Vehicle dynamic interaction with railway track embankment
Vehicle dynamic interaction with railway track embankment
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DOI：
10.1680/tran.11.00024
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发表时间：
2014-02
期刊：
影响因子：
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通讯作者：
M. Esmaeili;J. Sadeghi;M. Fesharaki
中科院分区：
文献类型：
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作者：
M. Esmaeili;J. Sadeghi;M. Fesharaki
研究了铁路轨道在路基上休息时对列车荷载的响应。为此，轨道结构被分为两部分，其中一部分轨道被模拟为连续的Euler-Bernoulli梁，另一部分轨枕、道碴和路基被视为一个完整的集中质量系统。为了得到路基的质量和刚度，建立了道床金字塔模型，并对整个轨道系统的响应进行了研究。假设车辆是一个十自由度的集中质量系统。在时间域内求解车辆-轨道耦合系统的动力平衡方程，计算轨道在外加动载作用下的响应。作为研究的一部分，对路堤参数，即路堤高度、刚度和阻尼力进行了敏感性分析。数值模拟和灵敏度分析的结果表明，在上述参数中，路堤高度对路基的影响较大。
This paper investigates the response of railway track to train loads while rested on an embankment. For this purpose, track structure was divided into two parts, in one of which the rail was modelled as a continuous Euler–Bernoulli beam and in another sleeper, ballast and embankment were considered as an integrated lumped masses system. To obtain the mass and stiffness of embankment, the ‘ballast pyramid model' was developed and, consequently, the response of the whole track system was investigated. The vehicle was assumed to be a ten-degree-of-freedom lumped masses system. The dynamic equilibrium equations of the vehicle-track coupling system were solved in the time domain and the track response was evaluated against applied dynamic loads. As a part of the study, a sensitivity analysis was undertaken on embankment parameters, namely embankment height, stiffness and damping. The results of numerical modelling and sensitivity analysis reveal that, among the aforementioned parameters, embankment height had ...