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

- 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-rotati ng 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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