新干线车辆高速运行时滚动噪声和空气动力噪声对车辆下部总噪声的贡献

Contribution of Rolling Noise and Aerodynamic Noise to the Total Noise Generated from the Lower Part of Shinkansen Cars Running at High-speed

为降低新干线列车发出的噪声,首先试图定量估算滚动噪声的贡献。随后,通过比较测量的噪声与分析估算的滚动噪声,确定空气动力噪声对车辆下部总噪声的贡献。研究结果显示,当车辆高速运行时,轨道附近测点处空气动力噪声对车辆下部总噪声的贡献比滚动噪声大。

In order to reduce the noise emitted by Shinkansen trains, the contribution of rolling noise shall first be tried to be estimated quantitatively. Then, through a comparison of the measured noise and the analytically estimated rolling noise, the contribution of aerodynamic noise to the total noise generated from the lower part of vehicles is determined. It can be obtained that the contribution of aerodynamic noise at the measurement points near the track could make greater contribution to the total noise generated from the lower part of vehicle than the rolling noise at high speeds.