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Aerodynamic characteristics of a high-speed train crossing the wake of a bridge tower from moving model experiments

Railway Engineering Science 2022年第2期30卷 221-241页

作者： Jinfeng Wu Xiaozhen Li C.S.Cai Dejun Liu Department of bridge Engineering School of Civil EngineeringSouthwest Jiaotong UniversityChengduChina 610031 Department of bridge Engineering School of TransportationSoutheast UniversityNanjingJiangsuChina Department of Civil and Environmental Engineering Louisiana State UniversityBaton RougeLA 70803USA College of Civil Engineering and Architecture Jiaxing UniversityJiaxing 314001ZhejiangChina

In a strong crosswind,the wake of a bridge tower will lead to an abrupt change of the aerodynamic forces acting on a vehicle passing through it,which may result in problems related to the transportation *** study investigates the transient aerodynamic characteristics of a high-speed train moving in a truss girder bridge and passing by a bridge tower in a wind *** scaled ratio of the train,bridge,and tower are 1:*** of various parameters such as the incoming wind speed,train speed,and yaw angle on the aerodynamic performance of the train were *** the sudden change mechanism of aerodynamic loads on the train when it crosses over the tower was further *** results show that the bridge tower has an apparent shielding effect on the train passing through it,with the influencing width being larger than the width of the *** train speed is the main factor affecting the influencing width of aerodynamic coefficients,and the mutation amplitude is mainly related to the yaw angle obtained by changing the incoming wind speed or train *** vehicle movement introduces an asymmetry of loading on the train in the process of approaching and leaving the wake of the bridge tower,which should not be neglected.

关键词： Vehicle aerodynamics Wind tunnel test Moving train bridge tower Shielding effect Sudden change mechanism truss bridge

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