철도 차량-터널의 압력파와 기밀에 관한 연구

초록

When the pressure waves are generated when the vehicle passes through a tunnel, the pressure wave affects the passenger's ear discomfort and tightness. These pressure waves are alternately propagated and reflected at the exit and entrance of tunnel. Severe pressure transients cause the repeated fatigue load to car-body and tunnel wall, ear-discomfort to passengers, and micro pressure wave to the surroundings of tunnel exit. To clarify quantitative pressure change in tunnel is very important for the optimal design of carbody. In this study, we measured pressure change in tunnel and train. We have calculated pressure transients of train-tunnel interface by using experimental results that are obtained on Honam high speed line. The results show that airtight system of the vehicle have a significant impact on the passenger’s ear discomfort. If the flap opens, pressure changing rate in speed 200km/h is greater than the reference.