콘크리트 궤도상 흡음판에 작용하는 도시철도 차량 하부 양력에 관한 연구

초록

To reduce noise at the urban rail transit, various noise reduction measures are being investigated and developed. As an effective alternative noise reduction system, the noise absorption blocks are installed upper side of the concrete track. Its absorbing mechanism has been reported to decreases the railway noise level originated by wheel-rail interaction. However the design parameter which should be considered for using noise absorption blocks, the pressure field formed around the moving train affects on the track and adds lift-up forces to the installed blocks. The lift-up forces cause the noise absorption blocks to break away from the top of track. That could make damage of the vehicle and track, or interference of train operation. In this study, the data of measuring pressure fluctuations occurred in a train at the passing and evaluating the lift-up force inflicted on the noise absorption blocks are expected to be used for designing noise absorption blocks.