2 Replies Latest reply on Oct 10, 2013 2:15 AM by Alessandro Tornincasa

    Determining damping capacity of a damper

    Alessandro Tornincasa


      I have a question about non linear dynamic analysis.

      I have a damper like the one shown on attached PDF. There are metal components, and some rubber components, and there is contact.


      Can SolidWorks Simulation predict damping capacity of the damper ?


      A linear dynamic harmonic analysis could give this answer by working in frequency domain.


      In non linear dynamics you work in time domain, and you could get that info by applying an impulsive load and looking at the response of the damper.

      This way you can account for all non linearities (rubber, contact, and so on).


      But would simulation really give you that info ?

      I was thinking about the fact that you have to introduce Raleigh Damping parameters, which you should know by testing the model.

      If I think about that it's like I'm simulating something, but I'm already introducing the answer I'm lloking for in the system (i.e. damping).





        • Re: Determining damping capacity of a damper
          Jared Conway

          if you're designing the damper, i'd agree that our current implementation of nonlinear dynamic won't work. you'd need something like composite modal damping where the material damping is handled individually so that you could determine the damping of the system that you're designing. is it possible in other tools? maybe...not sure. this seems like a pretty complicated problem considering that to get the actual damping behavior out of a part that you've modeled you'd actually have to tell it something about the material structure (atomically..etc) so that it could predict it. Hence why we have inputs for how they behave in general.


          if you're implementing this into a system and want to see how it behaves, instead of doing all the modeling, if you knew how it behaved, you could just use a spring/damper.


          just one other thought. you could make this a series of springs/dampers if you wanted to get an idea of how it worked all together. but then, it probably makes sense to do by hand vs with the software.