Supported Optimization Type Chart

OptiStruct supports topology, shape, size, free-shape, free-size and topography optimization for almost all analysis sequences. The supported responses for each analysis type are listed in the subsequent tables.

Each optimization type is associated to a specific table which outlines supported responses types.

Analysis Type	Response Type
BUCK (Eignevalue of a buckling model)	Optimization Type Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Unsupported Free size Unsupported Topography Supported
DFREQ	Refer to DFREQ
DFOUR	Unsupported
DTRAN (Transient displacement)	Optimization Type Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Unsupported Free size Unsupported Topography Unsupported
FATIGUE	Refer to FATIGUE
HEAT (Thermal Linear Static Analysis)	Refer to HEAT
HEAT (Thermal Linear Transient Analysis)	Unsupported
MCEIG	Unsupported
MFOUR	Unsupported
MFREQ	Refer to MFREQ
MODES	Refer to MODES
MTRAN	Refer to MTRAN
NLHEAT (Thermal Nonlinear Static Analysis)	Unsupported
NLHEAT (Thermal Nonlinear Transient Analysis)	Unsupported
NLSTAT (gap/contact)	Refer to NLSTAT (gap/contact)
NLSTAT (elasto-plasticity)	Refer to
RANDOM	Refer to RANDOM
STATIC (mechanical)	Refer to STATIC
Subcase Independent Analysis Type	Refer to Subcase Independent Responses

STATIC

Here various subcase dependent responses for linear static analysis (STATIC) are outlined.

Supported Responses	Optimization Type
CFAILURE	Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Supported Topography Supported
CNTF	All types supported
CNTP	All types supported
CSTRAIN	Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Supported Topography Supported
CSTRESS	Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Supported Topography Supported
DISP	All types supported
FAILURE	All types supported
FORCE	All types supported
GPFORCE	All types supported
GPSTR	Topology Supported Size (parameter) Unsupported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Unsupported Topography Supported
GSKP	All types supported
RESFORCE	All types supported
SECTION	All types supported
SPCFORCE	All types supported
STRAIN	All types supported
STRESS	All types supported

NLSTAT (gap/contact)

Here various subcase dependent responses for nonlinear static analysis (NLSTAT) (gap/contact) are outlined.

Supported Responses	Optimization Type
CFAILURE	Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Supported Topography Supported
CNTF	All types supported
CNTP	All types supported
CSTRAIN	Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Supported Topography Supported
CSTRESS	Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Supported Topography Supported
DISP	All types supported
FAILURE	All types supported
FORCE	All types supported
GPFORCE	All types supported
GPSTR	Topology Supported Size (parameter) Unsupported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Unsupported Topography Supported
GSKP	All types supported
RESFORCE	All types supported
SPCFORCE	All types supported
STRAIN	All types supported
STRESS	All types supported

NLSTAT (elasto-plasticity)

Table 1. Here various subcase dependent responses for nonlinear static analysis (NLSTAT) (elasto-plasticity) are outlined.
Supported Responses	Optimization Type
DISP	Shape, Classic free shape and Grid-based free shape suppported
STRAIN (Equivalent Plastic Strain)	Shape, Classic free shape and Grid-based free shape suppported

MODES

Here various responses for normal modal analysis (MODES) are outlined.

Supported Responses	Optimization Type
FREQ	All types supported
mode shapes	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Unsupported Free size Supported Topography Supported

DFREQ

Here various responses for direct frequency response analysis are outlined.

Supported Responses	Optimization Type
FRDISP	Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Unsupported Topography Unsupported
FRSTRS	Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Unsupported Topography Unsupported
FRFORC	Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Unsupported Topography Unsupported
FRSTRN	Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Unsupported Topography Unsupported
FRYELO	Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Unsupported Topography Unsupported
FRACCL	Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Unsupported Topography Unsupported
FRPRES	Topology Unsupported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Supported Free size Unsupported Topography Unsupported

MFREQ

Here various responses for modal frequency response analysis (MFREQ) are outlined.

Supported Responses	Optimization Type
FRACCL	All types supported
FRDISP	All types supported
FRFORCE	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Supported Grid-based free shape Supported Free size Unsupported Topography Supported
FRPRES	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Supported Free size Supported Topography Supported
FRSTRESS	All types supported
FRSTRN	All types supported
FRVELO	All types supported
FRFERP	All types supported

HEAT

Here various responses for Thermal Linear Static Analysis (HEAT) are outlined.

Supported Responses	Optimization Type
TCOMP	All types supported
TEMP	All types supported
FLOWPRES	Only Topology supported (Darcy Flow)

ELEC

Here various responses for Linear Steady-State Electric Conduction (SSEC) are outlined.

Supported Responses	Optimization Type
ELCOMP	All types supported
ELPOT	All types supported

MTRAN

Here various responses for modal linear transient response analysis (MTRAN) are outlined.

Supported Responses	Optimization Type
TDISP	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Unsupported Free size Unsupported Topography Unsupported
TMDISPD	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Unsupported Free size Unsupported Topography Unsupported
TRCOMP	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Unsupported Free size Unsupported Topography Unsupported

FATIGUE

Here various responses for fatigue analysis (FATIGUE) are outlined:

Supported Responses *	Optimization Type
FATIGUE	All types supported
GPFAT	All types supported

* Topology and Free-size: Fatigue responses are not defined on the DRESP1 card. They are defined on DTPL and DSIZE.

RANDOM

Here various subcase dependent responses for random response analysis (RANDOM) are outlined.

Supported Responses *	Optimization Type
PSDACCL	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Supported Free size Supported Topography Supported
PSDDISP	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Supported Free size Supported Topography Supported
PSDPRES	All types supported
PSDSTRN	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Supported Free size Unsupported Topography Supported
PSDSTRS	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Supported Free size Unsupported Topography Supported
PSDVELO	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Supported Free size Supported Topography Supported
RMSACCL	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Supported Free size Supported Topography Supported
RMSDISP	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Supported Free size Supported Topography Supported
RMSPRES	All types supported
RMSSTRN	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Supported Free size Unsupported Topography Supported
RMSTRS	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Supported Free size Unsupported Topography Supported
RMSVELO	Topology Supported Size (parameter) Supported Shape Supported Classic free shape Unsupported Grid-based free shape Supported Free size Supported Topography Supported

* Topology, Free-size, and Topography: These response types are supported for random response analysis based on modal frequency response analysis only; they are not supported for random response analysis based on direct frequency response analysis.

Subcase Independent Responses

Here various subcase independent responses are outlined.

Supported Responses	Optimization Type
BEADFRAC	Topology Unsupported Size (parameter) Unsupported Shape Unsupported Classic free shape Unsupported Grid-based free shape Unsupported Free size Unsupported Topography Supported
CG	All types supported
MASS	All types supported
MASSFRAC	Topology Supported Size (parameter) Unsupported Shape Unsupported Classic free shape Unsupported Grid-based free shape Unsupported Free size Supported Topography Unsupported
MOI	All types supported
VOLFRAC	Topology Supported Size (parameter) Unsupported Shape Unsupported Classic free shape Unsupported Grid-based free shape Unsupported Free size Supported Topography Unsupported
VOLUME	All types supported