Wind Tunnel Test on Aerodynamic Characteristics of Moving Train-bridge System

被引：0
|
作者：
Zou S. [1 ,2 ]
He X. [1 ,2 ]
Zou Y. [1 ,2 ]
Shi K. [1 ,2 ]
Ou J. [1 ,2 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] National Engineering Laboratory for High-speed Railway Construction, Changsha
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2021年 / 43卷 / 12期
关键词：
Aerodynamic characteristic; Crosswind; High-speed railway bridge; Moving train; Train-bridge system; Wind tunnel test;
D O I：
10.3969/j.issn.1001-8360.2021.12.004
中图分类号：
学科分类号：
摘要：
To study the impact of the train-bridge system on the aerodynamic characteristics of various subsystems due to the difference of the train movement status under the cross wind, in this paper, the independently developed moving train-bridge wind tunnel test system and method were used to test the aerodynamic characteristics of train-bridge system under cross wind. In the case of the most widely used typical 32 m simply supported beam bridge of high-speed railway and CRH2 train, a test model with a scale ratio of 1:25 was designed to carry out aerodynamic characteristic tests on the static train and moving train on the bridge at different wind speeds and different positions. The results show that a large discrepancy exists between the aerodynamic characteristics of the train and the bridge obtained by the static train-bridge system model wind tunnel test and moving train-bridge system model wind tunnel test. The moving train increases the aerodynamic interference between the train and the bridge, causing more complicated aerodynamic characteristics. Although the resultant wind speed method of train speed and wind speed still seems to reflect the general trend of train aerodynamics, it is hardly tenable in the train-bridge system due to the interference of the bridge. Furthermore, the static train-bridge system wind tunnel tests show more stable testing properties, but they can neither fully demonstrate the aerodynamic characteristics of the bridge during train operation, nor the sensitivity of wind and moving train to the aerodynamic characteristics of the bridge. © 2021, Department of Journal of the China Railway Society. All right reserved.
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页码：30 / 37
页数：7
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