3.1.5.1. EqualDOF Constraints

This command is used to construct a multi-point constraint between nodes where the degrees-of-freedom at the constrained node move exactly the same as the degrees-of-freedom at the other node, the retained node.

equalDOF $rNodeTag $cNodeTag $dof1 $dof2 ..

Note

retained (primary) node

constrained (secondary) node

valid range of $dof is 1 through ndf of the constrained node

if no dofs are specified, all dofs of the constrained node are used

Example:

The following command will impose the displacenents at dof’s 1, 3, and 5 at node 2 to be the same as those of node **33*.

1. Tcl Code

equalDOF 2 33 1 3 5;

1. Python Code

equalDOF(2,33,1,3,5);

Reference:

Cook, R.D., Malkus, D.S., Plesha, M. E., and Witt, R. J., “Concepts and Applications of Finite Element Analysis,” 4th edition, John Wiley and Sons publishers, 2002.

Code developed by: fmk