How to simulate a support with different stiffness.

- March 28, 2021 at 7:59 am
  
  user deleted
  Subscriber
  
  I have an electric motor and it shows various bearing vibrations on different foundations (in reality). The reason for such behaviour is the different stiffness of foundations. I want to figure out the stiffness values of these foundations by selecting different stiffness values in the mechanical.
  I perform modal analysis and set the fixed support on the bottom of the motor. Then I get the natural frequencies of the motor on the max rigid foundation.
- March 31, 2021 at 12:15 pm
  
  1shan
  Ansys Employee
  
  ,nHave you tried using an elastic support? RMB>Modal>elastic support (refer Elastic Support (ansys.com)). If you want to include tangential stiffness as well you can use a bonded contact with command snippets. Check this out https://mechanicsandmachines.com/?p=258.nnnRegards,nIshan. n/forum/discussion/3978/how-to-access-the-ansys-online-helpn
- April 5, 2021 at 3:59 am
  
  user deleted
  Subscriber
  
  Ishan, thank you. nI have used elastic support but it led to error too. n