*ActionReactionForcePair()

Creates an action-reaction force pair.

Syntax

*ActionReactionForcePair (force_name, "force_label", {TRANS ROT TRANS_ROT}, body_1, body_2, point, Optional: ref_marker)

Arguments

force_name: The variable name of the action-reaction force pair.; Data type: varname
force_label: The descriptive label of the action-reaction force pair.; Data type: label
TRANS | ROT | TRANS_ROT: This argument indicates whether the action-reaction force pair has translational, rotational, or both translation and rotational components.
body_1: The body or body pair to which the active force pair is applied.; Data type: Body or BodyPair
body_2: The body or body pair to which the reactive force pair is applied.; Data type: Body or BodyPair
point: The point or point pair at which the force pair is applied.; Data type: Point or PointPair
ref_marker: An optional argument for the reference marker or reference marker pair in which the components of the force are specified.; Data type: Marker or MarkerPair

Example

*PointPair(p_jnc_bmp, "Jounce bumper pt")
*Body(b_axle, "Axle", p_axle_cg)
*Body(b_frame, "Frame", p_frame_cg)
*MarkerPair(mrk_ref, "Force reference", b_axle, p_wc)
 
*ActionReactionForcePair(frc_bmp, "Jounce bumper force", TRANS, b_axle, b_frame, p_jnc_bmp, mrk_ref)

Context

*BeginMdl

*DefineAnalysis

*DefineSystem

Properties

Property	Returns Data Type	Description
b1	BodyPair	Body pair to which the force pair is applied.
b2	BodyPair	Body pair to which the reactive force pair is applied.
b3	BodyPair	Body pair to which the reference marker is attached.
i	MarkerPair	The marker pair attached to b1.
j	MarkerPair	The marker pair attached to b2.
jfloat	MarkerPair	The floating marker pair attached to b2.
l	ActionOnlyForce	Left force.
label	string	The descriptive label of the action-reaction force pair.
r	ActionOnlyForce	Right force.
rm	MarkerPair	The reference marker pair in which the components of the force pair are specified.
state	boolean	Control state (TRUE or FALSE).
varname	string	The variable name of the action-reaction force pair.

Comments

*ActionReactionForcePair() is used to apply action-reaction force pairs to points or point pairs on bodies or body pairs.

If the optional argument for ref_marker is not specified, a global inertial frame is used as the reference marker for specifying force components.

The individual forces of an *ActionReactionForcePair() can be referred to as force_name.l (left force) and force_name.r (right force).