公铁并行梁间气动干扰效应随风攻角及行车位置的影响研究  

Aerodynamic interference effects between parallel highway and railway bridges under the influence of wind attack angle and train position

作　　者：金彦 张天睿 徐智伟 JIN Yan;ZHANG Tianrui;XU Zhiwei(College of Transportation Engineering,Nanjing Tech University,Nanjing 211816,China;College of Civil Aviation,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]南京工业大学交通运输工程学院,江苏南京211816 [2]南京航空航天大学民航学院,江苏南京211106

出　　处：《交通科学与工程》2025年第2期70-78,共9页Journal of Transport Science and Engineering

基　　金：江苏省高等学校自然科学研究面上项目(24KJB580007)。

摘　　要：【目的目的】探讨公铁并行桥梁的气动干扰问题。【方法方法】以泉州湾跨海大桥为研究对象,建立主梁节段1∶60缩尺计算流体动力学数值模型。通过引入气动力系数干扰因子,系统研究风攻角(-5°至5°)、桥梁相对迎风位置及列车行车位置对铁路桥气动特性的影响。【结果结果】(1)列车行车位置显著影响铁路桥阻力系数与升力系数,但对扭矩系数影响较小,其中列车位于线1时引发的干扰效应最为显著;(2)桥梁相对迎风位置主要影响铁路桥升力系数与扭矩系数,尤其是在正风攻角的情况下,铁路桥位于背风侧时升力系数的气动力系数干扰因子最高达1.8,扭矩系数波动幅度达50%;(3)风攻角演变导致气动力非线性响应,阻力系数与扭矩系数随风攻角的增大总体上呈递减趋势(降幅最高分别达75%和78%),而升力系数在多数工况下呈现出了减小-增大-减小的三阶段演化特征。【结论结论】揭示了复杂干扰环境下铁路桥气动力的敏感参数及其演变规律,可为并行桥梁抗风设计提供理论依据。[Purposes]This paper aims to investigate the aerodynamic interference between parallel highway and railway bridges.[Methods]Focusing on the Quanzhou Bay Cross-sea Bridge,this paper developed a 1∶60 scaled computational fluid dynamics(CFD)numerical model of the bridge girder section.By introducing the aerodynamic coefficient interference factor,it systematically investigated the effects of wind attack angle(-5°to 5°),the position of the bridge relative to wind direction,and the train position on the aerodynamic characteristics of the railway bridge.[Findings](1)The train position significantly influences the drag and lift coefficients of the railway bridge,while its impact on the torque coefficient is relatively minor.The most pronounced interference occurs when the train is on Line 1.(2)The position of the bridge relative to wind direction primarily influences the lift and torque coefficients of the railway bridge.In particular,under positive wind attack angle,when the railway bridge is on the leeward side,the aerodynamic coefficient interference factor of the lift coefficient reaches up to 1.8,and the torque coefficient fluctuates by as much as 50%.(3)Changes in the wind attack angle induce a nonlinear aerodynamic response.The drag and torque coefficients generally decrease as the wind attack angle increases with maximum reductions of 75%and 78%,respectively.Meanwhile,the lift coefficient exhibits a three-stage evolution pattern of"decrease-increase-decrease"in most cases.[Conclusions]This study identifies the parameters sensitive to aerodynamic interference and their evolution characteristics for railway bridges under complex interference conditions,providing theoretical support for the wind-resistant design of parallel bridges.

关 键 词：桥梁工程 高速铁路 计算流体动力学 气动干扰 风攻角 

分 类 号：U448.2[建筑科学—桥梁与隧道工程]