Missing Constraints
Creo Simulate makes sure that there are constraints in your model. Note that a point-to-ground spring is a constraint.
You cannot define an analysis for a model with no constraints, unless you select one of the following:
• For a modal or prestress modal analysis select Unconstrained on the dialog boxes for modal analyses.
• For a dynamic time, dynamic frequency, or dynamic random analysis select Use modes from previous design study on the Previous Analysis tabs of the dialog boxes for dynamic analyses.