Apply the Constraints

We will now apply the surface constraints to the symmetry planes and a nodal constraint to the bottom of the vessel.

1. Click  View Navigate Orientation Front View.
2. With  the  Selection Shape Point or Rectangle and  Selection Select Surfaces commands active, click and drag to draw a rectangle enclosing the top edge of the model, as shown below.

   

3. Click Setup Constraints General Constraint.
   • Click the Z Symmetry button.
   • Click OK.
4. Draw a selection rectangle enclosing the right edge of the model, as shown below.

   

5. Click Setup Constraints General Constraint.
   • Click the X Symmetry button.
   • Click OK.
6. Click the Home icon that appears above the ViewCube when the cursor is in that area. An isometric view of the model is displayed.
7. Select  View Navigate Zoom Window. Draw a box around the bottom corner of the pressure vessel to zoom into this corner, as shown in the following image.
   
   • Press Esc to exit the zoom area command.
8. With the  Selection Select Vertices command active, click the node at the bottom corner of the model, as shown highlighted below.

   

9. Click Setup Constraints General Constraint.
   • Click the Fixed button.
   • Click OK.  

Next

Parent topic: Bolted Flange Static Stress Analysis