摘要
本文首先建立了下风侧附加翼板桥梁主梁截面的自激气动力模型。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，分析了该桥架设阶段颤振临界风速的发展趋势。以其中最危险的架设阶段为例，研究了主梁下风侧设置翼板这种控制措施对系统颤振的控制效果。分析表明，主梁下风侧附加翼板对于悬索桥架设阶段的颤振是一种有效的气动控制措施。
In this paper, a model of self-excited aerodynamic forces acting on a section of bridge deck with additional airfoil attached below the trailing edge is established. A suspension bridge project is taken as an example, in which the evolution of critical wind speed of flutter during bridge erection is studied by a multi-mode flutter analysis approach. With the most dangerous construction stage as an example, the effectiveness of the airfoil in the flutter stability of the system is investigated. The analysis shows that the additional airfoil attached below the trailing edge of bridge deck is an effective aerodynamic means for suppressing the flutter of the suspension bridge during erection.
出处
《工程力学》
EI
CSCD
北大核心
2001年第5期77-83,共7页
Engineering Mechanics
基金
国家自然科学基金资助项目(59578001)
关键词
悬索桥
架设阶段
颤振稳定性
翼板
suspension bridges
construction stage
flutter stability
airfoil
