Contribution of rolling noise and aerodynamic noise to the total noise generated from the lower part of shinkansen cars running at high-speed

Abstract

In order to reduce the noise emitted by Shinkansen trains, it is important to develop appropriate measures to abate noise generated by pantographs and noise generated from the lower part of cars. The noise generated from the lower part of cars consists mainly of aerodynamic noise and rolling noise. This paper first attempts to quantitatively estimate the contribution of rolling noise. Subsequently, the contribution of aerodynamic noise to the total noise generated from the lower part of cars is determined by means of a comparison of measured noise and analytically estimated rolling noise. For the Shinkansen train designed for high speed tests, it is concluded that, at the measuring point near the track, the aerodynamic noise could make a much greater contribution to the total noise generated from the lower part of cars than the rolling noise at high speeds.