Example: Subtract ball CG Z-displacement from overall ball nodal displacements to obtain relative displacements.
At time = 0.0003 sec, ball CG, Node 21, has displaced 0.487 inches. Subtract this displacement from all nodal displacements, then create a fringe plot of ball displacement relative to the CG node.
> PCL Function
Figure 17, Select Result case > Time=0.0003
Enter New result name > Nodal Disp
Select result -> Displacement
Define PCL expression, Figure 18:
$ZZ – 0.487
Once the new results case is generated, plot the relative displacement fringe, Figure 19:
Make sure the Results Case Button is toggled OFF
Select the newly created results case