Supported Optimization Type Chart

Supported types of optimization for various analysis sequences are outlined.

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
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

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

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

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