一种轮边电驱动单元载荷的分布研究  

A study on the load distribution of wheel-side electric driving reducer

作　　者：郑松林[1,2] 梁国清 冯金芝[1,2] 刘新田[1] 

机构地区：[1]上海理工大学机械工程学院,上海200093 [2]机械工业汽车底盘机械零部件强度与可靠性评价重点实验室,上海200093

出　　处：《现代制造工程》2013年第12期10-15,共6页Modern Manufacturing Engineering

基　　金：国家自然科学基金项目(50875173);国家863重大项目(2011AA11A265;2012AA110701);上海市科委基础研究重点项目(11140502000;10JC1411600);上海汽车工业科技发展基金项目(1104);上海市教委重点学科建设项目(J50503)

摘　　要：以上海市区道路行驶循环工况所得载荷作为某轮边/轮毂减速式电驱动单元工作载荷样本来源,经统计分析,其载荷幅值、均值均服从混合分布。结合雨流疲劳统计计数法,引进疲劳计数法(Gear Counting Method,GCM),对电驱动单元输入扭矩进行循环计数,进而采用电驱动单元齿轮扭矩、转速双信号等间隔同步采样法,统计分析了电驱动单元齿轮工作载荷。建立载荷的混合分布模型并对比分析拟合优度假设检验效果,最后对极值载荷进行外推处理。这一研究成果将为轮边/轮毂电驱动单元的耐久性和可靠性试验的载荷分析提供参考,也将为电驱动单元关键零/部件(如齿轮等)的损伤计算、寿命评估、可靠性设计和轻量化设计研究等提供数据支撑。Service load of a wheels-side electric driving unit comes from the load deduced from the driving cycle of automobile in Shanghai. By statistical analysis ,the result shows that both range and mean of load are governed by a mixture distribution. Com- bined with the rain flow fatigue counting, the Gear Counting Method （GCM） is introduced to cycle count the input torque of the electric driving unit, and then, gear load spectra are presented, in which two electric driving unit signals of gear torque and rota- tional speed were sampled synchronous with uniformly-spaced time. After that, the mixture distribution model is established and the hypothetic test has been proposed. Finally, extreme load extrapolation is performed. It will be useful for wheels-side electric driving reducer to compile spectrum when conducting the durability and reliability test in the laboratory, furthermore, also support- able for the damage calculation, the lifetime evaluation, reliability design and weight reduction design of the key parts in the elec- tric driving unit.

关 键 词：道路循环 轮边电驱动单元 疲劳计数法(GCM) 载荷分布 

分 类 号：TH16[机械工程—机械制造及自动化]