General Mechanical

General Mechanical

Modal analysis in workbench

    • MemoriseXuxu
      Subscriber

      Here I meet a problem about the damping modal in Workbench (ANSYS 18) .


      First,


      how does the software calculate the stiffness coefficient ? I have found some guidance in this link but the result is not correct. 


      Second,


      I follow this public essay and I want to redo what he has done. But he only give the parameter above so I have a doubt that the parameter is enough to calculate. 


      Hopefully I can get your guidance!


      Thanks all guys!

    • sk_cheah
      Subscriber

      Damping ratio is mode dependent. You could try approximating it via the stiffness and mass coefficient. Please see here for some documentation.



      Kind regards,
      Jason

    • MemoriseXuxu
      Subscriber

      But I also need to calculate the parameter using Damping Ratio so that I can calculate the stiffness and mass coefficient. So here the problem is still about the frequency the Ansys defined.Because the frequency above is a range of frequency but not a specific number.

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