Design Response
Description: Defines a structural response used in design optimization analysis either as a constraint or an objective.
Format:
Example:
| Field | Definition | Type | Default |
|---|---|---|---|
| ID | Design response identification number. | Integer > 0 | Required |
| LABEL | User-defined label. | Character | |
| RTYPE | Response type. See table below. | Character | Required |
| REGION | Topology design region identification number. See Remark 2. | Integer > 0 or blank | All TOPVAR regions |
| ATTA, ATTB, ATTC | Response attributes. See table below and Remark 4. | Integer > 0 or Real or Blank |
| Response Type | Description | Response Attributes | ||
|---|---|---|---|---|
| RTYPE | ATTA (Integer > 0) | ATTB (Integer > 0) | ATTC (Integer > 0) | |
| FRMASS | Mass or volume fraction. | Blank | Blank | Blank |
| COMP | Compliance. | Blank | Blank | Blank |
| DISP | Displacement. | Component Number (1 - 6) | Blank | Grid Identification Number |
| SPCFORCE | Single point constraint force. | Component Number (1 - 6) | Blank | Grid Identification Number |
| GLBSTRS | Global stress. | Blank | Blank | Blank |
Remarks:
- DRESP1 identification numbers must be unique.
- REGION is used to specify which design region a constraint is applicable to. It is ignored when RTYPE is set to COMP, DISP, or SPCFORCE. If REGION is zero or blank, all TOPVAR regions will be used for FRMASS, COMP, or GLBSTRS.
- The initial constraint value used for FRMASS is the value specified on the TOPVAR entry.
- For DISP and SPCFORCE the default for ATCC is the grid point with the largest absolute value in the component direction specified. If ATTA is also blank, the component defaults to the direction with the largest absolute value.