摘要
由于采用试验场道路试验验证单一零部件周期长、成本高,文章搭建了后桥试验台架,通过在汽车后桥粘贴传感器测试其应力变化,并以采集到后桥的室内外载荷谱数据为基础,利用雨流计数法将时域信号转化成雨流矩阵,利用等损伤原理进行损伤计算,建立了台架等幅疲劳试验、试验场试验里程和用户使用里程的当量关系。表明加载力为15kN,加载次数为13879次时可以保证后桥符合用户的使用目标,并且大大降低了试验成本,同时也为建立其它零部件的台架和试验场标准的研究提供了基础。
The rig test of rear axle is introduced in this paper because inspecting a single part in a road test needs long time anti has higher cost. Based on stress changes obtained from the sensor on the rear axle, and the load spectrum of rear axle acquired from rig test and road test, by using rain flow counting method, the time domain signal is changed into the rain flow matrix. Meanwhile damage life is ealeulated based on damage principle, building the equivalent correlation among rig faligue test, tesling mileage in test site and driving mileage for the customers. The resuhs show that luading 15 kN, loading times achieving 13 879 meet the requirements from the customers, the testing cost is significantly reduced, and il also provides the hasis fur establishing the other eomponent＇s test rig and testing site criterion.
出处
《汽车工程师》
2013年第6期49-51,共3页
Automotive Engineer
关键词
后桥
载荷谱
台架试验
当量关系
Rear axle
Load spectrum
Rig test
Equivalent correlation
