Control Cards

OptiStruct Keyword

Notes

ACCELERATION

Controls the output of acceleration results.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

ANALYSIS

Flag indicating that only analysis is to be performed (i.e. no optimization), CHECK overrides ANALYSIS.

CHECK

Flag indicating that only a check run is to be performed (i.e. no analysis or optimization). CHECK overrides ANALYSIS.

CSTRAIN

Controls the output of strain results for composite shells.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

CSTRESS

Controls the output of stress results for composite shells.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

DENSITY

Controls the output of density results from a topology or free-size optimization.

DENSRES

Controls the output of density results from a topology or free-size optimization.

DESHIS

Controls the creation of the .hgdata file.

DISPLACEMENT

Controls the output of displacement (and rotation) results.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

DMIGNAME

Defines the name given to the reduced matrices written to an external data file.

ECHO

Controls the echo of input data to the .out or .echo files.

EIGVNAME

Defines the prefix to be used for the saving and retrieval of external eigenvalue data files.

ELFORCE

Controls the output of element force results.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

ESE

Controls the output of element strain energy results.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

FORMAT

Controls the format of results output.

Formats are: H3D (default), HM, FLX, OPTI, OUTPUT2, PUNCH, PATRAN, APATRAN, NONE.

GPFORCE

Controls the output of grid point force results.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

GPSTRESS

Controls the output of grid point stress results (available for PSOLID components only).

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

HISOUT

Controls the contents of the .hgdata file.

INFILE

When using the two-file setup, INFILE indicates the prefix of the file containing the bulk data information. Its extension must be .fem.

LOADLIB

Defines the libraries to be loaded for external responses (DRESP3).

MODEL

Requests output for all formats for only a subset of the model and results.

(This option is intended for multi-body dynamics and transient solution sequences with which users often require results for only a subsection of a model, but it is applied to all solution sequences).

MPCFORCES

Controls the output of MPC force results.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

OFREQUENCY

Defines a set of frequencies at which results are output for frequency response analysis.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

OLOAD

Controls the output of applied force results.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

OTIME

Defines a set of times at which results are output for transient analysis.

OUTFILE

Defines the path to, and the prefix of, the results files output by OptiStruct.

OUTPUT

Controls the frequency and format of results output by OptiStruct.

PROPERTY

Controls the output of the property definitions used in the last iteration of an optimization.

RESPRINT

Controls the output of unretained optimization constraints.

RESTART

Flag that indicates that a restart run is to be performed. Also indicates the prefix of the .sh file to be used as the starting iteration for the restart.

RESULTS

Controls the frequency of output of analytical results during an optimization.

SCREEN

Controls the information echoed to the screen during an OptiStruct run.

SENSITIVITY

Controls the output of responses and sensitivities for size and shape design variables to a Microsoft Excel spreadsheet.

SENSOUT

Controls the frequency of output of responses and sensitivities to a Microsoft Excel spreadsheet.

SET

Creates real number sets, output as SET cards, which may be referenced by the OFREQUENCY or OTIME cards. Integer sets (also SET cards) are supported as entity sets in HyperMesh.

SHAPE

Controls the output of shape optimization results from a shape, topography or free-shape optimization.

SHRES

Controls the frequency of output of the state files (.sh and .grid).

SPCFORCES

Controls the output of single-point force of constraint results.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

STRAIN

Controls the output of elemental strain results.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

STRESS

Controls the output of elemental stress results.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

SUBTITLE

Defines a default subtitle for an OptiStruct model.

Individual subcases may have their own SUBTITLE definitions which are supported on the subcase definition (use the edit button in the subcase panel). These will override the default subtitle.

THICKNESS

Controls the output of thickness results from topology, free-size, or size optimization.

TITLE

Defines a title for an OptiStruct model.

TMPDIR

Defines a temporary directory where scratch files will be written.

OptiStruct allows multiple TMPDIR entries, but only one instance is currently supported in the HyperMesh interface.

