General Mechanical

General Mechanical

Frequency Response Function (FRF) for rotation in ANSYS Workbench

    • azolo

      Hello everyone,

      For a point on my model I need the Frequency Response Function (FRF) of the Z-rotation after applied torque. In ANSYS Mechanical APDL there is the option but in ANSYS Workbench I don't find it. Is there a way to do it also in ANSYS Workbench?

      I hope someone can help me out.

    • azolo

      How can I get the rotational displacement in Z (rz) for a point in ANSYS Workbench?

    • peteroznewman

    • azolo

      I have now found a way but I don't know if there is a easier way.

      My steps to get the rotational FRF are:

      - Create a remote point on the point of the part where you need rotational displacement
      - Add the following APDL command to the remote point


      - Create an APDL command in the solution of the harmonic response (RS).

      (Since I need the frequency range from 0 to 4000 Hz and the solution itervalls are 1000 I do this through a script)

      *cfopen,'rot_z_FRF','txt'                 ! create a text file
      *do, i, 1, 1000                                ! the solutions intervalls from the analysis settings
      *vwrite, my_freq, my_rot_z

      How can I read the value of the solutions intervalls automaticly from the analysis settings?

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