Use ANSYS APDL To Export Stiffness Matrix

    • Vasily0616
      Hi Everyone I need to export a 96*96 stiffness matrix about a gearbox with screws from ANSYS workbench, but I met some problems.
      At first, I defined some Beam contact as screws and gave them two steps Load and Lock in Analysis Setting.
      And I set 16 Remote Points in the middle of the bearings And named them in Command. I need to export the stiffness matrix about these points.
      Then I added a command in Analysis Setting, but the model stopped from here and met some errors.

       *** ERROR ***       CP =  842.062 TIME= 11:13:07
       The analysis type must not be changed after the first load step. For a new analysis, enter the FINISH command now and
      reenter using the   /SOLUTION command.

      There is my APDL code.


      seopt,,1,2,1,resolve !CHANGES MADE HERE



      I don't know how to improve my code to export the stiffness matrix.
      Thanks a lot in advance!

    • Ashish Khemka
      Ansys Employee

      Please see if the following link helps:

      Export Stiffness Matrix from Ansys (

      Regards Ashish Khemka
    • Vasily0616

      That's very useful about exporting parts! Thank you.
      BTW, I have met some new problems with stiffness matrix again, you may check this post if you please, thank you in advance
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