机械科学与技术2025，Vol.44Issue(8)：1359-1370,12.DOI:10.13433/j.cnki.1003-8728.20230249
全浮式空气弹簧驾驶室焊接疲劳特性研究
Study on Welding Fatigue Characteristics of Fully Floating Air Spring Cab
摘要
Abstract
In order to explore the accuracy difference between the equivalent structural stress method and the nominal stress method on the welding fatigue characteristics of the cab,a heavy-duty truck's fully floating air spring cab was taken as the research object,and road load spectrum data of the test site was collected,a rigid-flexible coupling virtual platform model was built and verified.The dynamic fatigue simulation load spectrum data of the cab interface point is solved with the virtual iteration method.The equivalent structural stress method and nominal stress method are used to simulate and analyze the fatigue of seam weld and spot weld of the cab.The results show that the equivalent structural stress method is more conservative than the nominal stress method,and the accuracy of the equivalent structural stress method is higher.The maximum relative error with the bench test result is 33.5%.The equivalent structural stress method is insensitive to the grid.The equivalent structural stress method has the characteristics of identifying the stress concentration effect at the welding position.Finally,the structure and welding process of the dangerous parts of the cab are improved.The fatigue life of cab seam weld and spot weld are increased by 6 times and 3.2 times The effectiveness of the improved scheme was verified by bench test.关键词
载荷谱采集/多体动力学/虚拟迭代/等效结构应力法/焊缝/焊点Key words
load spectrum collection/multi-body dynamics/virtual iteration method/equivalent structural stress/seam weld/spot weld分类
交通工程引用本文复制引用
杜建,董国疆,韩杰,刘志雷..全浮式空气弹簧驾驶室焊接疲劳特性研究[J].机械科学与技术,2025,44(8):1359-1370,12.基金项目
国家自然科学基金面上项目(51775481)与河北省教育厅科学研究项目(ZC2025146) （51775481）
