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.
出处
《汽车实用技术》
2015年第12期53-57,共5页
Automobile Applied Technology
关键词
汽车
悬架弹簧
随机应力
小波分析
雨流计数
Vehicle
Suspension spring
Random stress
Wavelet analysis
Rain-flow counting
