mdamp

DynamicOptions.mdamp(stloc='', v1='', v2='', v3='', v4='', v5='', v6='', **kwargs)

Defines the damping ratios as a function of mode.

Mechanical APDL Command: MDAMP

Parameters:

stlocstr

Starting location in table for entering data. For example, if STLOC = 1, data input in the V1 field applies to the first constant in the table. If STLOC = 7, data input in the V1 field applies to the seventh constant in the table, etc. Defaults to the last location filled + 1.

v1str

Data assigned to six locations starting with STLOC. If a value is already in this location, it will be redefined. Blank values for V2 to V6 leave the corresponding previous value unchanged.

v2str

Data assigned to six locations starting with STLOC. If a value is already in this location, it will be redefined. Blank values for V2 to V6 leave the corresponding previous value unchanged.

v3str

Data assigned to six locations starting with STLOC. If a value is already in this location, it will be redefined. Blank values for V2 to V6 leave the corresponding previous value unchanged.

v4str

Data assigned to six locations starting with STLOC. If a value is already in this location, it will be redefined. Blank values for V2 to V6 leave the corresponding previous value unchanged.

v5str

Data assigned to six locations starting with STLOC. If a value is already in this location, it will be redefined. Blank values for V2 to V6 leave the corresponding previous value unchanged.

v6str

Data assigned to six locations starting with STLOC. If a value is already in this location, it will be redefined. Blank values for V2 to V6 leave the corresponding previous value unchanged.

Notes

Defines the damping ratios as a function of mode. Table position corresponds to mode number. These ratios are added to the dmprat value, if defined. Use the stat command to list current values. This command applies to mode-superposition harmonic ( antype,HARMIC), mode- superposition linear transient dynamic ( antype,TRANS), and spectrum ( antype,SPECTR) analyses. Repeat the mdamp command for additional constants (10000 maximum).

mdamp can also be defined in a substructure analysis that uses component mode synthesis. The damping ratios are added on the diagonal of the reduced damping matrix, as explained in Component Mode Synthesis (CMS)

This command is also valid in PREP7.