The symmetry condition is equivalent to imposing zero values for the normal displacement and tangential force components, respectively. For axisymmetric models, Ansys Polydata identifies the axis of symmetry (r=0) automatically and imposes the symmetry condition on that section.

To define symmetry condition, you will need to select Plane of symmetry (fs=0, dn=0) from the list of boundary conditions.

  Plane of symmetry (fs=0, dn=0)