Patran 2020

Release Guide

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Con t en t sPatran Release Guide

Contents

1 Patran 2020 at a GlanceKey Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

General Enhancements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Supported OS/Hardware Platforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Supported CAD Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Known limitations in current release: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Supported Analysis Preferences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2 General EnhancementsNastran Embedded Fatigue (NEF) Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Nastran Dynamic Analysis Using Channel Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Enhanced HDF5 Results Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

MSC Fatigue Enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Index

Patran Release Guidevi

Chapter 1: Patran 2020 at a Glance. MSC Nastran Implicit Nonlinear (SOL 600) User’s GuidePatran Release Guide

1 Patran 2020 at a Glance

Key Highlights 2

Supported OS/Hardware Platforms 3

Supported CAD Access 5

Supported Analysis Preferences 7

Technical Support 8

Patran Release GuideKey Highlights

2

Key Highlights

General EnhancementsThe following general enhancements have been implemented in the Patran 2020 version. Please see Chapter 2 for details.

Nastran Embedded Fatigue (NEF) Support, 11

Nastran Dynamic Analysis Using Channel Files, 14

Enhanced HDF5 Results Support, 17

MSC Fatigue Enhancements, 22

3Chapter 1: Patran 2020 at a GlanceSupported OS/Hardware Platforms

Supported OS/Hardware Platforms

For a complete description of these configurations, see Required Hardware & Software Configurations (Ch. 5) in the Patran Installation and Operations Guide.

Vendor Description

Windows For information on Operating Systems and Hardware support, please see Microsoft Windows Requirements (p. 67) in the Patran Installation and Operations Guide

Linux For information on Operating Systems and Hardware support, please see Linux Requirements (p. 83) in the Patran Installation and Operations Guide.

Patran Release GuideSupported OS/Hardware Platforms

4

Important: 1. The default Patran installation directory on Windows has been changedFrom:

C:\MSC.Software\Patran_x64\20xx

To:

Possible issues one may encounter when using the default installation path:

P3_TRANS.INI file in P3_HOME: Editing or modifying any file located in C:\Program Files\ requires your application to be run as Administrator. If you are already logged in as Administrator, you can start Notepad or any other text editor with the “Run as Administrator” option. This allows you to browse and open P3_TRANS.INI for editing. Notepad++ automatically understands this requirement and gives an option to start another instance of the application as Administrator. For other applications like Notepad, you must decide to start the application with “Run as Administrator” beforehand by using the Right Mouse Button on the application’s icon to select this run option. Do not start the editor with a double click of the Left Mouse Button. This is a security feature of Windows to prevent accidental or unauthorized changes to your installation.

During installation, the Configuration Tool to edit the P3_TRANS.INI file may be used. But once the installation is done, the P3_TRANS.INI file cannot be edited using the Configuration Tool (i.e. Configuration Utility). A message shown as 'SELECTED FILE IS READ-ONLY' will be displayed.

2. The FLEXlm license server has been upgraded to Helium.

3. When Nastran 2020 Service Pack 1 and Marc 2020 are installed in their default installation directory locations (e.g., ), Analysis Manager does not work in combination with Patran on the Windows operating system. If you need to run Analysis Manager, it is required to install Patran, Nastran, and/or Marc in directories names that do not contain a space.

4. The Patran help system does not support Mozilla Firefox version 68 or higher. Please use Mozilla Firefox version 67 or lower.

5. Patran 2020 complies with IPv6 specification with the following exception:

Analysis Manager (expected to be compliant in a subsequent release)6. To meet user expectations and maintain Patran current with the latest technology, the

following feature of Patran 2020 may not be available in future releases. Please plan accordingly.

Express Neutral Files import/export

5Chapter 1: Patran 2020 at a GlanceSupported CAD Access

Supported CAD AccessThe following CAD systems are supported using the new CAD import methods.

