RigidLink

RigidLink(type_str: str, master_node: int, slave_nodes: List[int])

Bases: MPConstraint

Multi-point rigid link kinematic constraint.

RigidLink defines a kinematic constraint representing a rigid link between a master node and multiple slave nodes. It supports two kinematic behaviors: axial rigidity only ('bar') or axial and bending rigidity ('beam').

Tcl form

rigidLink <type> <masterNode> <slaveNode>

Note

The rigid link type must be either 'bar' or 'beam'.
Using the 'beam' link type requires that the participating master and slave nodes have rotational degrees of freedom.

Example

from femora.core.model import Model

model = Model()
# Constrain node 2 to master node 1 with a rigid beam link
constraint = model.constraint.mp.rigid_link(
    type_str="beam",
    master_node=1,
    slave_nodes=[2],
)

Create a rigid link kinematic constraint.

Parameters:

Name	Type	Description	Default
`type_str`	`str`	Kinematic link type. Must be either `'bar'` or `'beam'`.	required
`master_node`	`int`	Tag of the retained (master) node.	required
`slave_nodes`	`List[int]`	List of constrained (slave) node tags.	required

Raises:

Type	Description
`ValueError`	If `type_str` is not `'bar'` or `'beam'`.