Apply the Constraints

1. In the tree view, right-click on Constraints under Subcase 1 and choose New.
2. Rename the constraint to Shaft Hole Fixed.
3. Orient the model inside Autodesk Nastran In-CAD so that you can clearly view and pick the lower center hole surface.

   

4. Be sure that Subcase 1 is selected in the Subcases list.
5. Accept the default settings and click OK to define the constraint.

   By default the constraint is set to Fixed condition (all 6 degrees of freedom of the nodes on the selected surface are constrained).

6. If you zoom in on the shaft hole in the model window, you can now see the symbols of the fixed constraint.