Known limitations in current release:1. Occasionally closed surfaces are not converted to solids on import of IGES, ACIS, and CATIA V4.

Instead of solids, surfaces are imported.

2. There is no support for import of nodes/elements from IGES files using the “Import to Parasolid” toggle.

3. Export of IGES files may result in loss of some surfaces/solids - not all entities are exported.

4. Some IGES and Pro/ENGINEER parts import unexpected surfaces.

5. Some IGES, STEP, and ACIS parts import a broken or incomplete model.

6. The global element length (GEL) that gets set and used during import is different than previously supported import methods.

7. Certain files may import using the default import method but may not import using other (non-default) methods or vice-versa (using the “Import to Parasolid” toggle).

8. Editing/updating features using automatic feature recognition leads to different geometry as compared to previously supported import methods.

9. Mid-surfaces are different compared to previously supported import methods.

10. The naming of groups is different than previous supported import methods for all CAD geometry types.

11. Unigraphics (UG) parts containing defined features do not recognize features like the deprecated UG import in Patran.

Windows Linux

ACIS Up to R27 Up to R27

CATIA V4 All 4.xx All 4.xx

CATIA V5 R10 to R29 R10 to R29

IGES 3, 5, 5.2, 5.3 3, 5, 5.2, 5.3

Pro/ENGINEER / Creo (.prt/.asm) WF 4, WF5, to Creo 6 WF 4, WF5, to Creo 6

SolidWorks Up to 2019 Up to 2019

STEP 203, 209, 214, 242 203, 209, 214, 242

Unigraphics NX 5.0, 6.0, 7.0, 7.5, 8.0, 9.0, 10, 11, 12, 1847

NX 5.0, 6.0, 7.0, 7.5, 8.0. 9.0, 10, 11, 12, 1847

Parasolid 30.1 30.1

Patran Release GuideSupported CAD Access

6

12. Take care as there may be a mismatch of the native CAD geometry units and Patran model units, with no informative message.

13. Exported files that are subsequently imported back into Patran may not contain the same exact entities as sometimes solids are imported as surfaces.

14. CATIA V5 import notes:

• Hidden entities are imported by default. Turn OFF the "Import Attributes" option on the Catia Options form if this is not desired.

• Import of hidden entities may make the model appear "zoomed out."

• Only Entities from the Master Workspace are imported.

• Planes are ignored and not imported.

• Occasionally axes import as curves.

7Chapter 1: Patran 2020 at a GlanceSupported Analysis Preferences

Supported Analysis Preferences

Solver Platforms Solver Version

MSC Nastran*†

*MSC Nastran has discontinued support of i4 databases. All output results produced by MSC Nastran 2017 or later are only available as i8 databases (DBALL/MASTER). Support for result access via DBALL/MASTER file has been discontinued. Result access through Output2 (PARAM,POST,1), XDB, and HDF5 should be used as an alternative with HDF5 as the standard default.

†MSC Nastran 2017 and higher does not convert INTEGER input to REAL if entered as an integer in a real input field. Instead, a fatal message is issued. To bypass this, specify system cell NASTRAN SYSTEM(444)=9 as first line in the FMS section. It is recommended that users import input files that run through MSC Nastran with no fatal errors. When importing files with this system cell, no fatal messages are issued due to integer to real conversion. In general, when importing detects a FATAL error message, Patran issues this message:Problem detected while importing the MSC.Nastran input file using

SOL nifimp_v22

All 2020 Service Pack 1

Marc All 2020

Dytran All 2019 Service Pack 1

Flightloads All 2020

Thermal All 2020

Fatigue All 2020

MSC Sinda All 2017.1

LS-DYNA3D All 971

PAMCRASH All 1995 / 1997

Abaqus(.odb) All 2017

ANSYS‡

‡Results access is enhanced to ANSYS 19.2 (results import is frozen at ANSYS 8.1).

