桥上列车走行安全性的物理概念分析  

Physical Concept Analysis of Security of Moving Train on Bridge

作　　者：周智辉[1] 曾庆元[1] 向俊[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《桥梁建设》2004年第1期1-4,共4页Bridge Construction

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

摘　　要：分析指出桥上列车走行安全性主要是指桥上列车是否脱轨。提出桥上列车脱轨的力学本质是列车桥梁系统横向振动丧失稳定。基于系统平衡状态稳定性分析理论及车辆构架蛇行波为激振源的理论[4],提出了列车脱轨的能量增量判别准则。运用此准则,对老滦河桥下行线上列车脱轨实例及上行线上列车不脱轨实例进行了计算分析。结果表明对桥上列车走行安全性物理概念的认识是合理的,列车脱轨判别准则是可行的。The analysis in the paper considers that the security of moving train on bridge is directly related to the derailment of the train,and the mechanism of the derailment mechanics is in essence the buckling of lateral vibration of train-bridge system. On the basis of the theory for analyzing stability of equilibrium system, and the theory in which crawl wave of bogie is taken as the exciting source of the lateral vibration of the train-bridge system, the energy increment judgment rule is developed to determine the derailment of the train. With the rule herewith, an example of train derailment on the downline of an old bridge over Luanhe River, and another example of non-derailment of train on the upline of the same bridge are calculated and analyzed. The results manifest that the analysis of the physical concept of security of the moving train on bridge is reasonable and the energy increment rule is feasible for determining the derailment of the train.

关 键 词：列车 走行安全性 脱轨 物理学 稳定分析 能量法 

分 类 号：U270[机械工程—车辆工程]