300KM/H급 고속철도의 터널 미기압파 저감을 위한 경사갱구의 실험적 연구

초록

The compression wave produced when a high-speed train enters a tunnel propagates along the tunnel ahead of the train. The micro pressure wave related to the compression wave is a special physics phenomena created by high-speed train-tunnel interfaces. On this work, the method for reducing the micro pressure wave is to delay the gradient of the compression wave by using aerodynamic structures. The objective of this paper is to determine the optimum angle of the slanted portal using the moving model rig. According to the results of the present study, the maximum value of micro pressure wave is reduced by 19.2% for the 45 slanted portal installed at the entrance of the tunnel and reduced by 1.9% for the 45 slanted portals at the entrance and exit of the tunnel. Also it is reduced by 34.6% for the 30 slanted portals installed at the entrance and exit of the tunnel.