Mapdl.rock(cgx='', cgy='', cgz='', omx='', omy='', omz='', **kwargs)

Specifies a rocking response spectrum.

APDL Command: ROCK

cgx, cgy, cgz

Global Cartesian X, Y, and Z location of center of rotation about which rocking occurs.

omx, omy, omz

Global Cartesian angular velocity components associated with the rocking.


Specifies a rocking response spectrum effect in the spectrum (ANTYPE,SPECTR) analysis.

The excitation direction with rocking included is not normalized to one; rather, it scales the spectrum. For more information, see Participation Factors and Mode Coefficients.

This command is also valid in PREP7.