| Abaqus Keywords Reference Guide |
|
| How to find keyword examples |
| Abaqus Keywords Reference Guide |
|
| How to find keyword examples |
This option is used to provide global damping factors for the following procedures in Abaqus/Standard:
*STEADY STATE DYNAMICS, DIRECT
*STEADY STATE DYNAMICS, SUBSPACE PROJECTION
Products: Abaqus/Standard Abaqus/CAE
Type: History data
Level: Step
Abaqus/CAE:
Set this parameter equal to the 
factor to create global Rayleigh mass proportional damping 
, where 
denotes the model mass matrix. The default is ALPHA=0. (Units of T–1.)
Set this parameter equal to the 
factor to create global Rayleigh stiffness proportional damping 
, where 
denotes the model stiffness matrix. The default is BETA=0. (Units of T.)
Set FIELD=ACOUSTIC to apply the global damping only to the acoustic fields in the model.
Set FIELD=ALL (default) to apply the global damping to all of the valid displacement, rotation, and acoustic fields in the model.
Set FIELD=MECHANICAL to apply the global damping only to the valid displacement and rotation fields in the model.
This parameter is not supported in a mode-based steady-state dynamic analysis that uses coupled acoustic-structural modes.
Set this parameter equal to the 
factor to create frequency-independent stiffness proportional structural damping 
, where 
denotes the model stiffness matrix. The default is STRUCTURAL=0.