重型载货汽车柔性车架的轻量化研究  

Lightweight Research on Flexible Frame of Heavy Truck

作　　者：李韶华[1,2] 张兵 冯桂珍[1] LI Shao-hua;ZHANG Bing;FENG Gui-zhen(School of Mechanical Engineering,Shijiazhuang Tiedao University,Hebei Shijiazhuang 050043,China;Traffic Safety and Control Key Laboratory of Hebei Province,Hebei Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学械工程学院,河北石家庄050043 [2]河北省交通安全与控制重点实验室,河北石家庄050043

出　　处：《机械设计与制造》2020年第10期110-114,共5页Machinery Design & Manufacture

基　　金：国家自然科学基金:项目(11472180,11572207)。

摘　　要：针对某重型载货汽车车架轻量化问题,通过solidworks对车架进行参数化建模,利用有限元对车架进行分析,在ADAMS/car中建立了考虑柔性车架的刚柔耦合重型汽车整车模型。将车架各主梁的壁厚作为设计变量。通过尺寸优化方法在保证车架可靠性的基础上进行轻量化研究,减轻车架质量。对优化后的车架进行满载弯曲、满载扭转以及满载弯扭三种典型工况的分析,并对车架进行模态计算以及疲劳寿命预测,将优化前后的结果进行对比。结果表明:车架在进行优化之后,质量降低了7.3%,并且其强度、固有频率、疲劳寿命均可满足使用要求,达到了车架轻量化的目的。For a heavy truck frame lightweight,SolidWorks based parametric modeling of the frame,Analysis of frame by finite element method,and a rigid flexible coupling heavy vehicle model considering the flexible frame is established in ADAMS/car.The frame of the bridge wall thickness as the design variables,the size optimization method in order to ensure the lightweight research on basic frame reliability,reduce frame quality.The optimized frame was analyzed in three typical conditions of full load bending,full load torsion and full load bending and torsion,and the modal calculation and fatigue life prediction of the frame were carried out.The results were compared before and after the optimization.The results show that after the frame is optimized,the quality is reduced by 7.3%,and its strength,natural frequency and fatigue life can meet the requirements of use,and the purpose of lightweight frame is achieved.

关 键 词：车架 刚柔耦合整车模型 轻量化 静力学分析 模态分析 疲劳寿命 

分 类 号：TH16[机械工程—机械制造及自动化]