特大跨径桁架加劲梁桥颤振稳定性气动优化措施风洞试验研究
Journal of Highway and Transportation Research and Development(2010)
Abstract
以某特大跨径桁架加劲梁悬索桥为例,利用节段模型风洞试验,探讨研究桥面板中央开槽孔、加裙板、气动翼扳等各种气动控制措施对颤振临界风速的影响。试验结果表明,桥面板中央开槽、设置裙板、气动翼板都能够使桁架加劲梁桥颤振稳定性得到改善,但是都不能使各个攻角下的颤振临界风速都有所提高。气动翼板和桥面板中央开槽组合气动措施,且气动翼板的安装位置在桁架加劲梁弦杆,是最优化气动措施组合,可为类似大跨度桁架加劲梁桥抗风设计做参考。
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Key words
flutter stability,pneumatic winglet,wind tunnel test,segmental model,critical flutter wind speed,aerodynamic optimization measure,bridge engineering
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