Using the Damping subnode, you can add damping to the material model. Damping can be used in Time Dependent, Eigenfrequency, and Frequency Domain studies; for other study types, the settings in the
Damping subnode are ignored.
In this damping model, the damping parameter ξ is expressed in terms of the mass
m and the stiffness
k as
Select Input parameters —
Alpha and beta — to enter the damping parameters explicitly, or
Damping ratios to derive the damping parameters from the damping ratio at two frequencies.
When Alpha and beta is selected, enter values or expressions for the
Mass damping parameter αdM and the
Stiffness damping parameter βdK.
When Damping ratios is selected, enter two pairs of frequencies,
f1 and
f2, and the corresponding damping ratios
ζ1 and
ζ2 at these frequencies. The Rayleigh damping parameters are then computed as
Physics Tab with a Linear Elastic Material node selected in the model tree:
Attributes>Damping