疲劳耐久性评价技术研究综述  

A Review of Research on Fatigue Durability Evaluation Technologies

作　　者：韩萌 王悦廉 李禄源 边增远 庄晔[2] Han Meng;Wang Yuelian;Li Luyuan;Bian Zengyuan;Zhuang Ye(Jilin Province Product Quality Supervision Test Institute,Changchun 130000;National Key Laboratory of Automotive Chassis Integration and Bionics,Jilin University,Changchun 130022)

机构地区：[1]吉林省产品质量监督检验院,长春130000 [2]吉林大学汽车底盘集成与仿生全国重点实验室,长春130022

出　　处：《汽车文摘》2024年第10期23-32,共10页Automotive Digest

基　　金：国家市场监督管理总局科技计划项目,新能源汽车悬架系统可靠性测试及评价方法研究(2022MK022)。

摘　　要：疲劳载荷谱处理是疲劳耐久分析的关键环节。在载荷谱的获取方面,综述并分析了虚拟路面法和载荷迭代法的优势和劣势。在载荷谱的处理方面,综述了增大幅值法、峰谷抽取法、增加频率法、时域关联编辑法等7种载荷谱处理方法,分析结果表明基于时域、频域或者将两者结合对载荷谱特征及信息进行提取,基于疲劳寿命损伤理论对载荷谱进行简化,能进一步加快疲劳分析的流程、缩短研究时长。在疲劳分析方法方面,分析了不同疲劳分析方法的优势和劣势,结果表明在疲劳分析过程的不同阶段选择合适的疲劳分析方法可以获得精度更高的疲劳预测结果,能更高效地获得车辆目标零部件的疲劳寿命。在疲劳耐久台架试验验证方面,针对台架试验的迭代过程存在迭代收敛较慢的问题,提出未来可以尝试通过神经网络的方式来对传递函数进行学习,以期获得更好的迭代效果,获得更为准确的驱动信号,提高疲劳分析的效率。Fatigue load spectrum processing is a key part of fatigue durability analysis.In terms of the acquisition of load spectrum,the advantages and disadvantages of the virtual pavement method and the load iterative method are reviewed and analyzed.In terms of load spectrum processing,7 load spectrum processing methods,including the increased magnitude method,the peak-to-valley extraction method,the increased frequency method,and the time-domain correlation editing method,are reviewed.The analysis results show that the load spectrum features and information are extracted based on the time domain,frequency domain or a combination of the two,and the load spectrum is simplified based on the fatigue life damage theory,which can further speed up the fatigue analysis process and shorten the research time.In terms of fatigue analysis methods,the advantages and disadvantages of different fatigue analysis methods are analyzed,and the results show that the fatigue prediction results with higher accuracy can be obtained by selecting appropriate fatigue analysis methods at different stages of the fatigue analysis process,and the fatigue life of vehicle target parts can be obtained more efficiently.In terms of fatigue durability bench test verification,in view of the problem of slow iterative convergence in the iterative process of bench test,it is proposed that the transfer function can be learned by neural network in the future,in order to obtain better iterative effect,more accurate driving signal,and improve the efficiency of fatigue analysis.

关 键 词：耐久性评价技术 道路模拟试验 载荷谱编制 

分 类 号：U462.36[机械工程—车辆工程] U467.5[交通运输工程—载运工具运用工程]