| Description | Type | Default |
|---|---|---|
|
Subspace eigensolver option to specify how rigid body motion is detected and handled. The default AUTO value will automatically detect any rigid body motion and extract rigid body mode shapes. When set to FORCED, directions specified on the SUPORT entry corresponding to the first six modes will be replaced with exact zero eigenvalues and rigid eigenvectors. All unconstrained directions should be specified on the SUPORT entry when this option is used. When set to OFF, the structure is assumed properly constrained and free of any rigid body motion. |
FORCED/ OFF/ AUTO |
AUTO |