高速列车谐波磨耗车轮滚动接触疲劳特性分析  

Analysis of Harmonic Wear Wheels/Rail Rolling Contact Fatigue of High Speed Train

作　　者：肖乾[1,2] 郑继峰[1] 昌超[1] 方骏[1] XIAO Qian ZHENG Jifeng CHANG Chao FANG Jun(Key Laboratory for Conveyance and Equipment of the Education Ministry of China, East China Jiaotong University, Nanchang Jiangxi 350013, China State Key Laboratory of Traction Power, Southwest China Jiaotoug University, Chengdu Sichuan 610031, China)

机构地区：[1]华东交通大学载运工具与装备教育部重点实验室,江西南昌330013 [2]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《润滑与密封》2017年第1期1-7,14,共8页Lubrication Engineering

基　　金：国家自然科学基金项目(51565013);牵引动力国家重点实验室开放课题(TPL1407)

摘　　要：为研究高速列车谐波磨耗车轮滚动接触疲劳特性,建立谐波磨耗车轮高速轮轨滚动接触数值分析模型。该模型考虑了车辆系统的一、二系非线性悬挂力、轮轨非线性接触几何关系并考虑了钢轨振动及轮轨间的激励响应对接触蠕滑的影响。以CRH2型高速列车为研究对象,运用多体动力学软件UM参数化建立其动力学数值模型;对实测统计数据中最常见的1阶、6阶和11阶谐波磨耗以及波深0.1 mm和0.3 mm下车轮的蠕滑率/力进行分析;以不同阶数、波深车轮的蠕滑特性参数为疲劳模型的输入参数,研究谐波磨耗车轮的疲劳特性。结果表明:无谐波磨耗车轮处于弹性安定状态,1阶波深0.1 mm和0.3 mm车轮和6、11阶波深0.1 mm车轮都处于棘轮效应状态,6、11阶波深0.3mm处于塑性安定状态;低阶小波深车轮以疲劳为主,高阶大波深车轮以磨耗为主;与阶数相比,滚动接触疲劳、磨耗对波深的变化更为敏感,波深的增加会促进车轮蠕滑力/率的进一步快速增大,从而车轮的切向力迅速增大。In order to study the rolling contact fatigue of harmonic wear wheels of high-speed train ,the coupling model combing the harmonic wear wheel-track system dynamics with wheel circumference predicting fatigue model was established.In the model,first and second nonlinear suspension force of the vehicle system, nonlinear wheel/rail contact geometry were taken into account and the effects of the wheel/rail incentives and rail vibration response on wheel/rail contact creep were also considered.With CRH2 high-speed train as the research object,its dynamics model of rail was established by using multibody dynamics software UM.The wheel creep rate and creep force were analyzed on the most common statistical data,the 1st order,3rd order,6th order and l l th orders of harmonic wear and the wave depth of 0. 1 mm and 0. 3 mm. The harmonic abrasion wheel fatigue characteristics were studied by using the wheel creep characteristic parameters in a different order number and wave depth as the input parameters of the fatigue model. Results show that no harmonic wear wheel is in the elastic stability state, the 1 st order harmonic wear wheels with wave depth of 0. 1 mm and 0.3 mm, and the 6th order and llth order harmonic wear wheels with wave depth of 0. 1 mm are in a state of ratchet effect,the 6th order and llth order harmonic wear wheels with wave depth of 0. 3 mm are in the plastic stability state.So the low-order and lowwave depth wheel is given priority to fatigue, high-order and big-wave depth wheel is given priority to abrasion.The rolling contact fatigue and wear of the wheels are more sensitive to the change of wave depth than the change of order,the increase of wave depth will cause the rapid increasing of wheel creep force and creep rate, as well as the tangential force.

关 键 词：滚动接触疲劳 谐波磨耗 瞬态接触特性 蠕滑率 

分 类 号：TH117[机械工程—机械设计及理论]