Discrete Design Variables

Discrete design variable entities define and store discrete design variables for optimization problems.

Discrete design variables do not have a display state in the modeling window.

Nastran Cards

Card Description
DDVAL Define real, discrete design variable values for discrete variable optimization. Supported as a ddval entity.

OptiStruct Cards

Card Description
DDVAL Define real, discrete design variable values for discrete variable optimization or to define relative rotor spin rates in rotor dynamics.
Note: Bulk Data Entry