MODEWEIGHT
Subcase Information Entry The MODEWEIGHT command can be used to define a multiplier for computed eigenvalues that are to be used in the calculation of the "weighted reciprocal eigenvalue" and "combined compliance index" optimization responses.
Format
MODEWEIGHT (mode) = weight
Definitions
| Argument | Description |
|---|---|
| mode | Mode number. If a mode number is not provided, OptiStruct will terminate with an error. No default (0 < Integer < highest calculated mode) |
| weight | The multiplier to be used
for the corresponding mode in the calculation of "weighted
reciprocal eigenvalue" or "combined compliance index." Default = 1.0 (Real) |
Comments
- Modes for which there is no MODEWEIGHT definition are not included in the calculation of the "weighted reciprocal eigenvalue" and "combined compliance index" optimization responses.
- Refer to Responses in the User Guide for more information on "weighted reciprocal eigenvalue" and "combined compliance index" optimization response calculations.
- MODEWEIGHT is only used in conjunction with DRESP1, RTYPE = WFREQ, COMB.
- If MODEWEIGHT is not defined,
but a DRESP1 with RTYPE =
WCOMP exists, the following default is applied:
- MODEWEIGHT(1) = 1.0 in most cases for topology optimization.
- MODEWEIGHT(7) = 1.0 if SPC is not defined for the subcase, EIGRL does not define a V1 > 0.0, and it is solving for more than 6 modes or all modes below an upper bound.
- This entry is represented as an optimization response in HyperMesh.