Damping coefficients at OS-T: 1310 Direct Transient Dynamic Analysis of a Bracket

Boris_22428

Hello Everybody

I am trying to do the transient analysis, similar to this OptiStruct 2020 tutorial:

OS-T: 1310 Direct Transient Dynamic Analysis of a Bracket.

I can’t understand in this tutorial, how exactly these two values were selected:

Uniform structural damping coefficient -  G_V1  (0.2)

And conversion to equivalent viscous damping  -  W3_V1 (300)

Modal analysis of this part, guides and references did not help much.

I would be very grateful for any tip, on this or similar example, the best, if also analytic solution will be available for verification.

Thank you in advance!

Boris

PrasannaK

Hi Boris,

Attaching the video tutorial link for reference : 

Direct Transient Dynamic Analysis in Altair OptiStruct

Thank You!

Boris_22428

Dear Prasanna

Thank You for your reply

in this video, (at 3:30) shown as these 2 coefficients are entered:

but how exactly they are chosen ?

Thanks again

Boris