Learning Forum

[Dennis Chen]

Hello, I want to inquire about how to do a damped modal analysis for a part that's made from a viscoelastic material (elastic + prony series terms).

Viscoelastic material has an inherent frequency dependent damping so the question is really about how I can properly define mode dependent damping ratio from these prony series terms?  If this thought process is incorrect, how else can we do this?

[Erik Kostson]

 

 

 

Hi Dennis

As far as I know this can only be used with full harmonic analysis.

The viscoelastic model is a material input (you might need to measure these constants),  and then input the material data

All the best

Erik