Multi-objective aerodynamic optimization design for head shape of high-speed trains

被引：0

作者：

Zhang L. ^{[1
]}

Zhang J. ^{[1
]}

Li T. ^{[1
]}

Zhang W. ^{[1
]}

机构：

[1] State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu

来源：

Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2016年 / 51卷 / 06期

关键词：

Correlation analysis; Genetic algorithms; High-speed trains; Multi-objective optimization; Parametric model;

D O I：

10.3969/j.issn.0258-2724.2016.06.003

中图分类号：

学科分类号：

摘要：

To improve the aerodynamic performance of high-speed trains running in open air, an optimization design method of the head shape of high-speed trains was proposed. Taking the aerodynamic drag force of the head car and the aerodynamic lift force of the tail car as the optimization objectives, the automatic multi-objective optimization design of the head shape of high-speed trains was carried out. Based on a new type high-speed train, the parametric model of the high-speed train including bogie zones was established. Seven design variables were extracted, which control the nose height, the top height of the opening and closing mechanism of lids, the cab window height, the lateral width of the maximum horizontal contour line, the concave-convex degree of the central auxiliary control line of the streamlined head, and the lateral width and partition angle of the bogie zone, respectively. The aerodynamic models of high-speed trains were then established based on the theory of computational fluid dynamics (CFD). With the models, the aerodynamic forces acting on the trains were calculated. The design variables were automatically updated through the multi-objective genetic algorithm to achieve the automatic optimization design of the head shape of high-speed trains. In addition, the correlations between the optimization objectives and the design variables were analyzed. The results show that the cab window height and the lateral width of the bogie zone have the most influences on the drag force of the head car, while the nose height and the concave-convex degree of the central auxiliary control line have the most influences on the lift force of the tail car. After optimization, 6 Pareto-optimal head shapes are obtained. For these 6 Pareto-optimal head shapes, when compared with the head shape before optimization, the drag force of the head car is reduced by up to 3.15%, and the lift force of the tail car is reduced by up to 17.05%. © 2016, Editorial Department of Journal of Southwest Jiaotong University. All right reserved.

引用

页码：1055 / 1063

页数：8

共 19 条

[1]

Schwanitz S., Wittkowski M., Rolny V., Et al., Pressure variations on a train: where is the threshold to railway passenger discomfort, Applied Ergonomics, 44, 2, pp. 200-209, (2013)

[2]

Muld T.W., Efraimsson G., Henningson D.S., Flow structures around a high-speed train extracted using proper orthogonal decomposition and dynamic mode decomposition, Computers & Fluids, 57, 4, pp. 87-97, (2012)

[3]

Zhou X., Xiao X., He B., Et al., Influential factors and rules for insertion loss of high-speed railway noise barriers, Journal of Southwest Jiaotong University, 49, 6, pp. 1024-1031, (2014)

[4]

Du J., Liang J., Tian A., Analysis of aeroacoustics characteristics for pantograph of high-speed trains, Journal of Southwest Jiaotong University, 50, 5, pp. 935-941, (2015)

[5]

Baker C., The flow around high speed trains, Journal of Wind Engineering and Industrial Aerodynamics, 98, 6-7, pp. 277-298, (2010)

[6]

Li T., Yu M.G., Zhang J.Y., Et al., A fast equilibrium state approach to determine interaction between stochastic crosswinds and high-speed trains, Journal of Wind Engineering and Industrial Aerodynamics, 143, 8, pp. 91-104, (2015)

[7]

Matsumura T., Nakatani K., Fukuda T., Et al., Effective nose shape for reducing tunnel sonic boom, Railway Technical Research Institute, Quarterly Reports, 38, 4, pp. 206-211, (1997)

[8]

Hemida H., Krajnovic S., LES study of the influence of the nose shape and yaw angles on flow structures around trains, Journal of Wind Engineering and Industrial Aerodynamics, 98, 1, pp. 34-46, (2010)

[9]

Chen N., Zhang J., Experimental investigation on aerodynamic drag of high speed train, Journal of the China Railway Society, 20, 5, pp. 40-46, (1998)

[10]

Miao X., Li M., Yao Y., Et al., Wind tunnel test investigation on the shape optimization of head car of the high speed train, Journal of Railway Science and Engineering, 9, 2, pp. 94-98, (2012)

← 1 2 →