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.

该研究计划将对灵活安装的桥梁甲板模型的稳定性和自助餐响应进行CFD和风洞测试。桥甲板将配备振荡襟翼类型的空气动力控制表面。甲板上的传感器，数字控制系统和襟翼的电动致动物的组合将用于在升降机模式下提高桥梁的稳定性。准三维CFD将首先用于计算扑动边界。将从不同的亚临界风速下的响应中评估扑动发作的临界风速。还将计算系统对指示控制表面运动的响应，并将用于建模桥梁的结果首先在甲板的一部分上，然后在完整桥的三维模型上进行。将对一系列桥接参数进行测量，包括甲板几何形状和光滑/湍流的入射风，以评估系统在提高临界颤动速度和减轻自助餐和涡流诱导的振动方面的有效性，以进行全尺度悬架和电缆固定的桥梁。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

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

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

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

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