A numerical model for calculating vibration from a railway tunnel embedded in a full-space
A numerical model for calculating vibration from a railway tunnel embedded in a full-space
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DOI：
10.1016/j.jsv.2007.03.068
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发表时间：
2007-08
影响因子：
4.7
通讯作者：
M. Hussein;H. Hunt
中科院分区：
文献类型：
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作者：
M. Hussein;H. Hunt
地下铁路产生的振动会传到附近的建筑物，对居民造成滋扰，并使敏感设备失灵。振动可以通过降低钢轨垫的刚度、使用浮板轨道和/或在弹簧上支撑建筑物来隔离。由于需要在实施振动对策之前准确地评估其性能，地下铁路振动建模近来变得更加重要。本文开发了Forrest和Hunt报告的现有模型，用于计算地下铁路的振动。该模型，被称为管中管模型，已在本文中开发的反对称输入，因此在隧道壁的切向力模型。此外，三种不同的支持被认为是浮动板轨道，其中一个可以用来模拟直接固定板。本文还研究了轨道、隧道、周围土体以及耦合系统的导波解。结果表明，轨道的动力学有显着的影响，在波数-频率域的计算结果，因此，地下铁路的振动控制的重要作用。
Vibration generated by underground railways transmits to nearby buildings causing annoyance to inhabitants and malfunctioning to sensitive equipment. Vibration can be isolated through countermeasures by reducing the stiffness of railpads, using floating-slab tracks and/or supporting buildings on springs. Modelling of vibration from underground railways has recently gained more importance on account of the need to evaluate accurately the performance of vibration countermeasures before these are implemented. This paper develops an existing model, reported by Forrest and Hunt, for calculating vibration from underground railways. The model, known as the Pipe-in-Pipe model, has been developed in this paper to account for anti-symmetrical inputs and therefore to model tangential forces at the tunnel wall. Moreover, three different arrangements of supports are considered for floating-slab tracks, one which can be used to model directly-fixed slabs. The paper also investigates the wave-guided solution of the track, the tunnel, the surrounding soil and the coupled system. It is shown that the dynamics of the track have significant effect on the results calculated in the wavenumber–frequency domain and therefore an important role on controlling vibration from underground railways.