摘要
在高速列车齿轮箱的动力学研究中,由于齿轮传动系统的结构特殊性,难以直接通过传感器测试得到其动态响应,为此通过仿真建立了包含齿轮传动系统和齿轮箱箱体有限元模型的整车动力学模型。根据齿轮传动系统参数和扁疤车轮参数,建立了齿轮箱内外激扰模型。对不同工况下的齿轮箱动态特性进行计算,结果表明:车轮扁疤对于高速列车齿轮传动系统的平稳啮合有恶劣影响,当扁疤激扰达到一定程度时,甚至会引起啮合脱离并造成冲击;箱体的不同位置由于其特征模态的不同而对扁疤激扰的敏感度不同,其中箱体底部和油位观察孔处的应力与扁疤长度正相关性较高,应力和变形较大,为危险区域;车轮扁疤对箱体动应力的影响比齿轮箱内部激扰大,相比箱体内部激扰,车轮扁疤对箱体裂纹的形成有更大影响。
In dynamic study of high-speed train gearbox,it＇s hard to obtain the dynamic responses of gear transmission system directly by sensor due to its special structure.In order to solve this problem,a vehicle dynamic model including gear transmission system and gearbox housing finite element model is set up through simulation.According to parameters of gear transmission system and flat wheel,an internal-external excitation model of gearbox is established.Dynamic characteristics of gearbox under different conditions are calculated.The results show that the wheel flat has adverse effect on smooth meshing of high-speed train gear transmission system.When wheel flat excitation reaches a certain degree,gear meshing disengagement would be caused and led to impact in the same time.The sensitivity of different positions of gearbox to wheel flat is different because of different eigenmode of it.The stresses of regions around housing bottom and oil sight glass are greatly proportional to the flat length,the stresses and deformations of these regions are great,which are dangerous regions.The wheel flat has greater impact on dynamic stress of gearbox housing than internal excitation of gearbox.Compared with internal excitation of gearbox,wheel flat has greater influence on cracking initiation of gearbox housing.
作者
邹航宇
张卫华
王志伟
ZOU Hangyu;ZHANG Weihua;WANG Zhiwei(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031 Sichuan,China)
出处
《铁道机车车辆》
北大核心
2018年第3期29-33,40,共6页
Railway Locomotive & Car
基金
国家重点研发计划课题(2016YFB1200401)
中国铁路总公司科技研究开发计划课题(2016J007-B)
