齿条接缝冲击作用下齿轨系统关键载荷特性分析  

Analysis on Key Load Characteristics of Rack Rail System under the Influence of Rack Joint Impact

作　　者：杨国军 陈再刚 陈志辉 杨吉忠 YANG Guojun;CHEN Zaigang;CHEN Zhihui;YANG Jizhong(State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu Sichuan 610031,China;Science and Technology Research Institute,China Railway Eryuan Survey and Design Group Co.,Ltd.,Chengdu Sichuan 610031,China)

机构地区：[1]西南交通大学轨道交通载运系统全国重点实验室,四川成都610031 [2]中铁第二勘察设计院集团有限公司科学技术研究院,四川成都610031

出　　处：《中国铁路》2024年第9期153-160,共8页China Railway

基　　金：四川省科技计划资助项目(2024NSFTD0011)。

摘　　要：齿条接缝冲击直接作用于车辆-轨道耦合系统,能够显著改变系统载荷特性。为探究齿条接缝冲击作用对轨道系统关键载荷特性的影响,首先基于车辆-轨道耦合动力学理论建立齿轨车辆-轨道耦合动力学模型;其次基于齿轮啮合特性,分析齿条接缝处齿距偏差与线外啮入冲击力间的量化关系;最后分析不同列车运行速度下,齿条接缝处轨道系统载荷特性。研究表明,齿条接缝处齿距偏差及列车运行速度对齿轨系统载荷特性具有重要影响,为防止齿条接头处屈服变形,建议列车运行速度30 km/h时齿条接缝处齿距偏差应控制在4 mm以下。研究成果可为运维部门制定齿轨铁路养护标准提供理论参考。The rack joint impact directly acts on the vehicle-track coupling system,which can significantly change the load characteristics of the system.In order to explore the influence of rack joint impact on key load characteristics of track system,firstly,a vehicle-track coupling dynamics model of rack railway is established based on the theory of vehicle-track coupling dynamics;secondly,the quantitative relationship between pitch deviation at rack joint and out-of-line meshing impact force is analyzed based on gear meshing characteristics;finally,the load characteristics of track system at rack joint under different train operation speeds are analyzed.The study indicates that the pitch deviation at the rack joint and the train operation speed have a significant influence on load characteristics of the rack rail system.In order to prevent yield deformation at the rack joint,it is recommended that the pitch deviation at the rack joint should be less than 4 mm when the train operation speed is 30 km/h.The study results can provide a theoretical reference for the O&M department to formulate maintenance standards for rack railway.

关 键 词：齿轨铁路 车辆-轨道耦合动力学 齿条接缝 啮合力 载荷特性 齿距偏差 

分 类 号：U234[交通运输工程—道路与铁道工程]