Using Reference Geometry
You can use a selected reference geometry to apply restraints. The reference
can be a plane, axis, edge, or face. Using this option you can prescribe
restraints on vertices, edges, faces and beam joints.
In an assembly, you can use reference geometry
from the assembly or the components (parts and sub-assemblies) of the
assembly.
The number of degrees of freedom that can be restrained depends on the
mesh type and the selected reference.
Click any of the links below for more information: