Study on the Effect of Vibration Reduction Characteristics of Floors on the Inside Running Noise in Railway Vehicles

전동차 바닥구조의 진동절연특성이 실내소음에 미치는 영향

Structure-borne noise is known to dominate internal running noise levels in open field. In this paper vibration isolation characteristics of floors are investigated to see their effect on the internal running noise. By using the analysis and test results of test specimen of small size, internal running noise level of complete train is estimated. Analysis results show that soft rubber as a vibration isolator has the most favorable effect on the inside running noise.