This information is part of the Modelica Standard Library maintained by the Modelica Association.

The 3 signals of the force connector and the 3 signals of the torque connector are interpreted as the x-, y- and z-coordinates of a force and of a torque acting at the frame connector to which frame_b of this component is attached. Via parameter resolveInFrame it is defined, in which frame these coordinates shall be resolved:

Types.ResolveInFrameAB.	Meaning
world	Resolve input force/torque in world frame
frame_a	Resolve input force/torque in frame_a
frame_b	Resolve input force/torque in frame_b (= default)
frame_resolve	Resolve input force/torque in frame_resolve (frame_resolve must be connected)

If resolveInFrame = ResolveInFrameAB.frame_resolve, the force and torque coordinates are with respect to the frame, that is connected to frame_resolve.

If force={100,0,0}, and for all parameters the default setting is used, then the interpretation is that a force of 100 N is acting along the positive x-axis of frame_b.

Note, a force and torque acts on frame_a in such a way that the force and torque balance between frame_a and frame_b is fulfilled.

An example how to use this model is given in the following figure:

This leads to the following animation (the yellow cylinder characterizes the line between frame_a and frame_b of the ForceAndTorque component, i.e., the force and torque acts with negative sign also on the opposite side of this cylinder, but for clarity this is not shown in the animation):

animation	Value: true Type: Boolean Description: = true, if animation shall be enabled
resolveInFrame	Value: Modelica.Mechanics.MultiBody.Types.ResolveInFrameAB.frame_b Type: ResolveInFrameAB Description: Frame in which input force and torque are resolved (1: world, 2: frame_a, 3: frame_b, 4: frame_resolve)

connectionLineDiameter	Default Value: world.defaultArrowDiameter Type: Diameter (m) Description: Diameter of line connecting frame_a and frame_b
forceColor	Default Value: Modelica.Mechanics.MultiBody.Types.Defaults.ForceColor Type: Color Description: Color of force arrow
torqueColor	Default Value: Modelica.Mechanics.MultiBody.Types.Defaults.TorqueColor Type: Color Description: Color of torque arrow
connectionLineColor	Default Value: Modelica.Mechanics.MultiBody.Types.Defaults.SensorColor Type: Color Description: Color of line connecting frame_a and frame_b
specularCoefficient	Default Value: world.defaultSpecularCoefficient Type: SpecularCoefficient Description: Reflection of ambient light (= 0: light is completely absorbed)