestro Top Down Fine Mesh Module
  • Provide an alternative top down fine mesh analysis other than MG/DSA.
  • Easy to identify Master/Slave nodes.
  • Automatically synchronize master/slave nodes.
  • Automatically map the coarse mesh load into the fine mesh model.
  • Allow multiple fine mesh models for one structure.
  • Almost all functions for the coarse mesh model can be used for the fine mesh model. There is almost no learning curve.
• MSC/Nastran interface (import/export)
  • Translate geometry, load and boundary condition to a fixed format, small field Nastran data file. The stiffeners on the plates will be automatically lumped as offset beams.
  • Automatically synchronize master/slave nodes.
  • Define RSpline element by manual selection.
  • Import a Nastran file.
• General Update
  • Add general group for Maestro fine mesh analysis.
  • Add RSpline (Rigid Spline) element. The RSpline element is currently used for defining Master/Slave nodes for top down fine mesh analysis. This element is intented to be used as a transition element in the future.
  • Able to balance End-Shear in the modeler.
  • Calculate total mass of each category for each load case.
  • Modeler begins to save all results in jobname.rlt. There will be no need to import Maestro result once *.rlt is created.
  • Allow user to define multiple scale module groups with more than one module. (Previous version only allowed one multiply module group).
  • Allow user to define mass on plate group (The mass will be evenly distributed based on element area), load mass on a plate and view mass on plate.
  • Allow user to define mass on individual node.
  • Directly access Maestro How to..., Maestro Tutorial and release nodes from mainframe menu HELP. 
  • Update Masetro Data Preparation Manual.
  • New Maestro Tutorial Manual.
  • Improve the speed of loading a model.

Updates in Maestro 8.1.9

• 8.1.9-1. Fixed a bug in the solver on weight and volume calculation of pointed strakes.
• 8.1.9-2. Fixed a bug in the Modeler on exporting  scaled substructure.
• 8.1.9-3. Fixed a bug in the Modeler on importing strake stiffener orientation due to the change of 8.1.8-3.
• 8.1.9-4. Add importing/exporting strake "Edge" load.
• 8.1.9-5. Fixed a bug in the solver on orthotropic plate calculation.

Updates in Maestro 8.1.8

• 8.1.8-1. Restore the fixed 8.1.5-1 due to an error in the solver.
• 8.1.8-2. Fixed a bug in the solver on ENDSHEAR balance.
• 8.1.8-3. Modeler enhancement on strake panel nodal orientation. The local X is now the same as strake endpoint direction instead of frame direction.
• 8.1.8-4. Fixed a bug in the solver on stress calculation of addition beams with distributed load.
• 8.1.8-5. Remove load case parameter "N", and always make the solve to calculate the total mass or the overall center of gravity. This will fix a bug of volume calculation in the solver.
• 8.1.8-6. Eliminate Item 7 and Item 8 of  "Data Group XI - Transverse Frame Scantlings" because of the inconsistency of structure and load.
• 8.1.8-7. Eliminate Item 7  of  "Group I(b) - Module Default Values", because a non zero value and a variable module spacing could cause problem.
• 8.1.8-8. Fixed a bug of displaying free edges when a quad degenerates to a triangle.
• 8.1.8-9. Speedup free edge update.
• 8.1.8-10. Fixed a bug of creating a restraint attached to compound rods.
• 8.1.8-11. Fixed a rendering bug of a non-zero reference end point.

Updates in Maestro 8.1.7

• 8.1.7-1. Fixed a bug in the solver where the immersion data was ignored if balancing was not being done within the solver.
• 8.1.7-2. Fixed a bug in the modeler where in some cases few quad element results were incorrectly overwritten by compound triangle element results.

