A study on the noise reduction of rail systems

초록

In line with the national research project ？Development of Technology for Railway Noise and Vibration? noise reducing devices are being developed to enhance the track decay rate of track systems. The overall project is aimed at reducing noise radiation from rails. More and more slab tracks are being constructed in high speed lines and in metro railway lines, however there are also many railway lines with conventional ballasted tracks. For the optimization of conventional tracks and for effective planning of new railway tracks, a systematic study is required in order to achieve low-noise performance. According to the track type, the noise characteristics and the vibration characteristics are investigated by means of a noise prediction model that was developed by the Korea Railraod Research Institute and by means of field measurement results. A priliminary experimental study on vibration damping materials is introduced and discussed.