Antisymmetry about a plane with Y = constant (U1 = U3 = UR2 = 0;Abaqus/Standard only). ZASYMM: Antisymmetry about a plane with Z = constant (U1 = U2 = UR3 = 0;Abaqus/Standard only). PINNED: Pinned (U1 = U2 = U3 = 0). ENCASTRE: Fully built-in (U1 = U2 = U3 = UR1 = UR2 = UR3 = 0).
Toggle on the buttons labeled U1, U2, and U3 to constrain the end of the hinge in the 1-, 2-, and 3-directions. You do not need to constrain the rotational degrees of freedom of the hinge because solid elements (which have only translational degrees of freedom) will be used to mesh the hinge.
A list of the boundary conditions used in ABAQUS. U1, U2 and U3 specify movements along Table 1. UR2 and UR3 specify rotation about the x, y and z axes, respectively.
Abaqus ignores them. If your model is anything similar to figure 3.10 (your attachments), then the boundary conditions at the bottom edge are U1=0, U2=0 and U3=0 ( your Y axis is vertical). All
.
abaqus u1 u2 u3 meaning