摘要
建立有效防风设施是保障桥上高速列车横风安全性的重要措施,为探索一种新型桥上曲线式挡风墙的防风效果,本文采用基于Realizable k-ε方程湍流模型的数值模拟方法,研究了具有不同高度(H)和不同弯曲程度(α)的曲线式挡风墙对高速列车横风气动特性的影响规律,结果表明:当设置α≈1/3、 H=2 m的矮挡风墙,或设置弯曲程度0<α<2/3、 H=5.5 m的高挡风墙时,列车受到的倾覆力矩最小,横风稳定性最佳,并得到了具有最佳防风效果的曲线式挡风墙H-α匹配曲线,为高架桥上防风设施的设计提供了理论依据.
The establishment of anti-wind facilities is an effective way to improve the operation safety of trains under crosswind conditions. In order to explore the wind protection effect of a new curved wind barrier on bridges, a numerical method based on Realizable k-ε turbulence model was adopted to study the effect of curved wind barriers with different heights(H) and bending degrees(α) on the aerodynamic performance of trains. Results show that when a short wind barrier with α≈1/3, H=2 m,or a high wind barrier with 0<α<2/3, H=5.5 m is set up, the overturning moment of the train is the smallest, and the cross wind stability is at the best;the H-α matching curve of the curved wind barrier with the best wind protection effect is also obtained, providing significant guidance for the design of the wind protection facilities on bridges.
作者
黄莎
李志伟
车正鑫
黄殿浪
易小霞
HUANG Sha;LI Zhi-wei;CHE Zheng-xin;HUANG Dian-lang;YI Xiao-xia(School of Railway Tracks and Transportation,Wuyi University,Jiangmen 529020,China)
出处
《五邑大学学报（自然科学版）》
CAS
2020年第1期10-17,32,共9页
Journal of Wuyi University(Natural Science Edition)
基金
广东省创新强校工程青年创新人才类项目(2017KQNCX205)
五邑大学高层次人才科研启动项目(2017RC37,2017RC36)
江门市基础与理论科研研究类科技计划项目(2018JC01009)
中南大学轨道交通安全教育部重点实验室开放课题项目(201709)。
关键词
高速列车
曲线式挡风墙
横风气动特性
倾覆力矩
High-speed trains
Curved wind barriers
Aerodynamic performance under crosswind
Overturning moment
