EqualDOF

EqualDOF(master_node: int, slave_nodes: List[int], dofs: List[int])

Bases: MPConstraint

Multi-point equal degree of freedom constraint.

EqualDOF constrains specified degrees of freedom (DOFs) of multiple slave nodes to be identical to the corresponding DOFs of a master node. It is commonly used to model rigid connections, symmetry boundaries, or sliding joints.

Tcl form

equalDOF <masterNode> <slaveNode> <dof1> <dof2> ...

Note

The DOFs list contains 1-indexed integers representing the active degrees of freedom to constrain.
A single EqualDOF object can define equal kinematic conditions between a single master node and multiple slave nodes.

Example

from femora.core.model import Model

model = Model()
# Constrain DOF 1 (horizontal displacement) of node 2 to node 1
constraint = model.constraint.mp.equal_dof(
    master_node=1,
    slave_nodes=[2],
    dofs=[1],
)

Create an equal DOF constraint.

Parameters:

Name	Type	Description	Default
`master_node`	`int`	Tag of the retained (master) node.	required
`slave_nodes`	`List[int]`	List of constrained (slave) node tags.	required
`dofs`	`List[int]`	List of 1-indexed degrees of freedom to constrain.	required