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General Mechanical

General Mechanical

Topics related to Mechanical Enterprise, Motion, Additive Print and more.

[Spectrum analysis] How to correctly apply damping ?

    • jean.collomb
      Subscriber

      Hi,

      I am currently doing a spectrum analysis and I am comparing two methods:

      1. First, I use an existing APDL script ;
      2. Then, I try to do the same with Workbench Mechanical.

      In the APDL script, I have 2 commands for damping :

      1. DMPRAT : where my damping coefficient is implemented ;
      2. SV : where my damping coefficient and my spectrum is implemented.

      However, when I use Workbench Mechanical, in the spectrum system, I implement the damping coefficient. But when I look at the file.dat, I only see the damping coefficient in the DMPRAT command. The SV command contain spectrum values, but not the damping coefficient.

      When I compare results between these two methods, I obtain different results (due to the damping I suppose).

      My questions is:

      1. When I want to implement damping in a spectrum analysis (in Ansys Classic ou Workbench Mechanical), which command should I use ? (DMPRAT, SV, both ?)

      Thanks for your answer,

      Regards,

      Jean

       

    • danielshaw
      Ansys Employee

      How are you applying damping in Mechanical?

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