Updates in Maestro 8.1.6

• 8.1.6-1. Upgrade Fortran compiler to Compaq Fortran 6.6.
• 8.1.6-2. Modify solver to accommodate change 8.1.5-1.
• 8.1.6-3. Fixed a bug in the solver of calculating stresses of additional beam in some special cases.
• 8.1.6-4. Flat bar stiffeners are allowed in ultimate strength calculation.
• 8.1.6-5. Fixed a bug in the modeler of mirroring the loads. 
• 8.1.6-6. Fixed a bug in the modeler of importing maestro data file when the units of mass and weight are different. 
• 8.1.6-7. Add a feature in the modeler of hull girder plots to include end moments and shear forces.
• 8.1.6-8. MG version 8.2 can now be accessed from File->Analyze->MG 8.2.  VAST/DSA can not be launched from MG 8.2 without an additional lock. 

Updates in Maestro 8.1.5

• 8.1.5-1. The nodal orientation of "Strake Replacement Panel" is now internally converted based on right hand rule. Users no longer have controls on the nodal orientation of       "Replacement Panel".
• 8.1.5-2. Add a button and a popup menu to rotate element local X orientation.
• 8.1.5-3. Add a feature to view the angle between an element local X and the global X.
• 8.1.5-4. Add a feature to check the connectivity of the whole structure.
• 8.1.5-5. Add a feature to check and automatically delete duplicated elements.
• 8.1.5-6. Add a feature to turn off a known free edges.
• 8.1.5-7. Add a feature to delete unused nodes.
• 8.1.5-8. Eliminate the duplication of center line girders when performing "Add Mirror".

Updates in Maestro 8.1.4

• 8.1.4-1. Fixed a bug in the modeler when converting volume mass into modeler internal nodal force.
• 8.1.4-2. Fixed a bug in the modeler when mirroring center line groups.
• 8.1.4-3. Fixed a bug in the modeler when  a node is only referenced by a compound prototype element.
• 8.1.4-4. Add a feature to display hull girder horizontal net force/shear force/bending moment in the structural coordinate system.
• 8.1.4-5. Element shear stress is now displayed as an absolute value.
• 8.1.4-6. Exporting exact PERIMETER value.
• 8.1.4-7. Fixed a bug in the modeler when  deleting a module if the module is referenced by a group.
• 8.1.4-8. Add gallons/barrel/liters/bushels/quarts for volume conversion.

Updates in Maestro 8.1.3

• 8.1.3-1. Fixed a security related bug, which prevents running Eigenvalue and optimization.
• 8.1.3-2. Fixed a bug related to restraints of models with structural-symmetric only.

Updates in Maestro 8.1.2

• 8.1.2-1. Fixed a bug in the Modeler when exporting  "Rigid Bay Set".
• 8.1.2-2. Fixed a bug in the Modeler of modifying  "Bay group" name.
• 8.1.2-3. Fixed a bug in the Modeler when displaying  "Bay group" with context views.
• 8.1.2-4. Fixed a round-off error in the solver relating panel stiffener layout with BBS setting.
• 8.1.2-5. Disable the progress bar in the Modeler for Windows 98 operating system, which would cause a crush.
• 8.1.2-6. Change of security scheme for network lock.
• 8.1.2-7. Sentinel Driver is included in the installation.
• 8.1.2-8. Display hull-girder station Load/Shear Force/Bending Moment on the output pane, and the data can be copied and pasted to Excel/Word.
• 8.1.2-9. Display cross sectional properties on the grid pane, and the data can be sorted, copied and pasted to Excel/Word.
• 8.1.2-10.Display nodal/element information on the grid pane, and the data can be sorted copied and pasted to Excel/Word.
• 8.1.2-11.Add a new feature in modeler's nodal group selection, a batch of nodes with same global x-coordinates can be selected with one single click.
• 8.1.2-12.Add a new feature in modeler's point load selection, a nodal group can be selected as a point load, all concentrated forced will be evenly distributed in the nodes of the nodal group. 

