高速列車によって発生するトンネル入口波の数値解析 : 列車鼻部形状の影響

抄録

In this study, entry waves produced by high-speed trains which enter a tunnel were numerically investigated. The equations of the one-dimensional, unsteady and compressible flow with mass removal in which the area of a tunnel is dependent on the time and distance were numerically solved by the method of characteristics. The calculations were performed for trains with various nose shapes in the case in which the speed of the train was 300km/h, and the effects of the nose shape of the train on the entry waves were quantitatively clarified. As a result, the optimum condition of the nose shape which forms the entry wave with minimum pressure gradient was shown.