摘要
将气动阻力和气动升力作为优化目标,对高速列车头尾几何外形进行多目标优化设计.选取列车头尾横向、纵向、垂向三个方向共8组节点位置作为设计变量,利用网格变形技术得到需要进行仿真的样本.采用Fluent软件对3节编组高速列车在明线上运行的周围流场进行仿真计算,并得到其气动阻力和气动升力特性.通过响应面方法构造这两种气动特性对设计变量的响应关系,对其进行多目标优化设计得到优化后的列车外形,其气动阻力降低13.66%,且气动升力有效减小至1.46 N.
Taking aerodynamic resistance and aerodynamic lift as optimization objectives, the geometric shape of high-speed train head and tail is optimized with multiple objectives. Eight groups of optimized design variables were selected in vertical, length wise and horizontal directions of the train, and the samples needed to be simulated were obtained by using the mesh deformation technique. Fluent software was used to simulate the flow field of the three high-speed marshalling trains running on the open line, and the aerodynamic resistance and lift characteristics were obtained. Response surface method is used to construct the response relationship between the two aerodynamic characteristics and the design variables, and the multi-objective optimization design is carried out to obtain the optimized train shape. The aerodynamic resistance value is reduced, and the aerodynamic lift value is effectively reduced to 1.46 N.
作者
初彦彬
邱广宇
陈秉智
CHU Yanbin;QIU Guangyu;CHEN Bingzhi(School of Locomotive and Rolling Stock Engineering,Dalian Jiaotong University,Dalian 116028,China;CRRC Qiqihar Rolling Stock Co.,Ltd,Qiqihar 161000,China)
出处
《大连交通大学学报》
CAS
2021年第6期31-36,共6页
Journal of Dalian Jiaotong University
基金
国家重点研发计划资助项目(2016YFB1200504)
辽宁省自然科学基金资助项目(20180550527)
辽宁省教育厅基本科研资助项目(JDL2017024)
大连市科技创新基金资助项目(2019J11CY017)。
关键词
气动特性
多目标优化
网格变形法
响应面模型
aerodynamic characteristics
multi-objective optimization
mesh deformation method
response surface model