Updates in Maestro 8.1.1

• 8.1.1-1. Fixed a bug in the Modeler displaying aspect ratio.
• 8.1.1-2. Modified Modeler internal angle calculation algorithm.
• 8.1.1-3. Modified Modeler Quad4 warped angle calculation algorithm.
• 8.1.1-4. Eliminate the flag/check box of "pressure reverse", which was designed for editing maestro data text file by hand. This flag is now replaced by reversing the element nodal orientation with one button click. There is no need to do anything for existing models.
• 8.1.1-5. Fixed a bug in the Modeler relating to the "Mass Per Length" option.
• 8.1.1-6. Fixed a bug in the Modeler related to copying new load case.
• 8.1.1-7. Fixed a bug of girder stress calculation when non-uniform section spacing is specified.
• 8.1.1-8. Fixed a bug in the SEC strake option, where the stiffness of second flange was not included.
• 8.1.1-9. The origin of a wave is now changed to the Reference origin for all three solvers (Regular/Large/Scalable), which is consistent with the Modeler's wave profile definition.  Users should manually edit any earlier versions if there was a wave.

Updates in Maestro 8.1.01

• 8.1.01-1. Fixed a bug of reporting station force in Maestro output file.
• 8.1.01-2. Modeler can display negative pressure of LINPRESS.

Updates in Maestro 8.1.00

• 8.1.00-1. Update documentation.
• 8.1.00-2. Fixed a bug in the Modeler importing/exporting Bay/Set.
• 8.1.00-3. Fixed a bug in the Modeler importing MASSEND/MASSNODE.
• 8.1.00-4. Fixed a bug in the Modeler displaying constraints.
• 8.1.00-5. Nodal joint tolerance can now be set for criteria type " FORENSIC/DNV_HSAL/DNV_HSST/DNV_SHIP".

Updates in Maestro 8.0.47

• 47-1. Maestro Scalable Solver allows user to choose Professor Joem Paik's panel failure evaluation  method (ALPS/ULSAP). The entry is defined on JobInfo Dialog Structure Page,  and Item 11 of Structure Parameters of Maestro input data.
• 47-2. MGDSA code update to accommodate the kernel change of Compaq Fortran 6.5A.
• 47-3. Maestro Solver adds new keyword "INTERVALSINGLE" to allow  one value of mass per length on each line.

Updates in Maestro 8.0.46

• 46-1. Fixed a Bug in the Modeler buoyancy force due to wave.
• 46-2. Fixed a Bug in the Modeler exporting on Restraint's "FAST".
• 46-3. Fixed a Bug in the Modeler exporting on Bay Set option "RIGID".
• 46-4. Fixed a Bug in the Modeler weight calculation of Compound elements.
• 46-5. Maestro Manual and help files update.
• 46-6. Modeler now calculates hull girder shear force and bending moment. The diagram is plotted on the centerline of balanced average flotation plane, and all 3 force components have been taken into account.
• 46-7. For non-SI units, the weight is now force (lbf), not the mass (lbm).

Updates in Maestro 8.0.45

• 45-1. Modeler can balance ship under Quasi-Static wave . 
• 45-2. Display Hull girder weight distribution, buoyancy distribution, shear force and  bending moment diagram. 
• 45-3. Check and display warped elements.
• 45-4. Check and display element internal angle.
• 45-5. Check and display quad elements aspect ratio.
• 45-6. Bugs fixed on Modeler volume report.
• 45-7. Bugs fixed on flipping volume normal.
• 45-8. Define one joint tolerance for the whole model, remove joint tolerance of each module.
• 45-9. Bugs fixed on Modeler cross sectional property calculation.
• 45-10. Reduce the size of the restraint dialog.

Updates in Maestro 8.0.42

• 42-1. Implement new network secuirty for the solver.
• 42-2. Bugs fixed in Modeler import centerline data, pressure load, acceleration. 

Updates in Maestro 8.0.41

• 41-1. Check volume group integrity

Updates in Maestro 8.0.40

• 40-1. Upgrade Fortran compiler to Compaq Fortran 6.5
• 40-2. View groups with user defined color.
• 40-3. Job comments can be defined.
• 40-4. Read *.pld, *.pls, *.pla files.
• 40-5. Toggle colored elements
• 40-6. Change legend font color and size

Updates in Maestro 8.0.39

• 39-1. Large solver changed to allow increased core, from 2.0e06 to 9e06.
  39-2. Large solver can only be accessed through Modeler 8.1 due to a bug in Maestro shell.

Updates in Maestro 8.0.30

• 30-1. DSA now includes new solid modeling features, including routines to convert
  existing shells into bricks.
• 30-2. Correction in MG/DSA to the link between the GUI and the VAST solver.