VELOCITY

Controls the output of velocity results.

Supported as an output option on the subcase definition when it appears within a subcase. (Use the edit button in the subcase panel).

OptiStruct Matrix Selectors

Notes

B2GG

Identifies a DMIG bulk data entry as a viscous damping matrix.

K2GG

Identifies a DMIG bulk data entry as a stiffness matrix.

K42GG

Identifies a DMIG bulk data entry as a structural element damping matrix.

M2GG

Identifies a DMIG bulk data entry as a mass matrix.

P2G

Identifies a DMIG bulk data entry as a load matrix.

OptiStruct Card

Notes

DTI_UNITS

Defines units for multi-body dynamics and component mode synthesis solution sequences.

GRDSET

Defines defaults for fields 3, 7, and 8 on all GRID entries.

GAPPRM

Defines parameters for gap element connectivity and configuration.

The following GAPPRM arguments are supported: CHKRUN, CKGPDIR, GAPCMPL, GAPGPRJ, HMGAPST, PRTSW, ERRMSG.

PARAM

Defines OptiStruct run parameters.

The following PARAM arguments are supported: AMLS, AMLSNCPU, AUTOSPC, CB2, CHECKEL, CHKGPDIR, CHECKMAT, CK2, CM2, COUPMASS, CP2, DFREQ, EFFMAS, EXPERTNL, EXTOUT, FLEXH3D, FLIPOK, G, GAPOFFSET, INREL, ITAPE, KDAMP, KGRGD, MBDH3D, MODETRAK, POST, PRGPST, REANAL, SHALTER, W3, W4, WTMASS.

If an unsupported argument is encountered on importing a PARAM card, the data is stored as UNSUPPORTED_PARAMS on the PARAM card. It is also possible to create an unsupported PARAM card using the UNSUPPORTED_PARAMS option.

SWLDPRM

Defines parameters for CWELD connectivity search.

The following SWLDPRM arguments are supported: CHKRUN, GSPROJ, PROJTOL, PRTSW, ERRMSG.

HyperMesh Control

Notes

BULK_UNSUPPORTED_CARDS

If a line (not a continuation line) occurs after the BEGIN BULK statement in an input file and starts with a keyword that is not recognized or supported, then the entire card gets written to BULK_UNSUPPORTED_CARDS.

It is also possible to manually define an unsupported bulk data card using the BULK_UNSUPPORTED_CARDS.

BULK_UNSUPPORTED_CARDS are exported near the bottom of the exported OptiStruct input file, just before the ENDDATA statement.

CTRL_UNSUPPORTED_CARDS

If a line (not a continuation line) occurs before the BEGIN BULK statement and before the first SUBCASE statement and starts with a keyword that is not recognized or supported, then the entire card gets written to CTRL_UNSUPPORTED_CARDS.

It is also possible to manually define data cards appearing above the first SUBCASE statement using the CTRL_UNSUPPORTED_CARDS.

CTRL_UNSUPPORTED_CARDS are exported near the top of the exported OptiStruct input file, just before the first SUBCASE statement.

GLOBAL_CASE_CONTROL

This control card handles the data selectors FREQ, METHOD, MPC, SDAMPING and SPC appearing above the first SUBCASE statement.

INCLUDE_BULK

This control card is retained to support old database files.

In version 8.0, it is recommended that the include browser be used for work involving include files.

INCLUDE_CTRL

This control card is retained to support old database files.

In version 8.0, it is recommended that the include browser be used for work involving include files.

Model Documentation

$HMBEGINDOC and $HMENDDOC indicate a section of comment cards which are supported on import to and export from HyperMesh. The comments are stored on control card Model Documentation.

This information is exported at the top of the exported OptiStruct input file.

DEBUG

Some special or custom features can be accessed through the use of 'debug, <string>, <real>' statements.

OSDIAG

Some special diagnostic information can be processed through the use of 'osdiag, <integer>, <integer>, <real>, <real>' statements.