Local Constraint Form

A Local Constraint causes all of its constrained joints to have the same displacements for each of the chosen degrees of freedom, taken in the separate joint local coordinate systems. The other degrees of freedom are unaffected. The Local Constraint differs from the rigid-body types of Constraints in that there is no coupling between the rotations and the translations. The Local Constraint is the same as the Equal Constraint if all constrained joints have the same local coordinate system.

This Constraint can be used to:

The constraint must apply to at least two joints to have any effect on the model. These joints may have any arbitrary location in space. The behavior of this constraint is dependent upon the choice of the local coordinate systems of the constrained joints.

Use the following areas on the Local Constraints form to make the appropriate entries:

If the Advanced > Define > Joint Constraints command was used to access the Local Constraints form, the defined constraint must be assigned to the joints.

 

See Also

Axisymmetry

Cyclic Symmetry

 

Access the Local Constraints form as follows:

 

Click the Advanced > Define > Joint Constraints command to display the Define Constraints form or select the joints to be constrained and click the Advanced > Assign > Joints > Constraints command to display the Define/Assign Constraints form. Then do one of the following:

    • Select "Local" from the Choose Constraint to Add drop-down list and click the Add New Constraint button.

    • Highlight a previously defined local constraint in the Constraints display list and click the Modify/Show Constraint button.