Materials

Materials

Use ANSYS APDL To Export Stiffness Matrix

    • Vasily0616
      Subscriber
      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.

      antype,substr

      seopt,,1,2,1,resolve !CHANGES MADE HERE
      *DIM,node_pos,array,arg1,4
      *DIM,dof_text_col,CHAR,1,arg1*6
      *GET,unitsys,ACTIVE,0,UNITS

      *DO,i,1,arg1
       M,M%i%,ALL
       node_pos(i,1)=i
       node_pos(i,2)=NX(M%i%)
       node_pos(i,3)=NY(M%i%)
       node_pos(i,4)=NZ(M%i%)
       dof_text_col(1,6*(i-1)+1)='N%i%_DX'
       dof_text_col(1,6*(i-1)+2)='N%i%_DY'
       dof_text_col(1,6*(i-1)+3)='N%i%_DZ'
       dof_text_col(1,6*(i-1)+4)='N%i%_RX'
       dof_text_col(1,6*(i-1)+5)='N%i%_RY'
       dof_text_col(1,6*(i-1)+6)='N%i%_RZ'
      *ENDDO

      allsel,all

      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 (ansystips.com)

      Regards Ashish Khemka
    • Vasily0616
      Subscriber

      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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