Updates in Maestro 8.0.29

• 29-1. Vast executable updated.
• 29-2. Modeler updated to allow FATIGUE option.
• 29-3. Solver change in part5C, preventing overwrite in prefix.amd (eigenvalue calculations)
• 29-4. Large solver changed to allow increased core, from 2.0e06 to 3.5e06.

Updates in Maestro 8.0.28

• 28-1. Special Build

Updates in Maestro 8.0.27

• 27-1. Nastran translator updated to increase number of significant figures for forced displacements. This allows greater accuracy for metric model conversions.
• 27-2. Solver corrected so that the actual labels of additional elements are exported to the .DAT.
• 27-3. Modeler tooltips corrected for volumes.
• 27-4. Modeler enhanced with a new mirror function. Users can now mirror structure, groups, and centerline elements.
• 27-5. Solver eigenvalue routines corrected to prevent array overflow.

Updates in Maestro 8.0.26

• 26-1. Solver corrected so that unused endpoints are not counted as centerline endpoints.

Updates in Maestro 8.0.25

• 25-1. Solver improvement in Optimization.
• 25-2. New Solver feature in restraints: for large number of restraints, the FAST option on the general restraint line will use an optimized algorithm to calculate reaction forces. The accuracy of the calculation is slightly diminished, but the speed of the process is vastly improved.

Updates in Maestro 8.0.24

• 24-1. Minor format change in Solver part5C, which allows 6 digits per integer, rather than 4, in prefix.gom.
• 24-2. Modeler updated to repaint screen after closing Groups dialog in W95/W98.
• 24-3. Modeler updated so that CLOSE keyword is no longer written in the balancing line.

Updates in Maestro 8.0.23

• 23-1. Solver changed to improve calculation of gyradius.
• 23-2. MG changed to restore auto-load from Shell.

Updates in Maestro 8.0.22

• 22-1. Modeler updated to make additional beams more visible: the color has changed to light orange.
• 22-2. Solver changed to improve processing of CREST and HOLLOW loads. The CREST, HOLLOW, and NOBALANCE keywords now must be located before the ACCEL keywords.

Updates in Maestro 8.0.21

• 21-1. Modeler updated to correct the format of Mass Groups on export.
• 21-2. Solver size parameters increased to previous levels.

Updates in Maestro 8.0.20

• 20-1. MGDSA updated to improve translation of rods into NASTRAN.
• 20-2. Solver mass plotting changed to eliminate duplication of nodes at module boundaries.
• 20-3. Modeler updated to improve calculation of girder orientation angle.
• 20-4. Modeler changed to correctly export quad stiffener orientation.

Updates in Maestro 8.0.19

• 19-1. Solver updated to improve calculation of eigenmodes.
• 19-2. Solver updated to remove CLOSE option from balancing. The CLOSE option is no longer a valid choice for balancing.
• 19-3. Modeler updated to remove references to sandwich panels. Maestro plates can no longer be sandwich type elements.
• 19-4. Modeler updated to limit deletion information to eight sections per line.
• 19-5. MG changed to place plot files in the current directory with the geometry files.
• 19-6. Solver updated in ACCELERATION line. Both the translational and rotational accelerations are now in X,Y,Z order.

Updates in Maestro Version 8.0.18

• 18-1. Solver updated to improve reported stresses in warped quad4 element.
• 18-2. Modeler updated to improve identification and differentiation of similar module names.
• 18-3. Modeler updated to maintain orientation of stiffeners on additional panels.
• 18-4. MG/DSA updated to include new Fracture and Thermal features.
• 18-5. MG/DSA updated to allow execution of external FE applications from the DSA interface.
• 18-6. Solver updated to clarify distinction between 'reversed' and 'wetted' triangles for immersion loads.
• 18-7. Solver updated to improve calculation of torsional moment.
• 18-8. Modeler updated to improve import of .dxf files. Segments of curves are no longer lost on import.

