アレイ装置を用いた現地試験における高速列車の台車部空力音特性

抄録

When a high speed train runs, one of the major aerodynamic noises is generated from bogies. Therefore, it is necessary to investigate the mechanism of aerodynamic bogie noise in detail. In this paper, in order to understand the aerodynamic bogie noise, a field test was carried out with a one-dimensional linear array, in which microphones were arranged in a line to the rail direction. As a result, it was found that the linear array can be appropriately measured the acoustic characteristics of the aerodynamic bogie noise.