All 19.2

Patran Release GuideTechnical Support

8

Technical SupportFor technical support phone numbers and contact information, please visit: http://www.mscsoftware.com/Contents/Services/Technical-Support/Contact-Technical-Support.aspx

Support Center (http://simcompanion.mscsoftware.com)The Support Center provides technical articles, frequently asked questions and documentation in a single location.

Online Resources (www.mscsoftware.com)MSC Software corporate site with information on the latest events, products and services for the CAD/CAE/CAM marketplace.

http://www.mscsoftware.com/Contents/Services/Technical-Support/Contact-Technical-Support.aspxhttp://simcompanion.mscsoftware.comwww.mscsoftware.com

9Chapter 1: Patran 2020 at a GlanceTechnical Support

Chapter 2: General Enhancements. MSC Nastran Implicit Nonlinear (SOL 600) User’s GuidePatran Release Guide

2 General Enhancements

Nastran Embedded Fatigue (NEF) Support 11

Nastran Dynamic Analysis Using Channel Files 14

Enhanced HDF5 Results Support 17

MSC Fatigue Enhancements 22

11Chapter 2: General EnhancementsNastran Embedded Fatigue (NEF) Support

Nastran Embedded Fatigue (NEF) SupportMSC Nastran 2020 has implement support for the following new features for fatigue analysis. Listed here are the actual Nastran entries and new field or case control values.

FTGPARM NANGLE - this is the ability of a fatigue analysis that has requested a critical plane analysis to define the number of angles in the plane to compute the principals and determine fatigue life. The default is 36 angles, but can be defined from anywhere between 10 to 360 angles. In actuality, only half the angles are computed since the principals are the same 180 degrees opposite any computed angle.

FTGDEF NENTS - this is the ability to designate how many entities to return from the fatigue analysis based on either the most damaging entities or the entities with the greatest stress ranges.

FATIGUE(STROUT=) - this is the ability to request additional output associated with a fatigue analysis, specifically the input and out output stresses or strains used or computed by the fatigue analysis at only the locations designated or returned by the fatigue analysis. See Enhanced HDF5 Results Support, 17 for details of these specific output requests.

MSC Patran 2020 now supports these features in the following ways:

Set the number of angles for critical plane analysis:

• Enter the Analysis application for MSC Nastran preference

• Set the Solution Type for to either LINEAR STATIC (SOL 101), NORMAL MODES (SOL 103) or TRANSIENT RESPONSE (SOL112) with Formulation: Modal

• Open the Solution Parameters Form

• Open the Fatigue Parameters Form

• Set the Stress Combination to Critical Plane

• Set the # of Angles to the desired setting

The number of angles can be set to any value that divides evenly into 360 from 10 to 360. This can be done with the slider bar or typing in a value in the corresponding data box. On translation, a FTGPARM NANGLE entry is written to the Nastran input file.

Set the number of entities to retain from the fatigue analysis:

• Again from the Analysis application, Solution Parameter form, Fatigue Parameter form for SOL 101, 103, or 112

• Set the Number of Entities to Retain

• Set whether the criterion is Based on: Damage or Range

The number of entities to retain is written to the FTGDEF NENTS field on translation to a Nastran input file. This can be used in conjunction with the Top Stress Percentage and Top Damage Percentage filters. If using these two settings result in less than the number of retained entities requested, then only those entities are returned.

Patran Release GuideNastran Embedded Fatigue (NEF) Support

12

Figure showing how to set the number of angles and number of retained entities:

13Chapter 2: General EnhancementsNastran Embedded Fatigue (NEF) Support

Request various stress or strain outputs associated with the fatigue analysis:

• Again from the Analysis application

• Open the Subcases form

• Open the Output Requests form

• Select Fatigue Life as an Output Request

• Set the desired Fatigue Stress/Strain Requests (STROUT)

Figure showing how to set the stress or strain output requests from a fatigue analysis:

Import of Nastran input files that contain FTGDEF NENTS, FTGPARM NANGLE, and FATIGUE(STROUT=) case control is supported and for the imported input file a job is created and sets the various widgets for the job as shown in the above figures.

