Guidelines for Prescribed Displacement Constraints
In defining prescribed displacement constraints, be aware of the following:
• Do not set a prescribed displacement on a model that conflicts with another constraint in the same constraint set.
• If the Z axis of a reference cylindrical or spherical coordinate system touches an entity that you want to constrain, you may not be able to successfully specify a prescribed displacement value for one or more of the directional components. Creo Simulate may display a message informing you of the problem. For FEM mode, you will see the message at run time.
To work around this problem, you can change the coordinate system to a Cartesian coordinate system or re-orient the coordinate system so that the Z axis no longer touches the entity you want to constrain.
• Although you can specify prescribed displacements in contact analyses, you should take care not to place these on geometry that is part of the contact.