Apply the Constraints

Now we will apply the fixed boundary conditions to the static combs and the end of the moving comb.

1. Click  View Navigate Orientation Top View.
2. With the  Selection Shape Point or Rectangle and  Selection Select Vertices commands active, click the node at the top of the vertical beam element (+Y end) as currently viewed (see image below).

   

3. Click Setup Constraints General Constraint.
   • Click the No Translation button.
   • Click OK.
4. With this node still selected, click Setup Constraints 1D Spring Support.
   • Activate the Rotation option under Type.
   • Click the Y Direction option.
   • Type 0.35 in the Stiffness field.
   • Click OK.
5. Click the node at the bottom of the vertical beam element (-Y end) as currently viewed (see image below).

   

6. Click Setup Constraints General Constraint.
   • Activate the Tx and Tz options under Constrained DOFs.
   • Click OK.
7. Click  View Navigate Orientation Back View.
8. With the  Selection Select Surfaces command active, select the face of the ring at the outside diameter of the motor, as shown highlighted below (yellow on green).  
   
9. Click Setup Constraints General Constraint.
   • Click the Fixed button.
   • Click OK.

Next

Parent topic: Radial Comb Motor Static Stress Analysis