摘要
为提高高速列车运行过程中的气动性能,降低运行成本,针对受电弓舱气动结构外形,利用计算流体力学原理对矩形、椭圆形、胶囊形和六边形4种内置式受电弓舱结构进行数值模拟计算,计算得到矩形内置式受电弓舱结构能够最大程度改善受电弓气动阻力与气动升力性能。在此基础上,以矩形内置式受电弓舱主要结构参数为优化设计变量,受电弓气动阻力和气动升力为优化目标,选取最优拉丁超立方设计的试验设计方法建立响应面近似模型,采用第二代非劣排序的遗传算法(Non-dominated sorting genetic algorithm-Ⅱ,NSGA-Ⅱ),对矩形内置式受电弓舱气动结构外形进行多目标优化设计。结果表明:完成320次优化迭代计算后得到一系列Pareto优化结果,优化后的模型可使受电弓气动阻力最多降低5.9%,受电弓气动升力最多降低2.5%,与原始模型相比,受电弓舱倾角增大,其余设计变量变化不大;高速列车运行时,受电弓舱倾角越大越有利于改善受电弓部位气动阻力和升力性能。
In order to improve the aerodynamic performance in the process of the train operation and reduce operating cost,the principle of computational fluid dynamics is used to carry out numerical simulation calculation of four kinds of built-in pantograph cabin structures,namely rectangular,elliptical,capsule and hexagon with refrence to the aerodynamic structure profile of pantograph cabin.The results show that the rectangular built-in pantograph cabin structure can maximize the aerodynamic performance of drag and lift of pantograph.On this basis,the main structural parameters of the rectangular built-in pantograph cabin are taken as the optimization variables,and the aerodynamic drag and aerodynamic lift of the pantograph are taken as the optimization objectives.Then the experimental design method of Optimal Latin Hypercube design is selected to establish the approximate response surface model and non-dominated sorting genetic algorithm-Ⅱis used to carry out the multi-objective optimization design of rectangular built-in pantograph cabin structure.After 320 optimization iterative compuations,a series of Pareto optimization results are obtained.The results show that the optimized model can reduce the pantograph aerodynamic drag up to 5.9%and reduce the pantograph aerodynamic lift up to 2.4%.Compared with original model,as the inclination angle of pantograph cabin increases,the remaining design variables change a little.It indicates that during the high-speed train operation,the larger the inclination angle of pantograph cabin is,the more beneficial it is to improve the aerodynamic drag and lift performance of pantograph position.
作者
朱陇辉
武振锋
周琪
霍艳忠
ZHU Longhui;WU Zhenfeng;ZHOU Qi;HUO Yanzhong(School of Mechanical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Jining Locomotive Depot of China Railway Hohhot Bureau Group Co.,Ltd.,Ulanqab 012000,China)
出处
《铁道标准设计》
北大核心
2024年第3期214-221,共8页
Railway Standard Design
基金
甘肃省科技计划(重点研发计划)项目(20YF3GA014)。
关键词
高速列车
受电弓舱
数值模拟
多目标优化
NSGA-Ⅱ
high-speed train
pantograph cabin
numerical simulation
multi-objective optimization
NSGA-Ⅱ
作者简介
朱陇辉(1998-),男,硕士研究生,主要从事高速列车气动外形多目标优化研究工作,E-mail:3172477962@qq.com;通信作者:武振锋(1976—)男,教授,工学博士,主要从事高速列车空气动力学研究工作,E-mail:372753666@qq.com。
