Optimization design for aerodynamic elements of high speed trains

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Optimization design for aerodynamic elements of high speed trains
	Yao SB(姚拴宝); Guo DL(郭迪龙); Sun ZX(孙振旭); Yang GW(杨国伟); Chen DW(陈大伟)
刊名	COMPUTERS & FLUIDS
	2014-05-22
通讯作者邮箱	sunzhenxu@imech.ac.cn
卷号	95 页码:56-73
关键词	Wake flow Multi-objective optimization Cross-validation Kriging High speed trains
ISSN号	0045-7930
通讯作者	Sun, ZX (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
产权排序	[Yao Shuanbao; Guo Dilong; Sun Zhenxu; Yang Guowei] Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China; [Chen Dawei] Qingdao Sifang Locomot Co Ltd, CSR, Qingdao 266111, Peoples R China
中文摘要	The complex wake flow of high speed trains severely influences the running safety and amenity of the trailing car. In this paper, based on the streamlined shape of CRH380A high speed train, taking the aerodynamic lift force of the trailing car and the volume of the streamlined head as the objectives, an efficient multi-objective optimization process based on the response surface has been constructed. The Kriging model has been constructed based on the cross-validation method and genetic algorithm (GA). This approach could decrease the number of training samples and improve the optimization efficiency while without decreasing its generalization. After the Pareto optimal solutions being obtained, four design points are chosen for comparative study with the original shape, and one of these points is chosen for the unsteady aerodynamic study together with the original shape. The results reveal that the variation trends of the lift force and the side force of the trailing car are the same as that of the drag of the whole train. After optimization, the volume of the streamlined head is almost the same as that of the original shape. Compared to the original shape, the lift force of the trailing car decreases by 27.86% of and the drag of the whole train decreases by 3.34% in conditions without crosswind, and the lift force of the trailing car decreases by 5.43%, the side force of the whole train decreases by 72.09% and the drag of the whole train decreases by 2.1% in the crosswind conditions. The optimal train benefits from low fluctuations of lift and side force of the trailing car. Besides, better wake flow could be obtained, and the wake vortices are suppressed, too. Consequently, the running safety and amenity of HST are improved a lot after optimization. (C) 2014 Elsevier Ltd. All rights reserved.
学科主题	Computer Science; Mechanics
分类号	二类/Q2
收录类别	SCI ; EI
资助信息	This work was supported by 973 program (2011CB711100) and national key technology R&D program (2009BAQG12A03). Computing Facility for Computational Mechanics Institute of Mechanics, Chinese Academy of Sciences is gratefully acknowledged.
原文出处	http://dx.doi.org/10.1016/j.compfluid.2014.02.018
语种	英语
WOS记录号	WOS:000335629800005
公开日期	2014-06-19
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/48864]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
推荐引用方式 GB/T 7714	Yao SB,Guo DL,Sun ZX,et al. Optimization design for aerodynamic elements of high speed trains[J]. COMPUTERS & FLUIDS,2014,95:56-73.
APA	姚拴宝,郭迪龙,孙振旭,杨国伟,&陈大伟.(2014).Optimization design for aerodynamic elements of high speed trains.COMPUTERS & FLUIDS,95,56-73.
MLA	姚拴宝,et al."Optimization design for aerodynamic elements of high speed trains".COMPUTERS & FLUIDS 95(2014):56-73.