列车脱轨机理与脱轨分析理论研究  

Study on the Mechanism and the Analysis Theory of Train Derailment(Abstract of the Ph.D.Dissertation)

作　　者：向俊[1] 曾庆元[1] 

机构地区：[1]中南大学土木建筑学院,博导湖南长沙410075

出　　处：《中国铁道科学》2008年第1期127-129,共3页China Railway Science

基　　金：国家重点基础研究发展计划资助项目(2007CB714706);国家自然科学基金资助项目(50678176;50078006);铁道部科技研究开发计划项目(2001G029;2003G043);高等学校博士学科点专项科研基金资助项目(20010533004)

摘　　要：The major problems existing in the derailment studies are summarized according to analysis of the research status about train derailment in China and other countries of the world.(1) The current criteria for preventing derailment cannot assure that derailment will not occur.(2) It is not clear for train derailment mechanism.(3) There exist three fundamental problems in the calculation of train derailment as follows: ① The connecting condition of displacement between wheel and rail cannot be satisfied in establishment and solution of vibration equation group of train-track(bridge) time-variant system.② Only the lateral track irregularity is regarded as the exciting source of lateral vibration of train-track(bridge) time-variant system.The true exciting source,i.e.the wheel and rail contact status is neglected.③ The random lateral vibration of train-track (bridge) time-variant system is analyzed according to the random track irregularity and analysis theory of random vibration of time-invariant system.But the maximum responses of lateral vibration of train-track(bridge) time-variant system cannot be calculated,and furthermore train deraiment cannot be forecasted.The thinking and methods for solving these problems are also introduced.The train derailment mechanism,which is the result of losing stability in lateral vibration status of train-track(bridge) time-variant system,is proposed for the first time by analysis of characteristics of self-excitation of train vibration and losing stability in self-excitation vibration status of train derailment.So the key to analyzing train derailment is to analyze the stability of lateral vibration of train-track(bridge) time-variant system.The following conclusions are made by summarizing the existing analysis theory of stability of static and dynamic system.(1) Because of the characteristics of time-variant and self-excitation of train-track(bridge) system,the stability of lateral vibration of the system cannot directly be analyzed by the existing analysis theory of stabiThe major problems existing in the derailment studies are summarized according to analysis of the research status about train derailment in China and other countries of the world. （1） The current criteria for preventing derailment cannot assure that derailment will not occur. （2） It is not clear for train derailment mechanism. （3） There exist three fundamental problems in the calculation of train derailment as follows： （1） The connecting condition of displacement between wheel and rail cannot be satisfied in establishment and solution of vibration equation group of train-track （bridge） time variant system. （2） Only the lateral track irregularity is regarded as the exciting source of lateral vibration of train track （bridge） time-variant system. The true exciting source, i. e. the wheel and rail contact status is neglected. （3） The random lateral vibra tion of train-track （bridge） time-variant system is analyzed according to the random track irregularity and analysis theory of random vibration of time-in variant system. But the maximum responses of lat eral vibration of train-track （bridge） time-variant system cannot be calculated, and furthermore train deraiment cannot be forecasted. The thinking and methods for solving these problems are also introduced. The train derailment mechanism, which is the result of losing stability in lateral vibration status of train-track （bridge） time variant system, is proposed for the first time by analysis of characteristics of self-excitation of train vibration and losing stability in self-excitation vibration status of train derailment. So the key to analyzing train derailment is to analyze the stability of lateral vibration of train-track （bridge） time-variant system. The following conclusions are made by summarizing the existing analysis theory of stability of static and dynamic system. （1） Because of the characteristics of time-variant and self-excitation of train track （bridge） system, the stability of lateral

关 键 词：列车脱轨 脱轨机理 能量增量准则 构架蛇形波 脱轨控制 预防措施 预防标准 脱轨报警器 脱轨预警系统 

分 类 号：U211.5[交通运输工程—道路与铁道工程]