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基于虚拟迭代的某牵引车车架疲劳耐久性分析

Fatigue Durability Analysis of Tractor Frame Based on Virtual Iteration
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摘要 为高效评估用户里程内车辆疲劳耐久表现,以某6×4牵引车车架为研究对象,通过襄阳试验场强化道路采集车辆轮心六分力。在HyperMesh中建立包含主副油箱附件的车架有限元模型并校核其静强度,应用惯性释放理论获取其单位载荷下应力场分布结果。建立整车刚柔耦合多体动力学模型并开展K&C试验进行模型校核,基于试验场六分力数据,利用Adams/car与Femfat-Lab联合仿真虚拟迭代得到悬架系统与车架连接处载荷谱。结合车架单位载荷应力场结果、车架疲劳载荷谱及车架材料ε-N疲劳曲线,根据Miner线性累积损伤理论,采用nCode软件对车架进行疲劳仿真分析。结果表明:该牵引车车架结构可以满足用户周期里程内的疲劳寿命要求,与试验场实车耐久试验结果一致。 In order to evaluate the fatigue performance of vehicles within the mileage of users,a tractor frame was taken as the research object,and the six-component force were tested on the endurance road of Xiangyang.The finite element model of the frame was established in HyperMesh and its static strength was checked.The stress field distribution results under unit load were obtained by applying the inertia release theory.The rigid-flexible coupling multi-body dynamics model of the vehicle was established and the K&C test was carried out to check the model.Based on the results of stress field of unit load,fatigue load spectrum of frame andε-N fatigue curve of frame material,the fatigue simulation analysis of frame was carried out by nCode software according to Miner linear cumulative damage theory.The results show that the frame can meet the fatigue life requirement within the mileage of users,which is consistent with the test results.
作者 田佳伟 冯哲 叶明松 何水龙 TIAN Jia-wei;FENG Zhe;YE Ming-song;HE Shui-long(School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guangxi Guilin 541004,China;Dongfeng Liuzhou Motor Co.,Ltd.,Guangxi Liuzhou 544005,China)
出处 《机械设计与制造》 北大核心 2024年第10期133-138,144,共7页 Machinery Design & Manufacture
基金 广西创新驱动发展科技重大专项(AA18242033) 柳州市科技计划项目(2020GAAA0404)。
关键词 六分力 载荷谱 多体动力学 虚拟迭代 疲劳耐久性 Six Component Force Load Spectrum Multi-Body Dynamics Virtual Iteration Fatigue Durability
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