Aerodynamic control of Long span Bridges

大跨度桥梁的气动控制

• 批准号: EP/H029982/1
• 负责人: John Graham
• 金额: $ 39.14万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2010
• 资助国家: 英国
• 起止时间: 2010 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FH029982%2F1
• 关键词: Aerodynamic; control; Long; span; Bridges

The research program will carry out CFD and wind tunnel tests of the stability and buffet response of flexibly-mounted bridge deck models. The bridge decks will be fitted with aerodynamic control surfaces of the oscillating flap type. A combination of sensors on the deck, a digital control system and electrical actuation of the flaps will be used to increase the bridge stability in the heave-torsion mode. Quasi-three-dimensional CFD will be used first to compute flutter boundaries. The critical wind speed for flutter onset will be evaluated from the responses at different subcritical wind speeds. The system response to indicial control-surface movement will also be computed and the results used to model bridges, first on a section of the deck and later on a three-dimensional model of a full bridge. Measurements will be made, for a range of bridge parameters including deck geometry and smooth/turbulent incident winds, to assess the effectiveness of the system in increasing critical flutter speeds and alleviating buffeting and vortex-induced-vibration for full scale suspension and cable-stayed bridges. These tests will also be used to validate the numerical results.

该研究计划将对柔性安装桥面模型的稳定性和抖振响应进行CFD和风洞试验。桥面板将安装振动襟翼型空气动力控制面。甲板上的传感器、数字控制系统和襟翼的电动驱动的组合将用于增加桥梁在垂荡-扭转模式下的稳定性。准三维CFD将首先用于计算颤振边界。颤振起始的临界风速将根据不同亚临界风速下的响应进行评估。还将计算系统对指示操纵面运动的响应，并将结果用于桥梁建模，首先是桥面的一部分，然后是全桥的三维模型。将对一系列桥梁参数（包括桥面几何形状和平稳/湍流入射风）进行测量，以评估该系统在提高全尺寸悬索桥和斜拉桥的临界颤振速度和减轻抖振和涡激振动方面的有效性。这些测试也将用于验证数值结果。

项目成果

Aeroelastic Control of Long-Span Suspension Bridges

大跨度悬索桥的气动弹性控制

• DOI: 10.1115/1.4003723
• 发表时间: 2011
• 期刊: Journal of Applied Mechanics
• 作者: Graham J

Buffet loading, dynamic response and aerodynamic control of a suspension bridge in a turbulent wind

• DOI: 10.1016/j.jfluidstructs.2016.01.013
• 发表时间: 2016-04
• 期刊: Journal of Fluids and Structures
• 影响因子: 3.6
• 作者: Xiaowei Zhao;Kevin Gouder;J. Graham;D. Limebeer

The effect of three-dimensionality on the aerodynamic admittance of thin sections in free stream turbulence

• DOI: 10.1016/j.jfluidstructs.2015.05.012
• 发表时间: 2015-08
• 期刊: Journal of Fluids and Structures
• 影响因子: 3.6
• 作者: M. Massaro;J. Graham

Passive aeroelastic control of a suspension bridge during erection

• DOI: 10.1016/j.jfluidstructs.2016.08.008
• 发表时间: 2016-10
• 期刊: Journal of Fluids and Structures
• 影响因子: 3.6
• 作者: K. Bakis;D. Limebeer;Martin S. Williams;J. Graham

Passive Control of Bridge Wind-Induced Instabilities by Tuned Mass Dampers and Movable Flaps

• DOI: 10.1061/(asce)em.1943-7889.0001287
• 发表时间: 2017-09
• 期刊: Journal of Engineering Mechanics-asce
• 作者: K. Bakis;M. Massaro;Martin S. Williams;J. Graham