【摘要】 探讨了影响桥上与线路上列车脱轨的关键因素,同时统计了最近几年发生在世界各地的脱轨事故,发现有一个呈上升的趋势.论述了列车脱轨的原因分析、列车脱轨几何准则和力学机理,然后从五个方面分析了桥上与线路上列车脱轨之间的不同之处.从列车脱轨的横向刚度、脱轨时间历程、流场、运动方程和共振等方面进行了对比分析,并从中得出了一些结论.在某一特定距离上,线路列车脱轨没有时程特性.另外风载荷作用下,车桥系统的力学特性比车线系统更加复杂.更多还原

【Abstract】 The key factors involved in the train derailment on bridges or lines have been discussed in this paper.Also the statistics of derailment accidents with an upward trend occurred in recent years,all over the world,are listed.Analysis of the reasons for train derailment,geometric criterion and mechanical mechanism of train derailment are discussed.Then the authors make an analysis of difference of train derailment between bridges and lines from five aspects.The conclusions have been drawn from the comparative analysis of train derailment involved in lateral stiffness,derailment time history,flow field,motion equation and resonance.There is no characteristic of time history for a certain distance on line derailment.And the mechanical characteristics of vehicle-bridge system are more complicated than the vehicle-line system under wind loads.更多还原