Optimization design of step slope embankment in wind zone

被引：0

作者：

Niu J. ^{[1
]}

Liang X. ^{[1
]}

机构：

[1] School of Traffic and Transportation Engineering, Central South University, Changsha

来源：

| 2016年 / Huazhong University of Science and Technology卷 / 44期

关键词：

Aerodynamic performance; Embankment; High-speed train; Optimization design; Staged slope;

D O I：

10.13245/j.hust.160223

中图分类号：

学科分类号：

摘要：

The three-carriage high-speed train running on the 10 m height embankment at the speed of 300 km/h in wind zone of 20 m/s was simulated by three-dimensional steady uncompressible Reynolds-averaged N-S equation and κ-ε equation turbulence model. The structure side slope of embankment was changed and optimized. Numerical results are in agreement with experimental data and the error between them is less than 10%. The results indicate that, both embankment slopes designed into the steps is the best to improve train aerodynamic performance. The change rules of aerodynamic force and moment of train located on the different railway lines with the step height are the similar. The optimal height of each car is different, and there is obvious different among change rules of train aerodynamic force and moment with the step height. Range of 3~5 m is a best optimum step height to improve the train performance running on the embankment. The top of slopes designed into step can effectively improve the train aerodynamic performance. The bottom of the embankment slopes designed into a relatively large height step is an effective method to improve the train aerodynamic performance. © 2016, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.

引用

页码：112 / 117

页数：5

共 4 条

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[3] Suzuki M., Tanemoto K., Maeda T., Aerodynamic characteristics of train/vehicles under cross winds, Journal of Wind Engineering and Industrial Aerodynamics, 91, 1-2, pp. 209-218, (2003)
[4] Diedrichs B., Sima M., Orellano A., Et al., Crosswind stability of a high-speed train on a high embankment, Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 221, 2, pp. 205-225, (2007)

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