摘要
针对装有五连杆后悬架的后副车架零部件级台架疲劳试验由于液压作动器相互干涉,难以布置而无法进行的问题,提出一种基于应力张量分析的疲劳试验方法。它根据危险点应力状态,识别出关键载荷通道,对于两个潜在风险点,分别定义了简单可实施的块谱载荷。设计的试验方案,危险点主应力方向基本不变,损伤与原始路谱接近,试验结论与后悬架系统试验一致,降低了试验成本和开发风险。
In view of that the component level fatigue bench test of rear sub-frame for five links rear suspension can't be conducted due to the interference between hydraulic actuators and hard to arrange,a fatigue test method based on stress tensor analysis is proposed.According to the stress state of potential dangerous points,the key load channels are identified,and the simple and implementable block spectra loads are defined respectively for two potential dangerous points.In the test scheme devised,the principal stress directions of dangerous points remain basically unchanged,their damage is close to that with original road spectra,and the conclusion of the test is consistent with that of suspension system test,with the cost of test and development risk reduced.
作者
程稳正
余小巧
肖厦
董远明
侯杰
Cheng Wenzheng;Yu Xiaoqiao;Xiao Xia;Dong Yuanming;Hou Jie(Geely Automobile Research Institute(NINGBO)Co.,Ltd.,Ningbo 315000)
出处
《汽车工程》
EI
CSCD
北大核心
2021年第10期1555-1564,共10页
Automotive Engineering
关键词
后副车架
应力张量
疲劳
块谱
台架试验
rear subframe
stress tensor
fatigue
block spectrum
bench test
