Antisymmetric
Anti-symmetric constraint means that the geometric shape, boundary conditions, and material properties of the analysis object are symmetric about a certain surface, and the load is antisymmetric about the surface, and the surface is called antisymmetric. The nodes on this surface satisfy zero normal rotation and zero tangential displacement (for example, if the normal direction of the anti-symmetric surface is the X axis, then: Uy=Uz=0, Rx=0).