Patran Release GuideNastran Dynamic Analysis Using Channel Files

14

Nastran Dynamic Analysis Using Channel FilesMSC Nastran 2020 has implement support for the following new feature for defining or applying dynamic loads in a modal transient analysis (SOL 112):

Typically dynamic loads are set up in Nastran with the time variations defined via a TABLED1 entry. The TABLED1 entry can be very long and time consuming to create. In many cases the dynamic loading is from measurements in the field. Certain industry standard files are used to store measured and/or computed loading and are referred to here as channel files. These files are sometimes referred to as RPC files or multi-channel files. They are multi-channel because they can contain loading input at various locations from a test specimen that act simultaneously. These files typically have .rpc, .rsp, .dac, and .s3t file extensions.

It is a chore to convert data from these file into corresponding TABLED1 entries that can be used in Nastran. The TABLRPC entry eases this burden by allowing the user to associate one of these files and a channel from the designated file as a dynamic load in place of a TABLED1 entry. Internally Nastran converts the channel file data to TABLED1 entiries when it sees a TABLRPC entry of the same ID. Practically speaking, any Nastran entity or field that references a TABLED1 ID (TID) should actually be able to use a TABLRPC entry, thus it is not limited to dynamic analysis, but it has been implement specifically for SOL 112 dynamic analysis.

TID - a unique table ID; a corresponding TABLED1 of the same ID is produced by Nastran XAXIS/YAXIS - this defines the x and y-axes as LINEAR or LOGarithmic - same as a TABLED1

entry UID - the ID of a UDNAME entry that specifies the channel file TYPE - RPC, DAC, or S3T for .rsp/.rpc, .dac, or .s3t file designation (RPC is default) CHAN - channel number of the channel file to extract (uses first channel if left blank) TOTIM - total time of the signal used to create the x-value time points - if left blank the time points

from the actual channel file are used PUNCH - set to YES to place the TABLED1 entries produced in the punch file xii,xji - these are value ranges to extract or exclude from the internally produced TABLED1 - to

exclude, set the UID to a negative number

MSC Patran 2020 now supports this feature in the following way:

Open the Load Case application Set the Action to Create or Modify Select the Load Case of interest (or create a new one) Set it to Time Dependent - press Apply Open the Loads/BCs application Set the Object to the load type of interest, i.e., Force

1 2 3 4 5 6 7 8 9 10TABLRPC TID XAXIS YAXIS UID TYPE CHAN TOTIM PUNCH

xi1 xj1 xi2 xj2 xi3 xj3 -etc.- "ENDT "

15Chapter 2: General EnhancementsNastran Dynamic Analysis Using Channel Files

Make sure the Current Load Case is the time dependent load case you created Open the Input Data form Enter some non-zero values as you normally would for a typical LBC Turn on the Use Channel File toggle Enter a Channel # or leave blank to use first channel Put focus in the Time/Freq. Dependence data box Select the Channel File from the list box

At this point the data box fills with a coded string that looks like: c:: where c: designates that this is a channel file, is the designated channel number, and is the selected file name. When you press Apply, a general field is created with this information. On restoration of an LBC, the field is read and the data box containing this information is once again filled with the select channel file information.

On translation a TABLRPC entry is created along with its corresponding UDNAME entry to designate the channel file, channel number, and file type.

Limitation:

• The channel files must be located in the Patran working directory

• The XAXIS/YAXIS setting is always set to LINEAR (default)

• If you wish to produce the TABLED1 entries, designate a negative channel number - this triggers the translation to write PUNCH=YES

• It is not possible to set the xii,xij y-values ranges for inclusion or exclusion when creating the TABLED1

For the unsupported features of TABLRPC, the user must intercept the input file before submission to Nastran and edit the input file with the appropriate settings.

