Fixed Constraint (Rigid Domain)

The node adds a condition that makes the entire rigid domain fixed (fully constrained). The displacements and rotations are zero in all directions. There are no settings for this node. See Rigid Domain.


	The Fixed Constraint and Prescribed Displacement/Rotation subnodes cannot be combined for a Rigid Domain.

Reaction Force Settings

Select to compute the reaction force caused by the constraint. The default is to not compute the reaction force. When selected, the constraint is implemented as a weak constraint.

Select to use a unidirectional constraint for enforcing the prescribed motion. The default is that bidirectional constraints are used. For a fixed constraint, there is no effect of changing this setting.


	You can activate and deactivate the fixed constraint by assigning it to a constraint group. See Load Cases in the Structural Mechanics Modeling chapter. Note that constraint groups only can be used when the constraints are pointwise, but not for weak constraints. This means that if Evaluate reaction forces is selected, any constraint group settings are ignored.

Location in User Interface

Context Menus

Ribbon

Physics tab with node selected in the model tree:

When this node has been added once, it is no longer available for selection in the context menu or ribbon.