| 横风下π型断面大跨桥上汽车气动特性风洞试验（双语出版） |
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| 引用本文： | 何旭辉,薛繁荣,邹云峰,蒋硕,杜镔,徐向东,马白虎.横风下π型断面大跨桥上汽车气动特性风洞试验（双语出版）[J].中国公路学报,2019,32(10):169. |
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| 作者姓名： | 何旭辉 薛繁荣 邹云峰 蒋硕 杜镔 徐向东 马白虎 |
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| 作者单位： | 1. 中南大学 土木工程学院, 湖南 长沙 410075;2. 贵州省交通规划勘察设计研究院股份有限公司, 贵州 贵阳 550081;3. 贵州省公路开发有限责任公司, 贵州 贵阳 550081 |
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| 基金项目： | 贵州省科技重大专项（黔科合重大专项字[2016]3013）；国家自然科学基金项目（51508580，U1534206，51508574，51708202，51822803）；国家重点研发计划项目（2017YFB1201204）；湖南省自然科学基金项目（2018JJ1027） |
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| 摘 要： | 准确获得车-桥系统气动力是评估强风作用下桥上车辆运行安全性和舒适性的基本前提，为此必须考虑车辆与桥梁间存在的显著气动相互干扰。以山区大跨桥梁常见的π型断面主梁和集装箱货车为研究对象，设计并制作了1：32几何缩尺比的桥梁和车辆刚性测压模型，通过风洞试验测试了典型车-桥组合工况下车辆表面的风压分布，分析了前、后车辆干扰作用、车辆横向距离和车道组合方式等对桥上汽车气动特性的影响，并进一步分析汽车表面的风压值分布，以探究汽车气动力系数变化的机理。研究结果表明：前、后车辆间的干扰、车辆横向距离的改变对汽车的侧向力系数、阻力系数和升力系数均有较大影响，但对汽车的力矩系数影响较小，且汽车的力矩系数具有一定的离散性；车道组合方式中测试车辆位置的改变对汽车气动特性的影响大于干扰车辆位置的改变对汽车气动特性的影响，且车辆组合方式的改变对汽车的力矩系数基本没有影响；受桥梁π型主梁断面的影响，汽车侧向力系数的变化趋势与Coleman规律下的变化趋势不同。
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| 关 键 词： | 桥梁工程 π型断面 风洞试验 车-桥系统 车辆 气动特性 |
| 收稿时间： | 2019-04-26 |
Wind Tunnel Test on Aerodynamic Characteristics of Large-span Bridge with Vehicles on π-Cross Section Under Cross Wind（in English） |
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| HE Xu-hui,XUE Fan-rong,ZOU Yun-feng,JIANG Shuo,DU Bin,XU Xiang-dong,MA Bai-hu.Wind Tunnel Test on Aerodynamic Characteristics of Large-span Bridge with Vehicles on π-Cross Section Under Cross Wind（in English）[J].China Journal of Highway and Transport,2019,32(10):169. |
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| Authors: | HE Xu-hui XUE Fan-rong ZOU Yun-feng JIANG Shuo DU Bin XU Xiang-dong MA Bai-hu |
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| Affiliation: | 1. School of Civil Engineering, Central South University, Changsha 410075, Hunan, China;2. Guizhou Transportation Planning Survey & Design Academe Co., Ltd., Guiyang 550081, Guizhou, China;3. Yingyun Highway Administration Bureau of Guizhou Province, Guiyang 550081, Guizhou, China |
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| Abstract: | Accurately obtaining the aerodynamic force of a vehicle-bridge system is the basic premise for assessing the safety of vehicle operation on bridges under strong winds. Therefore, it is necessary to consider the significant aerodynamic interference between vehicles and bridges. In this study, a large-span bridge with π-cross section and a container truck were taken as research objects. The rigid pressure measuring models of both the bridge and vehicles with a scale ratio of 1:32 were designed and produced. Then, using the developed test device, the distribution of wind pressure on the surfaces of vehicles under typical vehicle-bridge combination conditions was tested for a uniform flow field in the high-speed test section of the wind cave laboratory of Central South University. This paper analyzes the influence of front and rear vehicle interference, vehicle transverse distance, and lane combination on the aerodynamic characteristics of vehicles. From the results of the wind pressure distribution on the surfaces of vehicles, the reasons for the change of the aerodynamic coefficients of vehicles were investigated. The results show that although vehicle interference and lateral distance have a great influence on the lateral force coefficient, drag coefficient, and lift coefficient of vehicles, they have a small effect on the torque coefficient of vehicles; the torque coefficient of vehicles has a certain dispersion. In different lane combination modes, changes in the test vehicle positions have more influence on vehicle aerodynamic characteristics than the change of position of interfering vehicles. Additionally, the change of vehicle combination mode has no influence on vehicle torque coefficient. The variation trend of the lateral force coefficient of the vehicle is different from that of Coleman's law affected by the π-cross section. |
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| Keywords: | bridge engineering π-cross section wind tunnel test vehicle-bridge system vehicle aerodynamic characteristic |
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