1 Reply Latest reply on May 13, 2015 5:17 PM by Jared Conway

    How to interpret random vibration results?

    Michael Villavecer

      Hey everyone,

       

       

      I'm running a random vibration simulation on a part and I'm not really sure how to interpret the results.

       

       

      After running the simulation, I get the RMS von Mises stress and RMS displacement. The chart shows a maximum displacement of, say, 10 inches. Then when I animate the result, the maximum displacement changes to 3 inches. A similar result happens for stress as well.

       

       

      My question is which result is the accurate one? Or are both accurate, and meant to be interpreted in different ways? I'd appreciate any insight you have on this problem as its been bugging me for a few days. Thanks!

        • Re: How to interpret random vibration results?
          Jared Conway

          please post screenshots of both results

           

          I think you're looking at different frequencies which is why the results are different

           

          random vibration is in the frequency domain, not the time domain. ie random vibration animation isn't "over time" like say a nonlinear or nonlinear dynamic analysis.

           

          there is really good background available in the help, training manual and swx kb.