General Mechanical

General Mechanical

topology optimization problems

    • Lucka
      Subscriber

      Hi there,

      I am a mechanical engineering student. I have already completed the transient structural analysis of a reluctance electric rotor and now I need to optimize its topology but without touch the electromagnetic field optimization. I've added axcess material to the original geometry and i want to lightweight the rotor as much as possible so that i can reach the preset nominal rotational speed and avoid the material yield. That's the reason why I chosed Global Von Mises Stress for Definition of Response Constraint, but i can't obtain any results. I was hoping that the software would have limited the excess material leaving just tiny bridges to sustain the reluctance caves. Can you kindly help me?

      I attach some screenshots of what i've done

      Thanks

      Lucka


    • John Doyle
      Ansys Employee
      What happens if you try to minimize compliance as the objective and add a response constraint to minimize the mass and include the max stress limit as a supplemental response constraint? Also, try taking out the maximum amount of mass that you would allow to be removed and rerun the static stress analysis (as a test). nAlso, what is the max stress in the minimum material condition? Perhaps your stress limit needs to be adjusted.n
    • Lucka
      Subscriber
      Thank you for the answer. I did what you suggested and the software works but removes too little material. In the Topology Density solution i can check that it did just 5 iterations (meanwhile the maximum number of iterations in the Analysis Settings is 500). My stress limit should be ok beacause the rotor is structurally oversized (if i return to the static stress analysis after the topo optimization the Safety Factor is bigger then 15). If you need more informations, please don't hesitate to ask.n
Viewing 2 reply threads
  • You must be logged in to reply to this topic.