Default damping in Optistruct

Altair Forum User

Hi,

does Hypermesh use a default damping factor for harmonic analysis if I don't manually set one?

I need to compare another frequency response without damping and I need to know if the response obtained with Optistruct has or hasn't damping in it.

Thank you

Altair Forum User

Hi @Simonec

 

HyperMesh/OptiStruct does not have any default values. All are user defined values. 

 

You can introduce uniform structural damping using Control Cards>> PARAM>> G.

 

Where G is 2*Critical damping ratio (C/C0)