主梁上方安装固定风板抑制悬索桥颤振的研究

推演了主梁上方安装固定风板后整个桥梁主梁气动截面的自激力表达式及主梁单元气动刚度和气动阻尼矩阵的表达式。以某悬索桥设计方案为工程背景，应用多模态颤振分析方法，研究了在主梁上方安装固定风板这种控制措施对改善系统颤振稳定性的效果。分析结果表明，主梁上方安装固定风板对悬索桥颤振是一种有效的气动控制措施。

Study of Suppressing the Flutter of a Suspension Bridge with StationaryAirfoils Attached above the Leading and Trailing Edges of the Bridge Deck

In the paper, both the formulas of self excited aerodynamic forces acting on a section of bridge deck and the expressions of aerodynamic stiffness and aerodynamic damping matrices of bridge deck elements with stationary airfoils attached above the leading and trailing edges of the bridge deck are derived. On the engineering background of a suspension bridge tender project, the effectiveness of the airfoils in the flutter stability of the system is studied by a multi mode flutter analysis approach. The analysis results show that the countermeasure is an effective aerodynamic means for suppressing the flutter of the suspension bridge.