2.5. Determine Objective and Constraints Capabilities

Objective and Response Constraint Capability Map

The options for the Objective and Response Constraint object depend upon the analysis you are optimizing, the response constraint you want to specify, and the optimization method you are using. Review the following table to see which Objective and Response Constraint objects are available for each method, noting the following:

  • Constraint/Objective (C/O): Supported as Response Constraint and Objective.

  • C: Supported as a Response Constraint only.

  • O: Supported as a Objective only.

Upstream Analysis System?ResponseDensity MethodLattice MethodLevel Set MethodShape Optimization MethodMixable DensityTopography
Geometric (default) YYYYY Y
Mass/Volume[a] C/O C/O C/O C/O C/O C/O
Center of Gravity[a] C C C C C  
Moment of Inertia[a] C C C C C  
User Defined Criterion  C/OC/OC/OC/O
       
Harmonic Response[b]Upstream analysis supported? No No Yes Yes Yes Yes
User-defined Criterion  C/OC/OC/OC/O
       
Static Structural System Upstream analysis supported? Yes Yes Yes Yes Yes Yes
Compliance[c] C/O C/O C/O C/O C/O C/O
Displacement[a] C C C C   
Stress C/O C/O C/O C/O C/O 
Local Stress C      
Reaction Force[a] C   C C   
User-defined Criterion C/O C/O C/O C/O C/O
       
Nonlinear Static Structural System - (Nonlinear Contact only) [d] Upstream analysis supported? Yes (Beta) NoNo Yes Yes No
Compliance C/O      
Displacement C      
Stress C/O      
Local Stress C      
Reaction Force C      
User-defined Criterion      
Accumulated Plastic Strain (APS)    O   
       
Nonlinear Static Structural [d] Upstream analysis supported? NoNoNo Yes  No
Accumulated Plastic Strain (APS)    O   
       
Modal Upstream analysis supported? Yes Yes Yes Yes Yes Yes
Frequency[a] C/O C/O C/O C/O   
User-defined Criterion   C/O C/O C/O C/O
       
Steady-State Thermal System Upstream analysis supported? Yes No Yes Yes Yes No
Thermal Compliance O   C/O C/O C/O  
TemperatureC     
       
Nonlinear Steady-State Thermal System (Radiation Only) Upstream analysis supported? Yes NoNoNoNoNo
Thermal Compliance O      
Temperature C      

[a] This response will be deprecated in a future release. Ansys recommends that you use a User Defined Criterion response instead as it is more versatile.

[b] The Structural Optimization analysis only supports an upstream standalone MSUP Harmonic Response analysis.

[c] The application ignores Condensed Part objects included in the model when computing compliance.

[d] To specify a nonlinear analysis, set Large Deflection property to On in the Details of the Solver Controls category of the Analysis Settings.