Adams Car Package > Shared Material > Appendix > Rotating Mass

Rotating Mass

A rotating mass applies a frequency-dependent force. This actuator represents the force due to a rotating mass located at a specified offset from an axis of rotation. The axis of rotation is defined by the input channel to which this vibrational actuator is applied.
where:
■ is the frequency
■is the unbalanced mass forcing function
■m is the unbalanced mass
■r is the radial distance of the unbalanced mass from the axis of rotation
Similarly, a rotating mass placed at a distance offset along the axis of rotation results in an unbalanced moment.
where:
■ is the moment due to unbalanced mass with offset
■d is the distance of the unbalanced mass perpendicular to the plane