Attenuation and distortion of a compression wave propagating in a high-speed railway tunnel
Attenuation and distortion of a compression wave propagating in a high-speed railway tunnel
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高速铁路隧道中压缩波传播的衰减与畸变
DOI：
10.1299/kikaib.62.1847
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
K. Matsuo
中科院分区：
文献类型：
--
作者：
Shinya Mashimo;Eiji Nakatsu;T. Aoki;K. Matsuo
在3条新干线隧道中测量了高速列车进入隧道时产生的压缩波，并将测量结果与采用TVD格式计算的数值结果进行了比较。在板式轨道和有碴轨道隧道中，当压缩波沿隧道沿着传播时，其强度随距离呈指数衰减，且有碴轨道隧道中的衰减明显大于板式轨道隧道中的衰减。在板式轨道隧道中，压缩波传播时变陡，而在有碴轨道隧道中则传播。判断压缩波是陡化还是扩展的判据用声雷诺数约为10 ~ 15来表示。
Compression waves generated by a high-speed train entering a tunnel were measured in three Shinkansen tunnels and the results were compared with the numerical values calculated using the TVD scheme. The strength of a compression wave is exponentially attenuated with distance as it propagates along the tunnel in both slab and ballast track tunnels, and the attenuation in the ballast track tunnel is considerably larger than that in the slab track tunnel. In the slab track tunnel, the compression wave is steepened as it propagates, while it spreads in the ballast track tunnel. The criterion for judgment whether the compression wave is steepened or spreads is expressed by the value of acoustic Reynolds number of about l0∼15.