Hey folks, I just wonder how you guys think about this. Assume that there is a spring pendulum rotating at hinge (Free swing or forced swing). In this case, can I calculate force transmissibility (transmitted force amplitude to ground via spring devided by centrifugal force amplitude) ? or is it not logical because centrifugal force is not excitation force to the system ? The point is, if there is a rotation, spring would vibrate more than the case w/o rotation. So I want to quantify how much the rotation affect to the vibration. Does it make sense to you? Any kind of comment will be very appreciated. Thanks!