레일 충돌댐퍼에 따른 열차 실내외소음 특성 분석

초록

Recently, railway noise has become a major issue. The rolling noise from rails and wheels due to the surface roughness plays an important role to the railway noise. In order to reduce the rolling noise, the previous study has developed the rail impact damper, which attenuates the vibrating energy of the rail track by using the principle of partial inelastic impacts. To analyze the interior noise characteristics of trains with rail impact dampers over the rail track, in this study, several testing impact dampers were mounted 150m long over the rail track line between the Wangil and Geomdanoryu station. The noise levels, frequency characteristics and sound quality index before and after the installation of rail impact dampers were measured and compared.