PARAM, RBMEIG

Bulk Data Entry Defines the cut-off eigenvalue for determining rigid body modes calculated by AMLS.

Parameter Values Description
RBMEIG <Value, AUTO>

<Real>

No default

 PARAM, RBMEIG defines the cutoff eigenvalue for determination of rigid body modes calculated by the AMLS and AMSES eigensolvers.

Comments

  1. PARAM, RBMEIG functions in a similar manner to PARAM, FZERO, which is used in models solved by the Lanczos eigensolver.
  2. The default cutoff eigenvalue of 1.0 is equivalent to a natural frequency of 0.16 Hz.
  3. For the Lanczos eigensolver, use PARAM, FZERO to set the cutoff frequency for rigid body modes.