变截面钢板弹簧台架疲劳载荷谱编辑研究  

Study on Fatigue Bench Load Spectrum of Leaf Spring with Variable Section

作　　者：杜建 于人杰[1,2] 董国疆 韩用[3] DU Jian;YU Renjie;DONG Guojiang;HAN Yong(China Automotive Engineering Research Institute Co.,Ltd.,Chongqing 401122,China;Chongqing Automotive Chassis Research Engineering Center,Chongqing 401122,China;Hebei Key Laboratory of Special Delivery Equipment,Yanshan University,Qinhuangdao 066004,Hebei,China)

机构地区：[1]中国汽车工程研究院股份有限公司,重庆401122 [2]重庆市汽车底盘性能工程技术研究中心,重庆401122 [3]河北省特种运载装备重点实验室(燕山大学),河北秦皇岛066004

出　　处：《机械科学与技术》2022年第3期371-378,共8页Mechanical Science and Technology for Aerospace Engineering

基　　金：汽车底盘性能工程技术研发团队项目(cstc2018kjrcsftd089)。

摘　　要：钢板弹簧台架疲劳载荷谱一般来源于经验估算值,不能准确反映钢板弹簧真实工况承载状态。本文提出一种新的钢板弹簧台架疲劳载荷谱编辑方法,从整车实际工况出发,综合应用道路载荷谱采集、多体动力学建模和载荷谱编辑技术,基于钢板弹簧试验场原始随机载荷谱编辑出台架疲劳载荷谱。采用仿真分析与试验验证两种技术手段,对比分析钢板弹簧试验场原始随机载荷谱与台架疲劳载荷谱对构件的影响规律,结果表明,两种谱下的钢板弹簧失效方式一致,台架谱较原始谱更为保守,证明可以通过载荷编辑技术实现钢板弹簧疲劳性能分析从昂贵的试验场验证转换到简单高效的室内台架验证。The leaf spring bench fatigue load spectrum has always been derived from the empirical estimates. It does not reflect the true stress state of the leaf spring. A new method for editing the leaf spring bench fatigue load spectrum is proposed. Starting from the actual working conditions of the vehicle, road load spectrum acquisition, multi-body dynamics modeling, and load spectrum editing techniques were comprehensively applied. The bench load spectrum was edited based on the original random load spectrum of test field. The simulation analysis and experimental verification were used to compare the effects of the original random load spectrum and bench load spectrum on the component. The results show that the leaf spring failure modes under the two spectrum are the same, and the bench spectrum is more conservative than the original spectrum. It proves that the fatigue analysis of leaf spring can be transformed from the expensive test field verification to simple and efficient indoor bench verification by using the load editing technology.

关 键 词：钢板弹簧 台架载荷谱 多体动力学 疲劳损伤 

分 类 号：U461[机械工程—车辆工程]