*FixedJointPair()

Creates a fixed joint pair.

Syntax

*FixedJointPair(joint_name,"joint_label",body_1, body_2, origin, [ALLOW_COMPLIANCE])

Arguments

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

Example

*PointPair(p_strut_tube_lwr, "Lower strut tube point")
*BodyPair(b_kn, "Knuckle", p_kn_cm)
*BodyPair(b_strut_tube, "Lower strut tube", , p_strut_tube_lwr)
*FixedJointPair(j_strut_tube_lwr, "Strut lwr joint", 
 b_strut_tube, 
 b_kn, 
 p_strut_tube_lwr, 
 ALLOW_COMPLIANCE)

Context

*BeginMdl()

*DefineAnalysis()

*DefineSystem()

Properties

Table 1.
Property	Returns Data Type	Description
b1	BodyPair	The first body pair constrained by the fixed joint pair.
b2	BodyPair	The second body pair constrained by the fixed joint pair.
i	MarkerPair	The marker pair on b1.
isbush	boolean	See ^Comments^.
j	MarkerPair	The marker pair on b2.
l	FixedJoint	The left fixed joint.
label	string	The descriptive label of the fixed joint pair.
r	FixedJoint	The right fixed joint.
state	boolean	Control state (TRUE or FALSE).
varname	string	The variable name of the fixed joint pair.

Comments

*FixedJointPair() is used to make a rigid connection between bodies or body pairs.The individual joints of a *FixedJointPair() can be referred to as joint_name.l (left fixed joint) and joint_name.r (right fixed joint).

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

The isbush property is valid only for joint pairs that can be made compliant. When isbush is set to FALSE, the joint pairs act like kinematic joints (in a noncompliant mode). When isbush is set to TRUE, the joint pair acts like a bushing pair (in a compliant mode).When the compliant option in a system is switched to "non-compliant", all the joint pairs in the system act as kinematic joints. However, when the system option is switched to "compliant", only the joint pairs that are created with an ALLOW_COMPLIANCE flag act as bushing pairs. The rest of the joint pairs continue to behave as kinematic joints.