Bodies with Rotational Velocity Shrink as they Rotate

- December 16, 2019 at 4:00 pm
  
  MattGraham21
  Subscriber
  
  Hi,
  
  As part of my Final Year Project at the University of Sheffield, I have made a model of a train wheel set and some rails. The overall aim is the vary the suspension stiffness and investigate the reaction forces at the rail-wheel contact. I have added a rotational velocity to each axle, but the solution will not converge because the axles 'become highly distorted'. When visualising the partial solution, both axles shrink as they rotate. I have tried to do it so that the axles are set as rigid bodies but the solution was extremely slow and the 'overall progress' bar wouldn't get past about 5% complete. Any help or advice would be greatly appreciated.
  
  My .wpjz file is attached.
- December 17, 2019 at 12:40 pm
  
  peteroznewman
  Subscriber
  
  I recommend you use a Static Structural model to study the reaction forces at the rail-wheel contact point. Then there will be no rotational velocity, which is not necessary to understand the rolling wheel contact forces since the rotational velocity is too low to have any significant effect.

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