横风下车桥系统气动特性的风洞试验研究

发布时间：2019-05-14 21:42

【摘要】：为考虑车辆和桥梁的相互气动影响,利用研制的测试装置,测试了不同工况下车辆和桥梁的气动力系数,讨论了风场的紊流特性、风速、前后车辆干扰、车辆横向距离对车辆气动力系数的影响以及车辆对桥梁静三分力系数的影响;通过分析研究车辆和桥梁表面压力测试结果,探究了车辆和桥梁气动特性发生变化的原因,验证了测试数据的准确可靠性。研究结果表明:风场的紊流特性、前后车辆干扰以及车辆横向距离对车辆气动力系数有较大的影响,而风速对其基本没有影响;另外,桥梁静三分力系数受车辆的影响也比较大。
[Abstract]:In order to consider the interaction between vehicle and bridge, the hydrodynamic coefficients of vehicles and bridges under different working conditions are tested by using the developed testing device, and the turbulence characteristics of wind field, wind speed and vehicle disturbance before and after wind field are discussed. The influence of the lateral distance of the vehicle on the hydrodynamic coefficient of the vehicle and the influence of the vehicle on the static three-component force coefficient of the bridge; By analyzing and studying the surface pressure test results of vehicles and bridges, the causes of the change of pneumatic characteristics of vehicles and bridges are explored, and the accurate reliability of the test data is verified. The results show that the turbulent characteristics of the wind field, the disturbance of the vehicle before and after the vehicle and the lateral distance of the vehicle have great influence on the hydrodynamic coefficient of the vehicle, but the wind speed has no effect on it. In addition, the static three-component force coefficient of the bridge is also greatly affected by the vehicle.
【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土木与环境工程系;湖南大学风工程试验研究中心;
【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 824140)
【分类号】：U446;U441.3;U461.1

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