高速列車によって発生するトンネル入口波の数値解析 : 第3報,等断面積多孔壁フードの影響

概要

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In this study, compression waves produced by high-speed trains which enter a tunnel with the perforated hood of which the cross-sectional area equals the tunnel were numerically investigated. The equations of the one-dimensional, unsteady and compressible flow with the mass removal in which the area of a tube is dependent on the time and the distance were numerically solved by the method of characteristics. The calculations were performed for tunnels with various hoods of which porosities are different in the cases in which the speeds of the train are 200km/h and 300km/h, and the effects of the porosity of the hood for the shape and the pressure gradient of compression waves were quantitatively clarified. The results show that the pressure gradient with time of compression waves is affected largely by the porosity of the hood.
一般社団法人日本機械学会の論文
1993-04-25