How to implement boundary condition in a cylindrical part

[jj89]

I have a cylinder and My problem is that I want to implement a boundary condition of free displazament along the edge, but radially lock the displazaments, and i only know how lock the displazament long x, y or z, but not radialy.

Thank you!!!

 

[Mustaine3]

Create a cylindrical coordinate system and refer to that when defining the boundary condition.

 

[jj89]

thank you for your reply Mustaine3, I tried to do that and the thing i'm not sure is the position of the edges Ur = U1? I mean the numerical and the normal names,

Thank you!!!

 

[corus]

When you apply the boundary condition you can tell by the direction of the arrows which way you've restrained it.