Design Constraint
Description: Defines a design constraint used in design optimization analysis.
Format:
Example:
| Field | Definition | Type | Default |
|---|---|---|---|
| DCID | Design constraint identification number. | Integer > 0 | Required |
| RID | DRESP1 entry identification number. | Integer > 0 | Required |
| LALLOW | Lower bound of the response quantity. | Real > 0.0 | See Remark 3. |
| UALLOW | Upper bound of the response quantity. | Real > 0.0 | See Remark 3. |
| UADJUST | Adjustable bound option, one of the following character variables: YES or NO. See Remark 5. | Character | NO |
Remarks:
- The DCONSTR entry may be selected in the Case Control Section by the DESSUB or DESGLB command.
- DCID may reference a DCONADD Bulk Data entry.
- Either LALLOW or UALLOW or both must be specified.
- The units of LALLOW and UALLOW must be consistent with the referenced response defined on the DRESP1 entry.
- UADJUST is currently only available when the referenced DRESP1 specifies a FRMASS response. When set to ON, the upper bound will increase as required to bring other design or manufacturing constraints within their respective bounds when it is determined that without an adjustment the solution will not converge. Additionally, the upper bound will decrease when a sufficient margin exists between the upper bound and PARAM, TOPTMINADJVF, provided all other constraints are passing. See Section 5, Parameters, for more information on TOPTMINADJVF .