A study on vibration and noise of differential by using comsol multiphysics simulation

Abstract

In recent decades, the economy is strongly developed, the demand for freight and travel is increasing. The transportation network is developing rapidly, the means of travel by car is increasingly occupying an important and indispensable position for the society. At the same time, the surrounding noise started to cause more and more serious effects on human life. Especially, when driving makes annoying noise to the driver. The differential is the last unit to receive torque from the engine through the transmission to the gearbox. The differential is usually installed together with the final transmission, also known as the bridge. Differentials can be found in all modern cars and trucks, and especially in fully active four-wheelers. The differential is also the source of the noise in the vehicle, through Comsol Multiphysics software we can simulate the vibration and noise generated in the differential. In this paper, the differential is simulated with many different working speed ranges for comparison of noise and vibration. The results show that the larger the rotation speed, the greater the amplitude of the acceleration  and vice versa.