不同交通流状态下桥梁气动导数的风洞试验研究

发布时间：2018-04-12 22:30

本文选题：风-车-桥系统 + 不同交通流　；参考：《实验力学》2014年05期

【摘要】：为了考虑实际运营车辆对桥梁气动导数的影响,根据车辆密度模拟了三种交通流状态,基于强迫振动装置,分别对每个交通流和无车状态下的桥梁气动导数进行风洞试验研究,讨论了不同攻角下不同车流的车辆对桥梁气动导数的影响,探究了车辆对气动导数影响的百分比以及气动导数变化量的变化规律。研究结果表明:不同攻角下不同车流的车辆均对直接导数A*2、H*4和交叉导数A*4、H*2影响显著,A*2、A*3变化量随着折减风速有一定的变化规律。虽然不同攻角下不同车流的车辆对气动导数的影响程度及影响规律不同,并且车流的繁忙程度对大多数气动导数的影响规律不明显,但是车辆对桥梁气动导数的影响不容忽略。
[Abstract]:In order to consider the influence of the actual operating vehicle on the aerodynamic derivative of the bridge, three traffic flow states are simulated according to the vehicle density. Based on the forced vibration device, the aerodynamic derivatives of the bridge in each traffic flow and the vehicle free state are studied by wind tunnel test, respectively.This paper discusses the influence of different vehicle flow on the aerodynamic derivative of bridge under different angles of attack, and probes into the percentage of the influence of vehicle on the aerodynamic derivative and the variation law of the variation of aerodynamic derivative.The results show that the influence of different vehicle flow at different angles of attack on the direct derivative A _ (2) O _ (2) H _ (4) and cross-derivative (A _ (2)) H _ (2) O _ (2) A _ (2) O _ (3) has a certain variation law with the wind speed reduction.Although the influence degree and law of different vehicle flow on aerodynamic derivative are different under different attack angle, and the influence of busy degree of vehicle flow on most aerodynamic derivative is not obvious, the influence of vehicle on bridge aerodynamic derivative can not be ignored.
【作者单位】：长沙理工大学桥梁工程安全控制省部共建教育部重点实验室;美国路易斯安那州立大学;
【基金】：国家自然科学基金资助项目(50908025;51178066;51108045;51278069) 长沙理工大学桥梁工程安全控制省部共建教育部重点实验室开放基金资助项目交通部西部交通科技项目重大科技专项资助项目(2011 318 824 140)
【分类号】：U441.3

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