Patran Release GuideNastran Dynamic Analysis Using Channel Files

16

Figure shows mechanism to use a channel file for dynamic loading.

On import of a Nastran input deck with TABLRPC entries, one can expect the LBC to be created with the dynamic, time dependent loading restored in this manner:

If only the channel file, channel number, and file type are designated in the TABLRPC entry, then a general field is produced as explained above - a circle test of import/export works in this case only. The channel file name cannot have a path designated.

If any of the unsupported fields of the TABLRPC are present or the file name has a path, then the circle test will not pass. However, the equivalent time-dependent field is created from the internally created TABLED1 entry and associated to the LBC. This is a convenient mechanism if one wishes to actually have the time dependent data (as a non-spatial field) in Patran. Any inclusions or exclusions of the channel file data are also reflected in the imported non-spatial field.

17Chapter 2: General EnhancementsEnhanced HDF5 Results Support

Enhanced HDF5 Results SupportA number of new results are available from the HDF5 database file that can be requested from an MSC Nastran run. Additional results that can now be accessed from Patran include:

Nastran Embedded Fatigue (NEF) stress output requests. Note that for a combination of output requests, the designated code is additive, e.g. STROUT=3 is STROUT=1+2. For all of these requests, the output entities are only those determined, designated, and returned or filtered by the fatigue analysis.

• FATIGUE(STROUT=1) Case Control - this request outputs the actual stress or strain tensor (physical or modal) that is passed to the fatigue analysis. This is comparable to a STRESS or STRAIN output request and is identical if the stress recover parameters are the same.

• FATIGUE(STROUT=2) Case Control - this request outputs the maximum stress or strain range from the scalar stress or strain response history computed by the fatigue analysis. If the stress combination requested is a critical plane analysis, the output is a vector, at the critical angle, transformed into the Patran global coordinate system (Nastran basic system) for elemental results or in the defined surface system for grid point stresses/strains. For other stress/strain combinations, such as von Mises or absolute maximum principal, the output is scalar (meaning the y- and z-direction are zero and only x-direction contains the response).

• FATIGUE(STROUT=4) Case Control - this request outputs the actual scalar stress or strain response history computed by the fatigue analysis, which is used to rainflow cycle count and ultimately compute damage. If the fatigue analysis is a critical plane analysis, the scalar response is that from the critical angle only.

• FATIGUE(STROUT=8) Case Control -this request outputs the actual stress or strain tensor transient responses at the locations requested by the fatigue analysis for SOL 112. This is comparable to a STRESS or STRAIN output request and is identical if the stress recover parameters are the same.

:

Primary Name

Secondary Name Result Type

Associated Data Block

Patran Output Request Nastran Output Request

Stress/Strain Tensor

Screened Tensor OES1FSOES1MS

Fatigue Life w/ Tensor Input

FATIGUE(STROUT=1)

Stress/Strain Range Vector OEFTG Fatigue Life w/ Max Range Vector Output

FATIGUE(STROUT=2)

Response :

Scalar OEFTGRH Fatigue Life w/ Combined Response History

FATIGUE(STROUT=4)

Stress/Strain Tensor

Screened Tensor OES1FS Fatigue Life w/ Tensor Response History

FATIGUE(STROUT=8)

Patran Release GuideEnhanced HDF5 Results Support

18

This is a plot of 2nd-mode modal stress contribution to a fatigue analysis using modal transient (SOL 112) solution. This plot is comparable to a STRESS output request if all stress recovery parameters are the same. This plot is of von Mises for visualization; all six tensor components for all modes are passed to the fatigue analysis and can be visualized with STROUT=1. For a SOL 101 analysis, these are the physical stresses for each SUBCASE. For SOL 112 they are the modal stresses for each mode. The result type name is Screened because the result set only contains the elements analyzed and returned by the fatigue analysis. This is simply a mechanism to return stress results at only the locations of interest based on the fatigue analysis results and to verify the stress input to the fatigue analysis.

