基于道路载荷谱的城市公交车辆传动耐久性试验方法  

Transmission Durability Testing Method of Bus Based on Road Load Spectrums

作　　者：米林[1] 彭逸[1] 谭伟[1] 王苏磊 

机构地区：[1]重庆理工大学汽车零部件先进制造技术教育部重点实验室,重庆400054

出　　处：《重庆理工大学学报（自然科学）》2017年第4期15-20,共6页Journal of Chongqing University of Technology：Natural Science

摘　　要：城市公交车辆行驶路线相对固定,道路载荷重复性高。为了更精确地评估城市公交车辆传动耐久性,提出了基于用户载荷谱的新型测试方法。首先,采集某时段的城市公交车辆在行驶过程中的变速器输出轴道路载荷谱,结合行驶挡位,将道路载荷分解到变速器输入轴,计算其行驶里程中其各挡位的输入轴载荷分布情况,细化到不同载荷等级区间,并计算频次。其次,采用等效损伤理论,将不同等级的载荷等效至最大损伤载荷并折算加载循环次数。最后,根据设计行驶里程与实际道路载荷谱行驶里程,外推最大损伤载荷下的循环加载次数,提出关联用户道路载荷的变速器耐久性试验方法。研究结果表明:在变速器耐久性试验中,通过该方法得到了城市公交车辆常用行驶挡位的可靠性试验循环加载次数,同时更准确地测试了城市公交车辆变速器的耐久性。Due to relatively fixed routes of public transportation, road load is with high repeatability. In order to evaluate transmission durability of bus accurately, a new test method based on user load spectrum was proposed. Firstly, road load spectrum of transmission output shaft while driving during certain period was collected. Loads of transmission output shaft has been decomposed on thetransmission input shaft and input shaft loading condition was frequency distribution of different load grades was obtained. figured out in various Secondly, based on gears. Meanwhile, equivalent damage theory, different levels of load were regarded as equivalent to the maximum damage and number of load cycles was worked out. Finally, according to design mileage and the mileage of road load spectrum, cycle index of loading which causes maximum damage was extrapolated. Therefore, method of testing durability of transmission associated customers of the road load spectrum was established. This study shows that transmission durability tests increased the city bus drive reliability test cycle times and accurately tested the durability of bus transmissions.

关 键 词：变速器 寿命试验 加速疲劳 道路载荷谱 

分 类 号：U467.3[机械工程—车辆工程]