General Mechanical

General Mechanical

Exporting Participation Factors using APDL commands (Modal Analysis)

    • SofiK


      I'm trying to extract the participation factors of a structure as part of a modal analysis.

      In the commands code, I create an array called "PF" of size [NumberOfModes x 7], which is used to store the frequency values and 6 participation factors (in each direction x,y,z,rotx,...) for all the modes that are needed.

      When I open the results file I see that for all the modes, all the participation factors are stored only for the ROTZ direction regardless of the desired direction (x,y, etc...). The "PF" array contains [NumberOfModes x 1] frequencies, and [NumberOfModes x 6] which all contain the same Participation factors for ROTZ direction copied 6 times in a row.

      How can I fix the problem?

      If any additional information is needed please let me know.

      The code I've been using is attached here:














      /OUTPUT,'C:UsersSofiDesktopWorkAnsys checkLPlateModalOutSelectedModesParticipationFactor','txt',,



    • Erik Kostson
      Ansys Employee
      This will do what you need (change the C: drive to whatever location you need):

      (6(' ',F10.5))
    • SofiK
      I'm sorry but your proposed code gives exactly the same results. The results contain only the results for ROTZ direction.
      Any other methods to try?
    • Erik Kostson
      Ansys Employee

      So this code works - we have tried this and it works fine (used it for project work also and it works always) : see below.

    • SofiK
      Can you maybe send me the beginning of your code to understand if I need to change something in the settings prior to your suggested part of the code?
    • Erik Kostson
      Ansys Employee
      That is all the code that is inserted into a command object as shown:

    • SofiK
      It worked once I cleared the generated results and restarted the analysis. I guess the software could not overwrite the results for some reason.
      Thank you for your help!
    • Erik Kostson
      Ansys Employee
      Very good.
      Glad to be of help.

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