Constraint

Use the Constraint PropertyManager to define constraints in the active optimization study. A constraint defines the condition that the optimized design must satisfy. You can define up to 60 constraints in an optimization study.

Response

• Analysis Type. Select the analysis of the constraint quantity. You can choose Static, Frequency, Buckling, or thermal.

• Study Association . Select  a study from the list. The program runs the select study in each experiment of the optimization process to calculate the constraints.

• Result Type. Select the result type of the constraint.:

• If you selected Static as the Analysis Type, you can choose from: Nodal Stress, Elemental Stress, Displacement, and Strain.

• If you selected Frequency or Buckling as the Analysis Type, you can set only the Mode Shape.

• If you selected Thermal as the Analysis Type, you can choose from the thermal result components listed under Component.

• Component. Select the result component::

• If you selected Static as the Analysis Type, available components depend on the Result Type:

• If you selected Nodal Stress as the Result Type, you can choose from: Von Mises stress, Normal Stresses (SX, SY, and SZ), Shear Stresses (TXY, TXZ, and TYZ), Normal Stresses (P1, P2, and P3), and Stress Intensity (INT).

• If you selected Elemental Stress as the Result Type, you can choose from: Von Mises stress, Normal Stress components (SX, SY, and SZ), Shear Stress components (TXY, TXZ, and TYZ), Normal Stress components (P1, P2, and P3), Stress Intensity (INT), and Energy norm error (ERR).

• If you selected Displacement as the Result Type, you can choose from: displacement components (UX, UY, and UZ) and Resultant Displacement (URES).

• If you selected Strain as the Result Type, you can choose from: Normal Strain components (EPSX, EPSY, and EPSZ), Shear Strain components (GMXY, GMXZ, and GMYZ), Equivalent Stress (ESTRN), Strain Energy Density (SEDENS), Total Strain Energy (ENERGY), and Normal Strain components (E1, E2, and E3).

• If you selected Thermal as Analysis Type, you can choose from: nodal temperature (TEMP), temperature gradient in the X, Y, and Z direction (GRADX, GRADY, and GRADZ), resultant temperature gradient (GRADN), heat flux in the X, Y, and Z direction (HFLUXX, HFLUXY, and HFLUXZ), and the resultant heat flux (HFLUXN).

• If you selected Frequency or Buckling as the Analysis Type, you can set only the Mode Shape.

Bounds

• Units . Select the units you want to use to enter the upper and lower bounds of the select result component.

• Lower Bound. Enter the lowest allowable value for the result component.

• Upper Bound. Enter the highest allowable value for the result component.

To define constraints...

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