Distortion of the Compression Wave Propagating Through a Very Long Tunnel with Slab Tracks
Distortion of the Compression Wave Propagating Through a Very Long Tunnel with Slab Tracks
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DOI：
10.1299/kikaib.71.2248
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
T. Fukuda;S. Ozawa;M. Iida;T. Takasaki;Y. Wakabayashi
中科院分区：
文献类型：
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作者：
T. Fukuda;S. Ozawa;M. Iida;T. Takasaki;Y. Wakabayashi
对目前世界上最长的山地隧道无板轨道新干线隧道列车进站时产生并传播的压缩波畸变进行了现场测量和数值模拟。在 12 个位置测量压缩波的压力。数值模拟中，通过考虑稳态和非稳态摩擦的一维可压缩流动分析，结合侧支效应的声学分析，计算压缩波形的畸变。数值模拟结果与现场测量结果吻合较好。此外，结果表明压缩波前在传播早期变陡，在传播后期变平滑。
Field measurement and numerical simulation were performed on the distortion of the compression wave generated by train entry and propagating through a slab track Shinkansen tunnel, which is the longest mountain tunnel in the world at present. The pressure of the compression wave measured at 12 locations. In the numerical simulation, the distortion of the compression waveform was calculated by one-dimensional compressible flow analysis which takes account of steady and unsteady friction combined with acoustic analysis on the effect of side branches. The results of numerical simulation agree well with those of the field measurement. Furthermore, the results show that the compression wavefront steepens in the early stage and smoothes down in the later stage of propagation.