DMPSTR

DMPSTR, COEFF
Sets a constant structural damping coefficient.

SOLUTION: Dynamic Options
Compatible Products: – | – | Premium | Enterprise | Ent PP | Ent Solver | –

COEFF

Structural damping coefficient.

Command Default

Use damping as defined by Damping in the Structural Analysis Guide.

Notes

Sets a constant structural (or hysteretic) damping coefficient for use in harmonic (ANTYPE,HARMIC) analyses (FULL, MSUP, and VT) and modal analyses (ANTYPE,MODAL with MODOPT,UNSYM, DAMP or QRDAMP). It is also supported in transient (ANTYPE,TRANS) analyses (full or QRDAMP mode-superposition) as an equivalent viscous damping when an average excitation frequency is specified (DMPSFreq on TRNOPT).

Note that for structures with multiple materials, MP,DMPR can also be used to specify constant structural material damping on a per material basis. Note that if both DMPSTR and MP,DMPR are specified, the damping effects are additive.

Caution:  DMPSTR adds the damping contribution as gK, whereas MP,DMPR adds the contribution on a per-material basis as 2gK. For more information, see Damping Matrices in the Mechanical APDL Theory Reference.

This command is also valid in PREP7.

Menu Paths

Main Menu>Preprocessor>Loads>Load Step Opts>Time/Frequenc>Damping
Main Menu>Solution>Load Step Opts>Time/Frequenc>Damping

Release 18.2 - © ANSYS, Inc. All rights reserved.