Research on the Control of Wheel-rail Noise by Wheel Sound-proof Skirt for High-speed Train

摘要

Shielding noise source is an effective way to reduce wheel-rail noise of high-speed railway. Wheel, as an important noise source, occupies a large proportion of wheel-rail noise. Therefore, shielding the wheel noise to reduce the radiated noise by installing sound-proof skirt is feasible. This paper takes transmission loss as the evaluation index, calculates and analyses the influence of different shapes and material parameters on the noise reduction effect of skirt basing on acoustic theory and statistical energy method. In order to provide a theoretical reference for reducing the noise radiation of high-speed train wheels and the choice of sound-proof skirts. The research results show that the structure and material parameters of the skirt will obviously affect the transmission loss in the whole frequency band. Under the same conditions, increasing the thickness of the skirt end face is beneficial to effectively isolate the noise; the Y-type skirt has stronger noise reduction performance than the T-type skirt; laying a higher unit mass of sound absorbing material can enhance the noise reduction effect of the skirt.