*AtPointJoint()

Creates an at-point joint.

Syntax

*AtPointJoint(joint_name, "joint_label", body_1, body_2, origin, Optional: ALLOW_COMPLIANCE)

Arguments

joint_name: The variable name of the at-point joint.; Data type: varname
joint_label: The descriptive label of the at-point joint.; Data type: label
body_1: The first body constrained by the at-point joint.; Data type: Body
body_2: The second body constrained by the at-point joint.; Data type: Body
origin: The location of the at-point joint for body_1.; Data type: Point
ALLOW_COMPLIANCE: An optional argument that indicates the joint can be made compliant.

Example

*Body(b_kn, "Knuckle", p_kn_cm)
*Body(b_lca, "LCA", p_lca_cm) 
*Point(p_lbj, "Lower ball joint")
*AtPointJoint(lbj, "Lower Ball", b_kn, b_lca,  p_lbj,  ALLOW_COMPLIANCE)

Context

*BeginMdl()

*DefineAnalysis()

*DefineSystem()

Properties

Property	Returns Data Type	Description
b1	Body	The first body constrained by the at-point joint.
b2	Body	The second body constrained by the at-point joint.
i	Marker	The marker on b1.
id	long integer	Solver identification number.
isbush	boolean	See Comments.
j	Marker	The marker on b2.
label	string	The descriptive label of the at-point joint.
state	boolean	Control state (TRUE or FALSE).
type	string	Unique joint type.
varname	string	The variable name of the at-point joint.

Comments

*AtPointJoint() is used to join two bodies at a specific point.

The ALLOW_COMPLIANCE argument is optional. When it is included, it indicates that the joint can be made compliant. In compliant mode, such a joint acts as a bushing.

The isbush property is valid only for joints that can be made compliant. When isbush is set to FALSE, the joint acts like a kinematic joint (in a noncompliant mode). When isbush is set to TRUE, the joint acts like a bushing (in a compliant mode).

When the compliant option in a system is switched to "non-compliant", all the joints in the system act as kinematic joints. However, when the system option is switched to "compliant", only the joints that are created with an ALLOW_COMPLIANCE flag act as bushings. The rest of the joints continue to behave as kinematic joints.