Define a surface-based coupling constraint.

This option is used to impose a kinematic or distributing coupling constraint between a reference node and a group of nodes located on a surface. It must be used in conjunction with the KINEMATIC or the DISTRIBUTING option.

Related Topics
In Other Guides
Coupling constraints
Element-based surface definition
Node-based surface definition


TypeModel data

LevelPartPart instanceAssembly

Abaqus/CAEInteraction module

Required parameters


Set this parameter equal to a label that will be used to refer to this constraint.


Set this parameter equal to either the node number of the reference node or the name of a node set containing the reference nodes.

When the reference node set contains multiple nodes, you should specify an influence radius to avoid overconstraint issues.


Set this parameter equal to the surface name on which the coupling nodes are located.

Optional parameters


Set this parameter equal to the radius of influence centered about the reference node. If this parameter is omitted, the entire surface is used to define the coupling constraint.


Set this parameter equal to the name given to the ORIENTATION definition (Orientations) that specifies the initial orientation of the local system in which the constrained degrees of freedom are defined.

There are no data lines associated with this option.