高速铁路无砟轨道疲劳检算轮载的动力学分析  

Dynamic analysis of fatigue check load for ballastless track in high-speed railway

作　　者：蔡成标[1] 朱胜阳[1] 刘秀波[2] 杨飞[2] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610031 [2]中国铁道科学研究院基础设施检测研究厅,北京100081

出　　处：《中国科学：技术科学》2014年第7期707-713,共7页Scientia Sinica(Technologica)

基　　金：国家重点基础研究发展计划(2013CB036202;2013CB036205);国家高技术研究发展计划(2011AA11A103-3)资助项目

摘　　要：应用列车-线路耦合动力学理论及仿真软件,分析了高速运营线路轮轨系统动力学响应并与实测结果进行了验证.在此基础上,采用我国典型高速车辆及无砟轨道结构,系统分析了高速铁路无砟轨道不平顺谱对轮轨动作用力大小及统计特性的影响规律.结果表明,列车-线路耦合动力学方法可以比较准确地模拟高速行车条件下轮轨动力相互作用,取百分位数75的无砟轨道谱作为激励输入可用于评估轮轨系统动力相互作用及高速行车安全性和舒适性,高速铁路无砟轨道结构的疲劳检算取为静轮重的1.5倍是合理的.The dynamic response of wheel-rail system is analyzed and validated with field measured results based on vehicle-track coupled dynamic theory and the simulation software. Further, the effect of ballastless track irregularity spectra of high-speed railway on wheel-rail interaction forces and statistical characteristics is investigated systematically using a typical Chinese high-speed train and a ballastless track. Research results show that the vehicle-track coupled dynamic method can well simulate the wheel-rail interaction under high-speed driving conditions. The ballastless track spectra of the percentile 75 can be adopted as excitation inputs for evaluating the wheel-rail interaction, and the riding safety and comfort under high-speed driving conditions. The reasonable fatigue check load of ballastless tracks in high-speed railway is 1.5 times as large as static wheel load.

关 键 词：高速铁路 无砟轨道 不平顺谱 车辆-轨道耦合动力学 轮轨垂向力 疲劳荷载 

分 类 号：U213.244[交通运输工程—道路与铁道工程]