The assign displacement at points condition allows you to impose the displacement component at certain points within the computational domain. This condition is used to avoid rigid motion of a solid.
You will need to specify the coordinates of the points where the displacement is imposed, which component is involved, and the value of the displacement. Note, that the displacement will be imposed at the closest node. To specify this condition, do the following:
Click Assign displacement at points in the displacement boundary conditions panel.
Assign displacement at points
This will open the Assign displacement at points panel.
In the Assign displacement at points panel, select Creation of a new constraint menu item to create a new constraint.
Creation of a new constraint
A constraint with a default name Constraint #I will be created, where
Iis the default integer index (for example, 1, 2, 3,...). Note that you can change the name of the constraint, if you choose. By default, no constraint is applied.Select the newly-created constraint by selecting Constraint #I (or the label you have chosen, for example, myconstraint) from the list of constraints to change the default or the current constraint.
Constraint #I
Select Modify coordinates of point to change the location of the constraint.
Modify coordinates of point
Specify the value of X and Y (or X, Y, and Z in 3D).
Select Impose displacement-X (-Y or -Z as appropriate) to impose the displacement of a component.
Impose displacement-X
Note that this option changes and becomes Do not impose displacement-X (-Y or -Z) if Modify displacement-X (-Y or -Z) has been enabled.
Click Do not impose displacement-X (-Y or -Z) to remove the constraint on the X (Y or Z) component.
Click Modify displacement-X (-Y or -Z) to specify the value of the displacement component.
Modify displacement-X
Select the Deletion of a constraint option to delete the unwanted constraints.
Deletion of a constraint
Specify the constraint to be deleted.
Click the button on the displacement boundary conditions panel to see the constraints again.
After creating constraints for displacement, when you return to the displacement boundary condition panel, it will not be possible to verify constraints for displacement previously defined. To review the constraints, you will need to select assign displacement at points.
Assign displacement at points