M. To assign a composite damping ratio

To assign a damping ratio to a model selection, use the following procedure.

This method assigns a composite damping ratio by a material constant.

Note: If you assign a material definition to members, elements, or solids, then the critical damping ratio for that material will be used.

On the Specifications ribbon tab, select the Constants > Damping Ratio tool in the Materials group.

The Material Constant - Damping Ratio dialog opens.

Select either:

the Enter Value option and then type the composite damping ratio value (must be between 0.001 and 0.99)

one of the three predefined materials: Aluminum, Concrete, or Steel

Material name	Composite damping ratio value
Aluminum	0.03
Concrete	0.05
Steel	0.03