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Wave effects in a realistic tunnel induced by the passage of high-speed trains

机译：高速列车通过引起的真实隧道中的波浪效应

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摘要

As a high-speed train passes through a tunnel, aerodynamic pressure waves propagate backwards and forward in the tunnel, and they persist for a long time after the train is gone. Understanding the aerodynamic characteristics influenced by various factors on a tunnel is essential for ensuring the safety of tunnel structures. Field measurements were conducted in a 2812 m-long tunnel to systematically investigate the pressure characteristics during the passage of CRH2-150C and CRH380AL high-speed trains through the tunnel, both in single-train and intersecting cases. The results reveal that as the train speed increases, the location of the maximum peak-to-peak pressure variation shifts toward the tunnel entrance, mainly driven by the change in the negative pressure peak. The train length induces significant differences in peak pressures on the tunnel wall in the middle of the tunnel, and a long train brings more massive subsequent pressure waves than a short train in the post-train stage, but they decay faster. The intersection of two trains in the tunnel not only causes a significant change in the peak pressure and its location, but also has a significant effect on damage factor (the damage level on a structure subjected to a specific load) after train leaving the tunnel, with a 65.3% of this factor during trains operating in the tunnel.
机译：高速列车通过隧道时，空气动力压力波在隧道中前后传播，并且在列车驶离后它们会持续很长时间。了解隧道上各种因素影响的空气动力学特性对于确保隧道结构的安全至关重要。在2812 m长的隧道中进行了现场测量，以系统地研究CRH2-150C和CRH380AL高速列车通过隧道时的压力特性，无论是单列车还是相交情况。结果表明，随着列车速度的增加，最大峰峰值压力变化的位置移向隧道入口，这主要是由负压力峰的变化所驱动。列车长度在隧道中间的隧道壁上引起峰值压力的显着差异，并且在列车后阶段，长列车比短列车带来更大的后续压力波，但衰减更快。隧道中两列火车的交叉点不仅会导致峰值压力及其位置发生明显变化，而且还会对火车离开隧道后的破坏系数（承受特定载荷的结构的破坏程度）产生重大影响，在隧道中运行的火车中，这一因素占65.3％。

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  • 来源
    《Tunnelling and underground space technology》 |2019年第4期|224-235|共12页
  • 作者

    Liu Tanghong; Jiang Zhenhua; Chen Xiaodong; Zhang Jie; Liang Xifeng;

  • 作者单位

    Cent S Univ, Sch Traff & Transportat Engn, Minist Educ, Key Lab Traff Safety Track, Changsha 410075, Hunan, Peoples R China|Joint Int Res Lab Key Technol Rail Traff Safety, Changsha 410075, Hunan, Peoples R China|Natl & Local Joint Engn Res Ctr Safety Technol Ra, Changsha 410075, Hunan, Peoples R China|Chalmers Univ Technol, Dept Mech & Maritime Sci, S-41296 Gothenburg, Sweden;

    Cent S Univ, Sch Traff & Transportat Engn, Minist Educ, Key Lab Traff Safety Track, Changsha 410075, Hunan, Peoples R China|Joint Int Res Lab Key Technol Rail Traff Safety, Changsha 410075, Hunan, Peoples R China|Natl & Local Joint Engn Res Ctr Safety Technol Ra, Changsha 410075, Hunan, Peoples R China;

    Univ Manchester, Sch Mech Aerosp & Civil Engn, Manchester M13 9PL, Lancs, England;

    Chalmers Univ Technol, Dept Mech & Maritime Sci, S-41296 Gothenburg, Sweden;

    Cent S Univ, Sch Traff & Transportat Engn, Minist Educ, Key Lab Traff Safety Track, Changsha 410075, Hunan, Peoples R China|Joint Int Res Lab Key Technol Rail Traff Safety, Changsha 410075, Hunan, Peoples R China|Natl & Local Joint Engn Res Ctr Safety Technol Ra, Changsha 410075, Hunan, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    High-speed railway tunnel; Field measurement; Wave effect; Post-train stage; Damage factor;

    机译：高速铁路隧道;现场测量;波效应;列车后阶段;损伤系数;

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