다양한 형상의 터널 출구로부터 방출되는 미기압파 측정

초록

When a high-speed train enters a tunnel, a compression wave similar to a nose shape of the train is generated in the tunnel entrance and propagates in the tunnel at a sonic speed. When it reaches the tunnel exit, an impulse wave is emitted from the exit to the outside. The impulse wave emitted from the tunnel exit generates impact noise and low frequency vibration, and causes serious environmental problems such as affecting private houses and building around the tunnel. In order to solve these engineering problems, it is important to develop the methods to predict the emission pattern of impulse wave emitted from the tunnel exit and to reduce the impulse wave. In this study, a test bed for a high-speed train-tunnel system is constructed, and the characteristics of the impulse wave emitted from tunnel exit portals with various configurations are investigated."