加固路基-列车耦合系统地震响应及安全性分析

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (14) : 148-155.

论文

杨勋1，楼云锋2，时亚州3，陈荣4，金先龙5

作者信息 +

Dynamic response and running safety evaluation of a strengthened embankment-train system during earthquake

YANG Xun 1，LOU Yunfeng 2, SHI Yazhou 3,CHEN Rong 4, JIN Xianlong 5

Author information +

文章历史 +

摘要

以某计划铺设路基线路为研究对象，考虑黏-弹性人工边界、土壤的非线性、结构间动态接触，建立了列车-路堤-土体耦合系统有限元模型。采用Drucker-Prager材料本构，并进行修正。轮对和钢轨采用双向对称接触方式在轮对与钢轨表面间建立垂向接触对和侧向接触对，轮轨间作用力采用罚函数方法计算。提出了软土地基加固方案，对比分析了地基加固前后，列车-路堤-地基系统的地震响应；讨论了软土路基震后残余变形对列车地震脱轨安全性的影响程度及规律。计算结果表明：地基加固对地震激励下列车-轨道结构动力响应以及列车运行安全性影响显著，加固后脱轨系数、轮重减载率和车体加速度均显著减小。

Abstract

Taking a subgrade line and the running train as research objects, a finite element model of the train-embankment-soil dynamic coupling system was established taking account of the nonlinear material behavior of soil, the viscous-spring artificial boundary, and the dynamic contact between structures.The Drucker-Prager material model was adopted and modified.Making use of the penalty function, the vertical contact interface and the lateral contact interface between the wheel and the rail surface were considered as automatic surface-to-surface contact.The seismic responses of the embankment foundation before and after reinforcement were analyzed.The influence of residual deformation after earthquake on the derailment safety of the running train was discussed.The results show that the dynamic responses of the train and the safety of running train subjected to earthquake are significantly affected by the reinforcement of soft subgrade.After strengthening, the derailment factor, the offload ratio, and the acceleration of the vehicle body are significantly reduced.

导出引用

杨勋1，楼云锋2，时亚州3，陈荣4，金先龙5. 加固路基-列车耦合系统地震响应及安全性分析[J]. 振动与冲击, 2020, 39(14): 148-155

YANG Xun 1，LOU Yunfeng 2, SHI Yazhou 3,CHEN Rong 4, JIN Xianlong 5. Dynamic response and running safety evaluation of a strengthened embankment-train system during earthquake[J]. Journal of Vibration and Shock, 2020, 39(14): 148-155

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