Parameter

Values

Description

W4

<Real>

Default = 0.0

Used in transient analyses to convert structural damping to equivalent viscous damping.

The damping matrix [B] for transient analysis is assembled from:

where:

is the contribution from damping elements (CDAMP#, CVSIC) and B2GG.

is the overall structural damping coefficient (PARAM, G).

is the frequency of interest in radians per unit time (PARAM, W3) for the conversion of overall structural damping into equivalent viscous damping.

[K]

is the global stiffness matrix.

is the element structural damping coefficient (GE on the MAT# entry).

is the frequency of interest in radians per unit time (PARAM, W4) for the conversion of element structural damping into equivalent viscous damping.

is the element stiffness matrix.