Abstract: Wheel-rail complex excitation has a significant effect on the dynamic behavior of faulty axlebox bearing during the train operation. Firstly, this paper uses the Universal Mechanism(UM)software to establish a vehicle-track dynamic model, and obtains the vertical, longitudinal and lateral loads of axlebox bearing under wheel-rail complex excitation based on the verification of vehicle models for stability, smoothness and safety. Secondly, the dynamic model of axlebox bearing with inner race spalling is established via Solidworks and ADAMAS softwares, and the accuracy of the proposed model is verified by comparison with the axlebox bearing experiments on the roll-vibration test bench. The dynamic simulation analysis shows that the contact load of the roller and inner race of the fault side is greater than that of the non-faulty side and the normal bearing, the cage vibration of the fault side is greater than that of- DOI:10.3969/j.issn.1000-1565.2023.06.001轮轨激励条件下轴箱轴承内圈故障振动特性分析邓飞跃^1,2,王红力¹,高瑞洋¹,李浩¹(1.石家庄铁道大学 机械工程学院,河北 石家庄 050043;2.河北省工程机械动力与传动控制重点实验室,河北 石家庄 050043)摘 要:高速列车运行过程中,轮轨复杂激励会对轴箱轴承的动力学行为产生不可忽视的影响.首先利用UM(universal mechanism)软件建立车辆-轨道动力学模型,在对车辆模型进行稳定性、平稳性和安全性验证的基础上,获取了复杂激励下轴箱轴承所受的垂向、纵向和横向载荷;然后,通过Solidworks软件和ADAMS软件建立了轴箱轴承内圈剥离故障动力学模型,通过与滚振实验台轴箱轴承实验对比,验证了所提模型的准确性.通过动力学仿真分析可知,轴箱轴承故障侧的滚子与内圈接触载荷大于非故障侧与正常轴承,故障侧保持架的振动大于非故障侧与正常轴承,内圈故障冲击加剧了轴承保持架与外圈的质心波动.最后,进一步对比考虑轮轨激励下与定载荷下故障轴承仿真结果发现,受轮轨激励的影响轴承内部各个元件间的接触载荷显著增大,轴承保持架与外圈质心运动轨迹盒维数显著增大.研究成果对揭示实际工况下高速动车组轴箱轴承内部元件振动特性规律具有重要意义.关键词:轴箱轴承;轮轨激励;振动特性;内圈故障中图分类号:TH17 文献标志码:A 文章编号:1000-1565(2023)06-0561-10Vibration characteristics analysis of the inner race fault of axlebox bearing under wheel-rail excitationDENG Feiyue^1,2,WANG Hongli¹,GAO Ruiyang¹,LI Hao¹(1.School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043,China;2.Hebei Key Laboratory of Mechanical Power and Transmission Control,Shijiazhuang 050043,China)Abstract: Wheel-rail complex excitation has a significant effect on the dynamic behavior of faulty axlebox bearing during the train operation. Firstly, this paper uses the Universal Mechanism(UM)software to establish a vehicle-track dynamic model, and obtains the vertical, longitudinal and lateral loads of axlebox bearing under wheel-rail complex excitation based on the verification of vehicle models for stability, smoothness and safety. Secondly, the dynamic model of axlebox bearing with inner race spalling is established via Solidworks and ADAMAS softwares, and the accuracy of the proposed model is verified by comparison with the axlebox bearing experiments on the roll-vibration test bench. The dynamic simulation analysis shows that the contact load of the roller and inner race of the fault side is greater than that of the non-faulty side and the normal bearing, the cage vibration of the fault side is greater than that of- 收稿日期:2023-06-13 基金项目:国家自然科学基金资助项目(12272243); 河北省研究生专业学位精品教学案例库项目(KCJPZ2023037) 第一作者:邓飞跃(1985—),男,河北石家庄人,石家庄铁道大学副教授,博士,博士生导师,主要从事机电系统故障诊断与状态监测研究.E-mail:dengfy@stdu.edu.cn第6期邓飞跃等:轮轨激励条件下轴箱轴承内圈故障振动特性分析the non-faulty side and the normal bearing, and the fault impact aggravates the trajectory of the mass center fluctuation of the bearing cage and outer ring. Finally, further comparison of the simulation results under the consideration of wheel-rail excitation and the constant load condition reveals that the contact load between the bearing components is significantly increased by the wheel-rail excitation,and the trajectories of the mass center for the bearing cage and outer ring fluctuate more drastically. The research results are of great significance in revealing the vibration characteristics law of the bearing internal components of faulty axlebox bearing under actual operating conditions.

Key words: axlebox bearing, wheel-rail excitation, vibration characteristics, inner race fault