In an axially symmetric problem, the only possible symmetry plane is has the Z-axis as normal. Use the Symmetry Plane node to impose such a symmetry condition.

From the drop-down list, select No displacement, Free Displacement, Prescribed force, or Prescribed displacement.

The value No displacement gives a standard symmetry condition.

Select Free Displacement to allow the symmetry plane to translate in the normal direction. The displacement is determined by the criterion that there is no resulting reaction force in the normal direction.

Select Prescribed force to prescribe the total reaction force acting on the direction normal to the symmetry plane. Enter the Normal force Fn. The force is defined as positive when acting along the outward normal of the symmetry plane. Setting the prescribed force to zero gives the same effect as using Free Displacement.

Select Prescribed displacement to prescribe the displacement in the direction normal to the symmetry plane. Enter the Normal displacement un0. Setting the prescribed displacement to zero gives the same effect as using No displacement.

To display this section, click the Show button () and select Advanced Physics Options.

Physics tab with Shell selected:
Points>More Constraints>Symmetry Plane