Creo Topology Optimization > Model Setup > Constraints > To Define Ball Constraints—Topology Optimization
  
To Define Ball Constraints—Topology Optimization
1. Click Home > Constraints > Ball. The Ball Constraint dialog box opens.
2. Specify a name for the constraint or accept the default. Click the color swatch next to Name if you want to change the color of the constraint icon.
3. To create a new constraint set, select a constraint set from the Member of Set list, or click New and use the Constraint Sets dialog box.
4. Select the spherical surface or surfaces to constrain. The References collector shows the selected surfaces.
5. Click OK.
For details about constraints, see the Creo Simulate help.