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非一致地震激励下列车-轨道-桥梁耦合振动模型

雷虎军,  李小珍

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文章导航 > 西南交通大学学报  > 2013 >  26(5): 803-809.
雷虎军, 李小珍. 非一致地震激励下列车-轨道-桥梁耦合振动模型[J]. 西南交通大学学报, 2013, 26(5): 803-809. doi: 10.3969/j.issn.0258-2724.2013.05.004
引用本文: 雷虎军, 李小珍. 非一致地震激励下列车-轨道-桥梁耦合振动模型[J]. 西南交通大学学报, 2013, 26(5): 803-809. doi: 10.3969/j.issn.0258-2724.2013.05.004
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LEI Hujun, LI Xiaozhen. Dynamic Model for Train-Track-Bridge Coupling System Subjected to Non-uniform Seismic Excitation[J]. Journal of Southwest Jiaotong University, 2013, 26(5): 803-809. doi: 10.3969/j.issn.0258-2724.2013.05.004
Citation: LEI Hujun, LI Xiaozhen. Dynamic Model for Train-Track-Bridge Coupling System Subjected to Non-uniform Seismic Excitation[J]. Journal of Southwest Jiaotong University, 2013, 26(5): 803-809. doi: 10.3969/j.issn.0258-2724.2013.05.004
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非一致地震激励下列车-轨道-桥梁耦合振动模型

doi: 10.3969/j.issn.0258-2724.2013.05.004
基金项目: 

教育部新世纪优秀人才支持计划资助项目(NCET-10-0701)

国家863计划资助项目(2011AA11A103)

国家973计划资助项目(2013CB036301)

四川省杰出青年学术技术带头人计划资助项目(2010JQ0018)

Dynamic Model for Train-Track-Bridge Coupling System Subjected to Non-uniform Seismic Excitation

    摘要
  • 摘要: 为探讨行波效应对地震作用下高速铁路桥上列车行车安全性的影响,基于列车-轨道-桥梁动力相互作用理论,采用35个自由度的机车车辆模型、板式无砟轨道模型和桥梁有限元模型,通过引入地震多点激励模式,建立了非一致地震激励下的列车-轨道-桥梁耦合振动模型,并编制了相应的仿真分析程序.以跨度32 m的简支梁桥为例,输入El Centro地震波,计算了一致激励和行波激励下车桥系统的动力响应.结果表明:行波效应对耦合系统动力响应幅值的影响很大.当车速为350 km/h、行波速度为300 m/s时的脱轨系数、轮重减载率和轮轨横向力比一致激励分别降低84.1%、19.5%和87.8%.因此,忽略行波效应可能造成对地震时桥上列车行车安全的误判.

     

    Abstract: In order to analyze the effects of traveling wave effect on the running safety of a train running over a high-speed railway bridge subjected to earthquake action, a dynamic model for train-track-bridge system subjected to non-uniform seismic excitation was set up based on the train-track-bridge dynamic interaction theory and by introducing a seismic multi-support excitation mode. This dynamic model consists of a vehicle model with 35 degrees-of-freedom, a slab track model and an FEM (finite element method) bridge model. A simulated analysis program was compiled. As an example, a simply-supported beam bridge with a span of 32 m was modeled, and the dynamic responses of vehicle and bridge system under uniform and non-uniform El Centro seismic excitations were calculated. The analysis results show that the traveling wave effect has a great influence on the dynamic responses' amplitudes of the coupling system. When the train speed is 350 km/h and traveling wave speed is 300 m/s, the derailment coefficient, the wheel unloading rate and the wheel-rail lateral force reduce by 84.1%, 19.5% and 87.8% respectively compared with uniform seismic excitation. So, when the traveling wave effect is ignored, the judgment of the running safety of a train passing a bridge under earthquake action may be wrong.

     

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    • 参考文献(15)
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出版历程
  • 收稿日期:  2013-01-15
  • 刊出日期:  2013-10-25

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