This function
allows the user to create and/or modify the constraint options. The
CONTSTRAINTS dialog window appears as in Figure
Figure
SHOW CONSTRAINT
Toggle SHOW CONSTRAINT to show the current Constraint set.
SHOW FORCE
Toggle defined force ON/OFF to show the current load force.
ADVANCED OPTIONS
Toggle access to the advanced options for constraint definition.
1. CREATE CONSTRAINT SET
l Select a constraint type. There are six degree of freedom in LS-DYNA:
1. X-Translation
2. Y-Translation
3. Z-Translation
4. X-Rotation
5. Y-Rotation
6. Z-Rotation
The following menu (Figure
a) Basic b) Advanced
Figure
l Select CREATE.
l Enter the Constraint Set ID Number in the next window.
l Select nodes to constrain.
2. DELETE CONSTRAINT SET
l Select a constraint set from the list.
l Select DELETE.
l
Confirm the deletion in the
DYNAFORM QUESTION window (Figure
Figure
3. DEFINE CONSTRAINT
l Select a set from the list.
l Select a type.
l Select DEFINE.
l Select nodes. More nodes with the selected degree of freedom will be added to
the highlighted constraint set.
4. RELEASE CONSTRAINT
Remove some nodes from the selected constraint set.
1. CLEAR CONSTRAINT
Remove all nodes from a selected constraint
set. A DYNAFORM QUESTION window is displayed as in Figure
Figure
Select YES to delete all constraints.
Select NO to reject the choice.