车身后部结构气动性能自动优化及其工程应用  

Automatic Optimization of Aerodynamic Performance of Rear Structure of Vehicle Body and Its Engineering Application

作　　者：陆润明 廖抒华[1] 覃紫莹 韩广龙 LU Run-ming;LIAO Shu-hua;QIN Zi-ying;HAN Guang-long(College of Mechanical and Traffic Engineering,Guangxi University of Science and Technology,Liuzhou 545000,China;Shanghai Zhuangchi Technology Co.,Ltd,Shanghai 201313)

机构地区：[1]广西科技大学机械与交通工程学院,柳州545006 [2]上海庄驰科技有限公司,上海201313

出　　处：《科学技术与工程》2020年第1期354-360,共7页Science Technology and Engineering

基　　金：广西科学研究与技术开发重大专项计划(桂科重14122002-4)

摘　　要：车身后部结构特征对整车的空气动力学性能有重要的影响。为研究车身后部各结构变化对轿车尾部流场的影响规律及各设计变量之间的相关性,并在此基础上对车身后部结构参数进行优化,以提高轿车的空气动力学性能。通过运用网格自适应方法和集成仿真软件STAR CCM+进行试验设计;并建立近似模型探索以整车气动性能为目标的车身后部各结构参数的最佳组合。结果表明:与传统车身优化方法相比,运用网格自适应方法、试验设计方法和近似模型相结合进行车身优化,大幅度减少了车身优化的时间,且优化效果良好。优化车身后部结构参数,能明显改善尾部流场结构,提高整车的气动特性。The rear structural features of a car body have an important effect on the aerodynamic performance of the vehicle.To study the influence of various structural changes on the rear of the car in the flow field of the car and the correlation among the design parameters,the structural parameters of the rear part were optimized to improve the aerodynamic performance.An experimental design was carried out using a grid adaptive method and the integrated simulation software Star ccm+,and an approximate model to explore the optimal combination of structural parameters was established for the rear part with the aerodynamic performance of the vehicle.The results show that compared with the traditional vehicle-body optimization,the combination of grid adaptive method,experimental design method,and approximate model could optimize the vehicle body and greatly reduce the time of vehicle optimization for a good optimization effect.Optimizing the structural parameters of the rear part of a vehicle can significantly improve the structure of the tail flow field and improve the aerodynamic performance of the vehicle.

关 键 词：网格自适应 试验设计 近似模型 车身后部结构 尾部流场 

分 类 号：U461.1[机械工程—车辆工程]