ansys.mapdl.core.Mapdl.spdamp

Mapdl.spdamp(tblno='', curvno='', dampratio='', **kwargs)

Defines input spectrum damping in a multi-point response spectrum analysis.

Mechanical APDL Command: SPDAMP

Parameters:

tblnostr

Input table number. Corresponds to the frequency table number ( TBLNO on the spfreq command).

curvnostr

Input curve number. Corresponds to the spectrum values curve number ( CURVNO on the spval command).

dampratiostr

Damping ratio for the response spectrum curve. Up to 20 different curves may be defined, each with a different damping ratio. Damping values must be input in ascending order.

Notes

Defines multi-point response spectrum damping value to be associated with:

• Previously defined frequency points ( spfreq ).

• Subsequently defined spectrum points ( spval ).

Damping values are used only to identify input spectrum values for the mode coefficients calculation.

The curve number must be input in ascending order starting with 1.

This command is also valid in PREP7.