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Experimental Study on the Vibration Control Effect of Long Elastic Sleeper Track in Subways

机译：地铁长弹性轨枕振动控制效果的实验研究

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摘要

The vibration effect of urban rail transit has gained attention from both academia and the industry sector. Long Elastic Sleeper Track (LEST) is a new structure for vibration reduction which has recently been designed and applied to Chinese subways. However, little research has been devoted to its vibration reduction effect. In this study, field tests were conducted during peak transit hours on Beijing Subway Line 15 to examine the vibration reduction effects of the common ballastless track and LEST on both straight and curved sections. The results demonstrate that although LEST increases the wheel-rail vertical forces, rail vertical displacements, and rail accelerations to some extent, these effects do not threaten subway operational safety, and vibrations of track bed and tunnel wall are positively mitigated. LEST has an obvious vibration reduction effect at frequencies above 40 Hz. In straight track, the vibration of bottom of the tunnel wall measured in one-third octave bands is reduced by 10.52 dB, while the vibration at point on the tunnel wall at 1.5 m height is reduced by 9.60 dB. For the curved track, the vibrations at those two points are reduced by 9.35 dB and 8.44 dB, respectively. This indicates that LEST reduces vibrations slightly more for the straight track than for the curved track.
机译：城市轨道交通的振动效应已引起学术界和工业界的关注。长弹性轨枕轨道（LEST）是一种新的减振结构，最近被设计并应用于中国地铁。但是，对其减振效果的研究很少。在这项研究中，在北京地铁15号线的高峰运输时间进行了现场测试，以检验普通无ball轨道和LEST在直线段和曲线段上的减振效果。结果表明，尽管LEST在一定程度上增加了轮轨垂直力，轨道垂直位移和轨道加速度，但这些影响并没有威胁到地铁的运行安全，并且可以很好地缓解轨道床和隧道壁的振动。 LEST在40 Hz以上的频率下具有明显的减振效果。在直线轨道中，以三分之一倍频程测量的隧道壁底部的振动减少了10.52 dB，而1.5 m高的隧道壁上点的振动减少了9.60 dB。对于弯曲的轨道，这两个点的振动分别减小了9.35 dB和8.44 dB。这表明，对于弯曲的轨道，直轨的LEST减少的振动要稍微多一些。

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  • 来源
    《Shock and vibration》 |2018年第5期|6209518.1-6209518.13|共13页
  • 作者

    Cai Xiaopei; Cui Rixin; Li Dacheng; Miao Qian; Zhang Yanrong;

  • 作者单位

    Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China;

    Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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