随机路面激励下汽车悬架弹簧应力分析  

The Stress Analysis of Suspension Spring under Automobile Random Road Motivation

作　　者：陈双[1] 梁金刚 

机构地区：[1]辽宁工业大学汽车与交通工程学院,辽宁锦州121001 [2]辽沈工业集团驻七二四厂,辽宁沈阳110045

出　　处：《汽车实用技术》2015年第12期53-57,共5页Automobile Applied Technology

摘　　要：基于整车八自由度动力学模型和路面四轮相关随机输入时域模型,得到了悬架弹簧随机应力的时间历程,在此基础上采用离散二进小波变换,对弹簧随机应力时间历程进行多层小波分解及重构,并对分解后的应力历程应用改进的四峰-谷值雨流计数法进行统计分析,得到应力频次的分布情况。研究结果为汽车悬架零件的疲劳损伤分析提供新的参考。On the basis of eight degrees of freedom vehicle dynamic model and road surface time-domain model of random input with four-wheel-related, the random stress time course of suspension springs is derived. It is decomposed and reconstructed for many layers through discrete dyadic wavelet transform. And rain-flow counting method is used to analyze the stress process after decomposition. The distribution of the stress frequency is obtained. The research conclusion will offer new conference to fatigue damage analysis of automobile suspension spring.

关 键 词：汽车 悬架弹簧 随机应力 小波分析 雨流计数 

分 类 号：U463.3[机械工程—车辆工程]