新幹線の台車構成機器が台車部空力音に及ぼす影響

抄録

Aerodynamic bogie noise generated from Shinkansen train is main source above 300 km/h and its reduction is one of the important issues to conserve the environment along the railway lines. In order to reduce the bogie noise efficiently, it is essential to evaluate the contribution of the bogie components to the aerodynamic bogie noise. The purpose of this paper is to estimate their contributions at the measurement point close to the track. The wind tunnel test was carried out to measure the two dimensional sound pressure level distributions around the bogie using two dimensional microphone array. The noise contribution of each component was investigated by removing the component in the bogie model. Furthermore, two measures to reduce the aerodynamic noise, i.e., deflector and bogie under cover are examined.