Keyword type: model definition
This card is used to define Rayleigh damping for implicit dynamic calculations (*DYNAMIC). There are two required parameters: ALPHA and BETA.
Rayleigh damping is applied in a
global way, i.e. the damping matrix 
![]() is taken to be a linear combination of the
stiffness matrix
 is taken to be a linear combination of the
stiffness matrix 
![]() and the mass matrix
 and the mass matrix 
![]() :
:
| (395) | 
Right now, only one *DAMPING card can be used in the input deck. It applies to the whole model.
First line:
Example: *DAMPING,ALPHA=5000.,BETA=2.e-3
indicates that a damping matrix is created by multiplying the mass matrix with
![]() and adding it to the stiffness matrix multiplied by
 and adding it to the stiffness matrix multiplied by 
![]() 
Example files: beamimpdy1, beamimpdy2.