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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Prediction of railway ground vibrations: Accuracy of a coupled lumped mass model for representing the track/soil interaction
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Prediction of railway ground vibrations: Accuracy of a coupled lumped mass model for representing the track/soil interaction

机译：铁路地面振动的预测：表示轨道/土壤相互作用的耦合集总质量模型的准确性

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摘要

Recent advances in railway-induced ground vibrations showed that the track/soil interaction plays an important role in the low frequency range. This paper contributes to the numerical analysis of train/track/foundation dynamics by presenting the accuracy of a coupled lumped mass (CLM) model devoted to the railway foundations and to the track/soil coupling. Following a summary of the background and the advantages of the CLM model, the coupling strategy is quantified through two application cases. Firstly, the dynamic track deflection is calculated for different railway lines considering various degrees of complexities of foundations. Then, the foundation responses are compared depending on whether detailed coupling is introduced or not. The benefit of the proposed model is emphasized by presenting free-field ground vibration responses generated by a tram and a high-speed train, obtained by a revisited two-step prediction model developed by the authors. (C) 2014 Elsevier Ltd. All rights reserved.
机译：铁路引起的地面振动的最新进展表明，轨道/土壤相互作用在低频范围内起着重要作用。本文通过介绍专用于铁路基础和轨道/土体耦合的集总质量（CLM）模型的准确性，为列车/轨道/地基动力学的数值分析做出了贡献。在总结了CLM模型的背景和优点之后，通过两个应用案例对耦合策略进行了量化。首先，考虑了各种复杂程度的地基，计算了不同铁路线的动态轨道挠度。然后，根据是否引入详细的耦合来比较基础响应。通过提出由电车和高速火车产生的自由场地面振动响应（通过作者重新开发的两步预测模型获得），从而强调了所提出模型的优势。 （C）2014 Elsevier Ltd.保留所有权利。

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