The Ansys Innovation Space website recently experienced a database corruption issue. While service has been restored there appears to have been some data loss from November 13. We are still investigating and apologize for any issues our users may have as a result.

Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › Damping in transient analysis › Reply To: Damping in transient analysis

October 30, 2023 at 9:30 am
Erik Kostson
Ansys Employee

 

See that discussion Peteroznewman explains what Ansys does when you give a frequency of interest (say the freq. of your dominant mode of interest that will be excited – frequency_given) and a damping ratio (damp_ratio_given).

As he says, it calculates 
beta = (2*damp_ratio_given)/(2*PI*frequency_given).

You can check that in Ansys yourself, by giving freq. = 20 Hz, damping ratio = 0.01, then Ansys will give a beta as =

0.000159

All the best, and perhaps some other forum members can give some more feedback, but the post and this should explain (also see some more material on the internet about Rayleigh damping.

Erik