The FM measure returns the magnitude of the net translational force acting on marker i. All force and constraint elements acting between markers i and j are included in the calculation of the force. If j is not specified, FM measures the sum of all force and constraint elements acting on marker i.
Format
FM(i[,j])
Arguments
i | An integer that specifies the identifier of the marker at which the magnitude of the net force is to be calculated. |
j | A second integer that specifies a marker identifier. All forces acting between the [i,j] pair are to be included in the calculation. Set j = 0 or do not specify if you are interested in all forces acting on marker i. |
Examples
VARIABLE/1, FUNCTION=FM(23)
A user-defined state variable is specified by this VARIABLE statement. Its value is the magnitude of the sum of all action-only forces acting at Marker 23.
VARIABLE/1, FUNCTION=FM(23,11)
A user-defined state variable is specified by this VARIABLE statement. Its value is the magnitude of the sum of all the applied and constraint forces at Marker 23 and acting between Markers 23 and 11.