Parameter

Values

Description

LOWRANK

<0,-1 or 1>

Default = 0

This parameter is obsolete. Use PARAM, K4METH to control the value of LOWRANK.

PARAM, LOWRANK relates to the faster Modal Frequency Response solution method invoked by PARAM, FASTFR and the FastFRS solution invoked by PARAM, FFRS. LOWRANK is used to select the solution strategy used to handle the modal structural damping matrix.

If LOWRANK is 0, the full eigensolution method is used.

If LOWRANK is -1, a low rank representation of the matrix found in structural damping is used.