桥上列车脱轨计算分析  

Computation and Analysis of Train Derailment on Bridge

作　　者：周智辉[1] 曾庆元[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《中国铁道科学》2004年第4期46-49,共4页China Railway Science

基　　金：铁道部科技研究开发计划项目(2001G029);国家自然科学基金项目(50078006)

摘　　要：在列车桥梁振动分析的计算模型基础上,进一步考虑了轮对与钢轨之间的相对位移大于游间时,轮缘爬上钢轨的接触状态,从而建立了桥上列车脱轨分析的计算模型。基于列车脱轨分析的能量随机分析理论,采用车桥系统输入能量增量与此系统抗力作功增量比较的能量增量准则,对老滦河桥下行线上列车脱轨实例和上行线上列车不脱轨实例进行了计算分析。分析结果与实际情况一致。Based on a computing model used for analysis of vibration of train-bridge system, a model is built for the analysis of train derailment on bridge in consideration of the case when the relative displacement between the wheel set and the rails is greater than the clearance and the contact condition of flange climbing. Based on the energy random analysis theory of train derailment, using the rule of energy increment of comparing the car-bridge system input energy increment with the work increment of resistance of the system, two examples are analyzed. One example is of derailment of train on the down-direction of old bridge on Luanhe River, and the other is of non-derailment of train in the up-direction of the same bridge. The analytical results are similar to the fact.

关 键 词：铁路桥梁 脱轨 能量随机分析理论 能量增量准则 

分 类 号：U270.11[机械工程—车辆工程]