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  3. in modal sim, there is a warning. a large number of modes

in modal sim, there is a warning. a large number of modes

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    • May 20, 2024 at 7:48 am
      franklin-zhen.wang
      Subscriber

      But I still need EMM > 80%, so how to setting as the image talk? and if the setting will not influence PSD & SHOCK？

    • May 20, 2024 at 3:42 pm
      dlooman
      Ansys Employee

      This message was created because Mechanical uses a significance level of 0.0 for CQC and ROSE combinations.  This can result in thousands of post1 combinations because every modal cross term is included. The APDL default is 0.001 and could be specified by a commands object like CQC,0.001.   With this setting the combination may not take too long even with >> 100 modes.  I'm familiar with the 80% requirement, but I wonder if it's really necessary if "missing mass" is used to capture the unextracted modes.

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