19Chapter 2: General EnhancementsEnhanced HDF5 Results Support

These are plots of the maximum stress range vector determined by a critical plane analysis using STROUT=2 from a fatigue analysis. Vectors are plotted in the Patran global (Nastran basic) system for element center and element nodal results. For grid point stresses, the vectors are in the designated surface system (Patran global or Nastran basic system by default). These types of plots can be useful in determining where and in which direction strain gauges can or should be applied for testing purposes. The maximum stress range is determined from the scalar response history computed by the fatigue analysis at each entity and for each angle in the case of critical plane analysis.

Patran Release GuideEnhanced HDF5 Results Support

20

This plot shows the fatigue life of a duty cycle (multi-event) analysis and the actual scalar response history for one of the events at the most critical location from which damage is computed after rainflow cycle counting. Damage from each event is summed to compute the total damage as shown in the plot. The response histories are available for plotting when STROUT=4 is selected. The number of entities should be limited when requesting scalar response histories because this can/will produce a lot of data.

21Chapter 2: General EnhancementsEnhanced HDF5 Results Support

Finally, this is a plot of transient stress tensor (reduced to von Mises) from a modal transient (SOL 112) solution at the critical location. This plot is comparable to a STRESS output request if all stress recovery parameters are the same. The result type name is Screened because the result set only contains the elements analyzed and returned by the fatigue analysis. This is simply a mechanism to recover the stresses only at the locations of interest based on the fatigue analysis results.

Patran Release GuideMSC Fatigue Enhancements

22

MSC Fatigue EnhancementsThe MSC Fatigue 2020 release includes an update of the third party code libraries. This update contains the following enhancements:

Dependency on Python is removed for material curve plotting, supported for standard materials. MSC Fatigue 2020 in the vibration load provider ComplexAlgorithm=Exact was made the default

option instead of ComplexAlgorithm= Fast. This improves the result accuracy of vibration fatigue compared to previous versions.

Additionally, the following issues have been fixed in MSC Fatigue 2020:

SN analysis (SN analysis with certain settings results in a software termination). Critical SineOnRandom issue. Critical Multi PSD vibration issues.

MSC.Fatigue Quick Start Guide

I n d e xPatran Release Guide

Index

AAbaqus, 7ACIS, 5ANSYS, 7

CCAD Access, 5CATIA, 5channel files, 14critical plane, 11

DDAC files, 14DBALL, 7dynamic analysis, 14Dytran, 7

Eenhancements, 2

Ffatigue, 7, 11, 22Flightloads, 7FTGDEF, 11FTGPARM, 11

HHardware, 3HDF5, 7HDF5 Support, 17highlights, 2

IIGES, 5

Kkey highlights, 2

Llimitations, 5LS- DYNA3D, 7

MMarc, 7MASTER, 7MSC Fatigue, 7, 22multi-channel files, 14

NNastran, 7, 11NEF, 11

OOperating systems, supported, 3output requests, 13Output2, 7

PPAMCRASH, 7Parasolid, 5Pro/ENGINEER, 5Punch file, 15

Rresults, 13, 17RPC files, 14

SS3T files, 14Sinda, 7Solid Works, 5STEP, 5STROUT, 13, 17Supported OS levels/Hardware Platforms, 3

Patran Release Guide

24

TTABLED1, 14TABLRPC, 14Thermal, 7

UUnigraphics, 5

XXDB, 7

ContentsChapter 1: Patran 2020 at a GlanceKey HighlightsGeneral Enhancements

Supported OS/Hardware PlatformsSupported CAD AccessKnown limitations in current release:

Supported Analysis PreferencesTechnical Support

Chapter 2: General EnhancementsNastran Embedded Fatigue (NEF) SupportNastran Dynamic Analysis Using Channel FilesEnhanced HDF5 Results SupportMSC Fatigue Enhancements