反向曲线铁路桥梁车桥耦合动力分析研究

Analysis and Study of Train-bridge Coupling Dynamic of Anti-curve Railway Bridge System

研究目的：铁路桥梁设在反向曲线上时,相关规范要求需进行充分论证。本文以某车站扩能改造工程中由于受到地形条件限制而设计的反向曲线铁路桥梁为例,采用MSC.PATRAN和ADAMS/RAIL分析软件,分别建立完整的桥梁和列车三维空间模型,分析CRH1动车组在不同车速条件下通过该桥的车桥耦合振动情况。研究结论：（1）通过对桥梁各跨的纵、横向位移,加速度以及脱轨系数、轮重减载率、车体加速度、Sperling舒适性指标等动力性指标计算结果的分析可以得到：CRH1动车组以70-90 km/h速度通过该反向曲线铁路桥梁时,车辆的脱轨系数和轮重减载率随着车辆的行驶速度增加而增加,桥梁各跨的竖向和横向振动位移较小,桥梁竖向和横向振动加速度小于规范规定的限值;（2）该桥梁具有较大的纵、横向刚度,满足列车运行的安全性及舒适性要求;（3）由于受到地形条件限制而设计的反向曲线桥梁方案是可行的;（4）本研究成果能够为位于反向曲线的铁路桥梁车桥耦合振动研究提供参考。

Research purposes： When the railway bridge is designed in an anti -curve, it should be fully demonstrated according to the requirements of the relevant regulations. This paper took a station expansion project by the anti - curve railway bridge terrain conditions design as an example, using MSC. PATRAN and ADAMS/RAIL analysis software, built a complete three - dimensional model of bridge and train, analyzed the train - bridge coupling vibration about CRHI bullet train through the anti -curve bridge under different speed conditions. Research conclusions ： （ 1 ） Through analyzing of the calculation results, such as the displacement and acceleration of bridge,derailment coefficient, reduction rate of wheel, acceleration and sperling index, we can draw the following conclusions： when the CRH1 bullet train running with 70 -90 km/h speed through the anti -curve railway bridge, the train＇s derailment coefficient and reduction rate of wheel increases as the train speed rises, the bridge＇s vertical and lateral vibration displacement is small, the bridge＇s vertical and lateral vibration acceleration is less than the specified limit. （2）The anti -curve bridge has enough vertical and lateral stiffness for the train running safety and the passenger riding comfort. （3）The anti -curve bridge scheme designed due to topographical condition is feasible. （4）The research results can provide good references and guidances for the study of train - bridge coupling vibration of anti - curve of railway bridge.