汽车后副车架轻量化概念设计方法研究  

Research on Lightweight Conceptual Design Method of Vehicle Rear Subframe

作　　者：马芳武[1] 王卓君 杨猛[1] 梁鸿宇 武振江 蒲永锋[1] Ma Fangwu;Wang Zhuojun;Yang Meng;Liang Hongyu;Wu Zhenjiang;Pu Yongfeng(Jilin University,State Key Laboratory of Automotive Simulation and Control,Changchun 130022;CATARC(Tianjin)Automotive Engineering Research Institute Co.,Ltd.,Tianjin 300300)

机构地区：[1]吉林大学,汽车仿真与控制国家重点实验室,长春130022 [2]中汽研(天津)汽车工程研究院有限公司第三开发本部,天津300300

出　　处：《汽车工程》2021年第5期776-783,790,共9页Automotive Engineering

基　　金：吉林省省校共建计划专项项目(SXGJSF2017-2-1-5,SXGJQY2017-7);吉林省产业技术研究与开发专项项目(2019C041-2);国家重点研发计划项目(2016YFB0101601)资助。

摘　　要：在汽车结构概念设计阶段,将拓扑优化技术与隐式参数化建模相结合,并引入截面形状控制方法,用以实现产品结构-材料-性能一体化优化设计。第1步,对后副车架进行综合目标拓扑优化。第2步,建立隐式参数化模型,采用截面形状控制方法选择零件形状、位置、厚度和材料等36个参数为设计变量,以质量最小、第1阶模态频率最高为目标,硬点刚度和前3阶模态频率为约束,进行多目标优化。结果表明,在满足后副车架性能目标的条件下,质量减轻2.41 kg,其轻量化率达14.5%。In the conceptual design stage of automotive structure,an integrated structure⁃material⁃perfor⁃mance optimization is achieved by combining topology optimization technology and parametric modeling with the section shape control method introduced in this paper.Firstly,a comprehensive objective topology optimization is conducted on rear subframe.Secondly,an implicit parametric model of rear subframe is constructed,and by adopt⁃ing the cross⁃sectional shape control method,36 parameters such as part shape,position,thickness and material etc.are selected as design variables,a multi⁃objective optimization is carried out on the model topologically opti⁃mized,with minimizing mass and maximizing the first⁃order modal frequency as objectives and the hard⁃points stiff⁃ness and the first⁃three⁃order modal frequencies as constraints.The results show that on the premise of meeting the performance objective of rear subframe,its mass reduces by 2.41 kg,achieving a lightweighting rate of 14.5%.

关 键 词：概念设计 参数化建模 后副车架 轻量化设计 

分 类 号：U463.324[机械工程—车辆工程]