某乘用车副车架程序载荷谱编制  

Identifying the program load spectrum of a passenger vehicle’s sub-frame

作　　者：柳泽田 尹辉俊[1] LIU Ze-tian;YIN Hui-jun(School of Machinery and Communications,Guangxi University of Science and Technology,Liuzhou 545006)

机构地区：[1]广西科技大学机械与交通学院,广西柳州545006

出　　处：《机械设计》2020年第9期61-66,共6页Journal of Machine Design

基　　金：广西高等学校优秀人才资助计划项目(桂教人〔2011〕40号);广西自然科学基金资助项目(2013GXNSFAA019319);广西科技计划资助项目(桂科攻1348005-12);广西重点实验室建设资助项目(桂财教〔2013〕51号13-A-01-06);广西研究生教育创新计划资助项目(YCSW2017202);广西科技大学硕士研究生创新项目(GKYC201902)。

摘　　要：实测随机载荷谱直接应用于副车架台架等效试验对设备精度要求严苛且所需试验周期长。现通过台架对标试验获取载荷-应力函数转化关系,将随机载荷谱转化为等效应力谱,在GlyphWorks软件中应力谱经雨流法计数统计后依据参数法进行频次外推,在此基础上将获取的应力谱损伤分析结果与疲劳损伤等效原理结合,建立8级程序载荷谱,为副车架疲劳台架试验提供数据支持,有效提高了工作效率和计算精度。The measured and random load spectrum is directly applied to the sub-frame’s equivalent tests,which requires rigorous accuracy and long period.In this article,the load-stress function transformation relationship is worked out by the bench test,and the random load spectrum is transformed into the equivalent stress spectrum.In the GlyphWorks software,the stress spectrum is subject to statistics by means of the rain-flow method,and the parameter-based frequency extrapolation is carried out.Besides,the eight-order program load spectrum is worked out with the aid of the damage analysis on the stress spectrum on one hand and the equivalent principle of fatigue damage on the other hand,which provides data support for the sub-frame’s fatigue bench tests and ensuring a high standard of efficiency in working and calculation accuracy.

关 键 词：对标试验 载荷谱 应力谱 雨流法 参数法外推 疲劳损伤 程序载荷谱 

分 类 号：U463[机械工程—车辆工程]