Updates in Maestro Version 8.0.17

• 17-1. Solver updated to correct calculation of volumes.
• 17-2. Solver updated so that triangle elements report stresses in the local coordinate system.
• 17-3. Modeler updated to export PERIMETER data in lines of 80 characters or less.
• 17-4. MG/DSA updated in Interface menu. All export/import options are listed under the new menu item, "FE Options."

Updates in Maestro Version 8.0.16

• 16-1. Solver updated to remove effect of additional beam bending on panels.
• 16-2. Solver updated to automatically include replacement panels in section modulus and bending moment calculations.
• 16-3. Solver updated to correct MASSPERLENGTH calculations.

Updates in Maestro Version 8.0.14

• 14-1. Solver updated in MASSEND/MASSLOAD load algorithm.

Updates in Maestro Version 8.0.12

• 12-1. Solver and MG updated to be able to plot strake plate bending stresses
• 12-2. Solver updated to produce error message for a degenerate quad4 element

Updates in Maestro Version 8.0.11

• 11-1. Modeler Updated to plot plate thickness in the user's choice of units
• 11-2. Solver updated to handle BAY/SET rigid option for more than 8 nodes per set
• 11-3. Solver updated to allow girder tripping calculation when the primary strake has been deleted via DELETIONS.

Updates in Maestro Version 8.0.10

• 10-1. Modeler updated for triangles to match Solver's unstiffened plate triangle. In addition the line length in the .mdl file was increased to 512 characters to prevent problems for strake/girders in models with more than 14 sections.

Updates in Maestro Version 8.0.9

• 9-1. Modeler allows storing of the user's preferred Rendering Algorithm in modeler.ini
• 9-2. Modeler and Solver have been updated to handle overturning moments for the Bay and Set Option. Refer to DPRP-V8.PDB.
• 9-3. Modeler has been updated to provide the proper balancing information to the Solver. Refer to DPRP-V8.PDB for more detail regarding the two new options ADJUST and CLOSE.
  

Release Notes for MAESTRO Version 8.0.6

The following briefly summarizes the main features of MAESTRO Version 8.0:

• 6-1. Maestro Version 8.0 is a true Win32 application intended for use under Windows95/98/NT platforms.
• 6-2. There is no need for additional hardware locks since the software uses the same security system used by Version 7.1 and later. This allows the user to keep the 7.1 installations on the PC while using Version 8.0 without need to change hardware locks. The user will need to run the program installed under the installation subdirectory called 'Key Update'. Double click the program called lock7to8. This is necessesary to activate the DSA Modeler if you have purchased the DSA System.
• 6-3. The installation also provide several Adobe Acrobat (pdf) files which you can use for quick reference and searching without the need for looking up information in the hard copy manual. Feel free to print additional pages as needed.
• 6-4. A new Maestro Manager Program has been developed to support the new features of the Maestro System. This Program is what you see when you start Maestro. The program allows the user to set working path and project names as well as batch loading and solving of solver jobs. The settings can be stored in separate job files (*.job). The recent file list allows quick access to several projects and their settings.
• 6-5. This version of MAESTRO introduces a new Modeler for MAESTRO. The modeler is a true Windows program with the usual Windows type interfaces. Refer to the Modeler Manual and Tutorial.
• 6-6. The Modeler provides many new features in way of helping the user create a structural model. Refer to the Modeler Manual for an overview and description of the capabiities of the Modeler.
• 6-7. The MAESTRO Solver is based on the definition of mass rather than weight as it was the case for Version 7.X. The solver treats all structural definition as mass and allows the user to model additional mass with separate mass commands. The mass is subjected to accelerations in all six degrees of freedom about a point which can be calculated by the
  program or specified by the user. Refer to the Data Preparation Manual for an in-depth description.
• 6-8. The MG/DSA system been extensively improved especially in the refine and mesh options. Refer to the online help or the online manual accessed under 'Resources'. The dsa solving system is fully integrated into Version 8.0.
• 6-9. The MG/DSA program also allows general FE analysis. The user can purchase options for non-linear material and geometry, eigenvalue analysis, buckling analysis. Please contact DRS C3 for details and look out for a description in the next 'Fast Times' news letter.
• 6-10.Enjoy.

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