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Harmonic Analaysis with rotor and non-rotating structures (example: washing m.)

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    • February 15, 2024 at 8:47 am
      Andreas Staub
      Subscriber

      In the ANSYS Innovation Courses, under Mechanics/Forced Frequency, there are examples of rotor dynamics with non-rotating structures (SE04 washing machine frame analysis). Is it permissible to introduce a rotating force to all parts (including non-rotating ones)? Shouldn't an APDL snippet with SYNCHRO command be applied in this case?

    • February 20, 2024 at 3:30 pm
      dlooman
      Ansys Employee

      Yes, that appears to be the only way.  After specifying a rotating force on "All Bodies", the ds.dat has the commands below.  Your commands will need to overwrite those commands, perhaps by redefining the commponent, cm_synchroComponent.  Not sure if it it's necessary then to reissue the synchro command, but it wouldn't hurt.  Do a small test to be sure it's working.

      /com,*********** Component For Rotating Forces ***********
      /com, Component For : All Bodies
      esel,all
      cm,cm_SynchroComponent,elem
      /com,*********** SYNCHRO & CMOMEGA For Rotating Forces ***********
      synchro,,cm_SynchroComponent

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