摘要
开展了车轮疲劳寿命仿真的网格无关性研究。针对疲劳评估试验周期长、成本高,且有限元仿真精度受网格尺寸影响较大等问题,基于名义应力法和局部应力-应变法进行了疲劳寿命预测,基于网格收敛指数(GCI)理论对疲劳寿命仿真结果进行了网格无关性验证,从而提出疲劳寿命仿真的最佳网格匹配。通过对比精确解的推导值,发现高质量网格、低误差范围的疲劳寿命模拟方法,从而为疲劳寿命预测的网格无关性理论构建奠定基础。以铝合金车轮为研究对象,根据GCI理论按照不同的网格尺寸对车轮进行了网格划分,开展了车轮的径向、弯曲静力仿真和疲劳寿命预测仿真,分析了不同网格尺寸下的仿真结果,提出了采用四面体离散化的铝合金乘用车轮毂网格尺寸合理性的判据,并进行了相应的验证分析,结果表明,GCI可以有效指导车轮疲劳寿命仿真的网格无关性分析与验证,提出的判据可以有效判断采用四面体离散化的铝合金乘用车轮毂网格尺寸的合理性。
This paper investigates the mesh independence of wheel fatigue life simulations.To address issues such as long fatigue assessment cycles,high testing costs,and the strong influence of mesh size on the finite element simulation accuracy,fatigue life predictions were carried out using both the nominal stress method and the local stress-strain method.The mesh independence of the simulation results was verified based on the grid convergence index(GCI)theory,leading to the recommendation of an optimal mesh configuration for fatigue life simulation.A fatigue life simulation method is proposed with high-quality meshing and low error range,which provides a theoretical foundation for establishing mesh independence in fatigue life prediction.Taking an aluminum alloy wheel as the research object,the wheel was meshed with different grid sizes according to the GCI theory.Radial and bending static simulations of the wheel,as well as fatigue life prediction simulations,were then conducted.The simulation results under different grid sizes were analyzed and a criterion was proposed to assess the rationality of tetrahedral meshing for aluminum alloy passenger car wheel hubs.Corresponding verification analysis was conducted.The results show that the GCI can effectively supports the mesh independence analysis and validation in wheel fatigue life simulations.The results in this paper provide a reliable basis for evaluating the suitability of tetrahedral mesh sizes in such applications.
作者
王诗豪
李钟尧
吴雪龙
苗以升
侯清怀
郎玉玲
孔德才
马小英
乔海波
王俊升
WANG Shihao;LI Zhongyao;WU Xuelong;MIAO Yisheng;HOU Qinghuai;LANG Yuling;KONG Decai;MA Xiaoying;QIAO Haibo;WANG Junsheng(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;School of Materials Science,Beijing Institute of Technology,Beijing 100081,China;CITIC Dicastal Co.,Ltd.,Qinhuangdao 066010,Hebei,China;Advanced Research Institute of Multidisciplinary Science,Beijing Institute of Technology,Beijing 100081,China)
出处
《汽车工程学报》
2025年第3期395-408,共14页
Chinese Journal of Automotive Engineering
基金
国家自然科学基金项目(52073030)。
