Design Variable Property Relationships

Design variable property relationship entities define relationships between design variables and properties for optimization problems.

Design variable property relationships do not have a display state in the modeling window.

Nastran Cards

Card	Description
DVCREL1	Defines the relation between a connectivity property and design variables. Note: Generic Property
DVCREL2	Defines the relation between a connectivity property and design variables with a user-supplied equation.
DVMREL1	Defines the relation between a material property and design variables.
DVMREL2	Defines the relation between a material property and design variables with a user-supplied equation.
DVPREL1	Defines the relation between an analysis model property and design variables. Note: Generic Property
DVPREL2	Defines the relation between an analysis model property and design variables with a user-supplied equation. Note: Function Property

OptiStruct Cards

Card	Description
DVCREL1	Linearly relates a design variable to an analysis model element property using the equation: ${MP}_{i} = C_{0} + \sum_{i} {COEF}_{i} \cdot {DVID}_{i}$ CBAR, CELAS2, CELAS4, CMASS2, CMASS4, CDAMP2, CDAMP4, CONM1, CONM2, CONROD, CQUAD4, CTRIA3, CQUAD8, CTRIA6 elements can be selected. Note: Bulk Data Entry
DVCREL2	Relates design variables to an analysis model element property using a relationship defined by a DEQATN card. The equation inputs come from the referenced DESVAR values and constants defined on a DTABLE card. CBAR, CELAS2, CELAS4, CMASS2, CMASS4, CDAMP2, CDAMP4, CONM1, CONM2, CONROD, CQUAD4, CTRIA3, CQUAD8, CTRIA6 elements can be selected. Note: Bulk Data Entry
DVLREL1	Linearly relates a design variable to an analysis model element.
DVLREL2	Relates a design variable to an analysis model loading using a relationship defined by a DEQATN card. The equation inputs come from the referenced DESVAR values and the constants defined on the DTABLE card.
DVMREL1	Linearly relates a design variable to an analysis model material property using the equation: ${MP}_{i} = C_{0} + \sum_{i} {COEF}_{i} \cdot {DVID}_{i}$ MAT1, MAT2, MAT8 and MAT9 materials can be selected. Note: Bulk Data Entry
DVMREL2	Relates design variables to an analysis model material property using a relationship defined by a DEQATN card. The equation inputs come from the referenced DESVAR values and constants defined on a DTABLE card. MAT1, MAT2, MAT8 and MAT9 materials can be selected. Note: Bulk Data Entry Requires a dequation definition.
DVPREL1	Linearly relates a design variable to an analysis model property using the equation: $P_{i} = C 0 + \sum_{i} {COEF}_{i} * {DDVI}_{i}$ PBAR, PBARL, PBEAM, PBEAML, PBUSH, PCOMP, PCOMPG*, PCOMPP, PDAMP, PELAS, PMASS, PROD, PSHEAR, PSHELL, PVISC properties and PLY entities can be selected. Note: Bulk Data Entry For PCOMPG, either global plies or property specific plies may be selected.
DVPREL2	Relates a design variable to an analysis model property using a relationship defined by a DEQATN card. The equation inputs come from the referenced DESVAR values and the constants defined on the DTABLE card. PBAR, PBARL, PBEAM, PBEAML, PBUSH, PCOMP, PCOMPG*, PCOMPP, PDAMP, PELAS, PMASS, PROD, PSHEAR, PSHELL, PVISC properties and PLY entities can be selected. Note: Bulk Data Entry Requires a dequation definition. For PCOMPG, either global plies or property specific plies may be selected.