W3, W4

Description	Type	Default
Frequency of interest for structural damping. The damping matrix for transient analysis is assembled from the equation: In the second equation above, the first term contains terms from viscous damping elements (CDAMP). The second term is structural damping based on the global stiffness matrix multiplied by the overall structural damping coefficient, specified by PARAM, G. The third term is the structural damping matrix created when GE is specified on the MATi entries. The default values of 0.0 for W3 and W4 cause the second and third terms to be ignored regardless of the presence of PARAM, G. The units of W3 and W4 are radians per unit time. See also CB1, CB2.	Real	0.0

Description

Type

Default

Frequency of interest for structural damping. The damping matrix for transient analysis is assembled from the equation:

In the second equation above, the first term contains terms from viscous damping elements (CDAMP). The second term is structural damping based on the global stiffness matrix multiplied by the overall structural damping coefficient, specified by PARAM, G. The third term is the structural damping matrix created when GE is specified on the MATi entries. The default values of 0.0 for W3 and W4 cause the second and third terms to be ignored regardless of the presence of PARAM, G. The units of W3 and W4 are radians per unit time. See also CB1, CB2.

Real

0.0