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线路条件对高速列车轴箱轴承载荷特性影响研究

Research on the Influence of Line Conditions on the Load Characteristics of Axle Box Bearing of High-speed Train
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摘要 考虑到轴箱轴承长期受到来自轨道不平顺、线路、轮轨非线性接触和转向架以及车体振动的激扰影响,是高速列车旋转系统中易发生损坏的部件之一。为了更好地对轴箱轴承内部之间的相互作用进行分析,采用多体动力学仿真软件Recurdyn和Simpack建立了包含轴箱轴承子系统的车辆-轨道耦合动力学仿真模型,研究了在复杂轨道激扰下不同的线路条件对轴箱轴承载荷特性的影响。研究结果表明:在直线线路上,两列圆锥滚子与外圈、内圈大挡边之间的接触载荷峰值和趋势基本一致;在缓和曲线刚进入阶段,第1列滚子承受主要载荷,第2列滚子承受辅助载荷,且第1列滚子比第2列滚子更早进入承载区;在缓和曲线即将驶离阶段,第2列滚子承受主要载荷,第1列滚子承受辅助载荷,且第2列滚子比第1列滚子更早进入承载区;在曲线线路上,与缓和曲线即将驶离阶段受载规律相同,接触载荷波动趋于平稳。此外,在缓和曲线以及曲线线路上,负责主要承载的某列滚子同一瞬时进入承载区的相对于直线线路滚子数量有所增加。两列滚子与保持架接触载荷相对于直线线路条件波动更加复杂且在时间维度上无明显的先后顺序。总得来说,相对于直线线路,曲线线路轴箱轴承将承受更加剧烈以及更加复杂的周期性冲击,将使轴承更易发生损坏。 Considering that axle box bearing is susceptible to long-term disturbances from track irregularities,lines,wheel-rail nonlinear contact,and vibration of the bogie frame and carbody,it is one of the components that are prone to damage in the rotating system of high-speed trains.In order to better analyze the interaction between the interior of the axle box bearings,a vehicle-track coupled dynamics simulation model including the axle box bearing subsystem is established using multi-body dynamics simulation software Recurdyn and Simpack.The influence of different line conditions on the load characteristics of axle box bearing under complex track excitation is investigated.The results show that:on the straight line,the peak value and trend of the contact load between the two rows of tapered rollers and the outer ring,as well as the large retaining edge of the inner ring,are basically consistent.At the beginning of the transition curve,the main load is borne by the first row of rollers,and the auxiliary load is borne by the second row of rollers.The first row of rollers enters the bearing area earlier than the second row of rollers.In the stage when the transition curve is about to leave,the main load is borne by the second row of rollers,the auxiliary load is borne by the first row of rollers.The second row of rollers enters the bearing area earlier than the first row of rollers.On the curve line,the load law is the same as that of the transition curve when it is about to depart,and the fluctuation of contact load tends to stabilize.In addition,on the transition curve and the curve line,the number of rollers in a row of rollers responsible for the main load entering the bearing area at the same instant is increased compared with that of the linear line rollers.The contact load between the two rollers and the cage is more complicated than the condition fluctuation of the straight line,and there is no obvious chronological order in the time dimension.In general,compared with the straight line,the more severe and more complex periodic impact is borne by the axle box bearing on the curve line,which will make the bearing more prone to damage.
作者 郑志伟 易彩 廖小康 ZHENG Zhiwei;YI Cai;LIAO Xiaokang(State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031;School of Mechanical Engineering,Xihua University,Chengdu 610039)
出处 《机械工程学报》 EI CAS CSCD 北大核心 2024年第20期251-260,共10页 Journal of Mechanical Engineering
基金 国家自然科学基金(52272355) 国家重点研发计划(2023YFB4302000) 轨道交通运载系统全国重点实验室(2024RVL-T11) 中国博士后科学基金(2019M663899XB)资助项目。
关键词 高速列车 轴箱轴承 线路条件 载荷特性 high speed train axle box bearing line conditions load characteristics
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