Random torsional vibration in automobile transmissions

1. Introduction Transmissions which consist of many different and complicate components as clutches, gearboxes, transversal shafts, etc., are a very important part of automobiles. The torsional vibrations in transmissions affect directly their performances. Many researchers have studied the free and periodic torsional vibrations, the noise and the nonlinear in automobile transmissions 1, 2] etc., considering only the excitation of engine. But the random torsional vibrations excited by road pr…

Random torsional vibration in automobile transmissions

The action of a road profile to the torsional vibrations in automobile transmissions is studied. The model to calculate the random torsional vibrations in the transmissions is proposed and the values of the model parameters are determined by both computation and experiment. Furthermore, the dynamic characteristics and the responses of automobile transmissions to the random excitation of road profile are calculated. The results of road experiment demonstrate that the theoretic analyses and the calculation are correct, which imply that the low frequency torsional vibrations in automobile transmissions are caused by the random excitation of a road profile.