About constraints in Ansys Strutural !

- November 9, 2020 at 8:23 am
  
  Nguyen Van Toan
  Subscriber
  
  Hi everyone!
  I'm simulating thermal deformation by using Ansys Workbench (Structural module). There is a cylinder pipe as shown in Figure. The pipe can rotate around z-axis and the thermal deformation in radial direction only (That means the axis of the pipe is fixed and others are free. How can I apply these constraints?
  Thank you so much.
- November 9, 2020 at 3:19 pm
  
  Dragana Jandric
  Ansys Employee
  
  You can use remote displacement with the options to fix/free all translations and rotations. n
- November 10, 2020 at 1:54 am
  
  Nguyen Van Toan
  Subscriber
  
  Thank you for your reply. I tried that but I didn't obtain the results.n
- November 10, 2020 at 3:28 am
  
  BenjaminStarling
  Subscriber
  
  if this is a structural analysis, or coupled thermal-structural, there is no way to apply this boundary condition. If rotations in Z are free-free, you will have solver pivot errors. You can possibly simplify your analysis into an axisymmetric analysis, dependant on your load also being axisymmetric. The other option is to utilise a free-fixed constraint in Z rotation. I would do this with a remote point, and on one end of the pipe, fix rotations in Z.n

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