基于多目标的车身结构静动态参数协同优化

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英文篇名：Static and dynamic parameters optimization for car body based on multi-objective topology optimization 作者：杨斌 ; 陈剑 ; 杜选福 ; 汤杰 英文作者：YANG Bin;CHEN Jian;DU Xuanfu;TANG Jie;School of Mechanical Engineering, Hefei University of Technology; 关键词：车身 ; 多目标 ; 变密度法 ; 刚度 ; 模态频率 英文关键词：car body;;multi-objective;;variable density method;;stiffness;;modal frequency 中文刊名：HEFE 英文刊名：Journal of Hefei University of Technology(Natural Science) 机构：合肥工业大学机械工程学院; 出版日期：2019-03-28 出版单位：合肥工业大学学报(自然科学版) 年：2019 期：v.42;No.311 基金：合肥工业大学产学研校企合作资助项目(W2015JSKF0392) 语种：中文; 页：HEFE201903014 页数：6 CN：03 ISSN：34-1083/N 分类号：105-109+150

摘要

文章建立了某小型休闲车(small recreation vehicle,SRV)车身结构有限元模型,通过数值计算与试验模态的对比分析验证了模型的准确性;对白车身的弯曲、扭转刚度进行分析同时关注车身的低阶模态频率,提出了一种以静态多工况结构刚度和振动频率为目标函数、基于实体各向同性材料惩罚函数的拓扑优化方法;用折衷规划法定义多目标拓扑优化和多刚度拓扑优化的目标函数,以平均频率法确定振动频率目标函数,得到了同时满足静态刚度和低阶振动频率要求的白车身的结构拓扑。该文方法实现了静态刚度和低阶振动频率的协同优化,优化结果显示车身刚度和低阶频率值均有所提高,结构更趋于合理。
        A structural FEA model of a small recreation vehicle(SRV) was built and the model was verified by the comparative analysis of the modal test and numerical calculation. In order to optimize the static stiffness and improve the low-order modal frequency of the body, a multi-objective topology optimization scheme for body in white(BIW) was proposed with static stiffness for multi-conditions and multi-low-order frequencies as objective functions. Based on the solid isotropic material with penalization for intermediate densities(SIMP) method, compromise programming method was adopted to define objectives of multi-objective topology optimization and multi-stiffness topology optimization, and the mean frequency method was adopted to settle eigenfrequencies of free vibration optimization. The result shows that the coordinated optimization of static stiffness and low-order vibration frequency is achieved, the body structure stiffness and low-order frequencies increase and the structure is more reasonable.

引文

[1] 桂良进,范子杰,周长路.“长安之星”微型客车白车身刚度研究[J].机械工程学报,2004,40(9):195-198.
    [2] 蒋丰鑫,张要思,陈剑.基于灵敏度分析的轿车车身质量优化研究[J].汽车科技,2014(1):26-31.
    [3] 高云凯,杨欣,金哲峰.车身刚度优化方法研究[J].同济大学学报(自然科学版),2005,33(8):1095-1097.
    [4] 陈剑,杜选福,施斐博.基于加权相对灵敏度的白车身结构轻量化[J].中国机械工程,2016,27(24):3402-3407.
    [5] ANDERSON M.Structural optimization of product families with application to vehicle body structures[D].Linkping:Linkping University,2006.
    [6] 范文杰,范子杰,苏瑞意.汽车车架结构多目标拓扑优化方法研究[J].中国机械工程,2008,19(12):1505-1508.
    [7] 施斐博.某SRV车内噪声振动优化分析[D].合肥:合肥工业大学,2016.
    [8] MA Z D,KIKUCHI N,CHENG H C.Topological design for vibrating structures[J].Computer Methods in Applied Mechanics and Engineering,1995,121:259-280.