This article needs additional citations for verification. Please help improve this article by adding citations mechanical vibrations den hartog pdf download reliable sources. Unsourced material may be challenged and removed. Torsional vibration is angular vibration of an object—commonly a shaft along its axis of rotation.
Torsional vibration is often a concern in power transmission systems using rotating shafts or couplings where it can cause failures if not controlled. A second effect of torsional vibrations applies to passenger cars.
Torsional vibrations can lead to seat vibrations or noise at certain speeds. In reality this is not the case.