摘要
动车运行过程中齿轮箱受载情况十分复杂,箱体出现裂纹的情况时有发生。为保证齿轮箱箱体服役安全,文章在SIMPACK中建立了含有齿轮传动系统的某动车动力学模型,动车运行速度设为200 km/h、250km/h、300km/h和350km/h,对比4种速度下只考虑轨道激励与考虑齿轮内部和轨道双激励时齿轮箱刚性箱体的振动响应,同时建立考虑齿轮箱箱体柔性的某动车刚柔耦合动力学模型,分析其对齿轮箱箱体振动计算结果的影响。结果表明:齿轮箱内部激励对箱体横向振动加速度影响不大,但在主动齿转频与齿轮啮合频率处箱体垂向振动加速度会产生峰值,使其方均根值显著增加,平均增量为4.8m/s^(2)。在200km/h时主动齿转频与齿轮箱箱体点头模态频率相近引发共振,使得箱体垂向振动加速度方均根值增量异常显著,因此在分析齿轮箱箱体振动时齿轮箱内部激励不可忽略;齿轮箱箱体柔性对考虑齿轮箱内部激励时的箱体横向振动加速度影响不大,但会使垂向振动加速度方均根值有所减小,在速度达到300 km/h后减小量较大,平均减小量为2.72m/s^(2)。
During the operation of high-speed trains,the loads on the gearbox are very complex,and cracks often occur in the boxbody.To ensure the service safety of the gearbox body,a dynamic model of high-speed trains with a gear transmission system was established based on SIMPACK.Comparative analysis of the vibration response of the gearbox rigid body at speeds of 200 km/h,250 km/h,300 km/h and 350 km/h was conducted,considering only track excitation and both gears internal excitation and track excitation.In addition,a rigid-flexible coupling dynamic model of a high-speed train considering a flexible gearbox body was established to analyze its impact on the vibration calculation results of the gearbox body.The results indicate that the internal excitation of the gearbox has a little impact on the lateral vibration acceleration of the gearbox body,but at the rotational frequency of the driving gear and the engagement frequency of the gears,the vertical vibration acceleration of the gearbox body will exhibit a peak value,which significantly increases its root mean square value,with an average increment of 4.8 m/s^(2).At a speed of 200 km/h,the resonance is caused by the similarity between the rotational frequency of the driving gear and the modal frequency of the gearbox pitching,resulting in a very significant increase in the root mean square value of the vertical vibration acceleration of the gearbox body.Therefore,when analyzing the vibration of the gearbox body,the internal excitation of the gearbox cannot be ignored.The flexibility of the gearbox body has a little impact on the lateral vibration acceleration of the gearbox body when considering the internal excitation,but it will reduce the root mean square value of the vertical vibration acceleration to some extent.The average reduction after the speed reaches 300 km/h is large,reaching 2.72 m/s^(2).
作者
于宏达
刘加蕙
黄志辉
田明洁
YU Hongda;LIU Jiahui;HUANG Zhihui;TIAN Mingjie(State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu,Sichuan 610031,China)
出处
《机车电传动》
2024年第3期45-52,共8页
Electric Drive for Locomotives
基金
国家自然科学基金项目(U19A20109)。
关键词
高速动车组
齿轮传动系统
齿轮箱
振动响应
共振
high-speed train
gear transmission system
gearbox
vibration response
resonance
