Aeroelastic Control of Long-Span Suspension Bridges
Aeroelastic Control of Long-Span Suspension Bridges
复制标题
大跨度悬索桥的气动弹性控制
DOI：
10.1115/1.4003723
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Graham J
中科院分区：
文献类型：
--
作者：
Graham J
考虑了大跨度悬索桥的建模、控制和动态稳定。通过组合使用前缘和后缘襟翼，我们表明可以显着增加颤振和扭转发散的临界风速。在将其用于气动弹性稳定性和控制系统设计研究之前，将详细研究相对不太为人所知的前缘襟翼的空气动力学特性。作为桥梁截面模型构建练习的一部分，将研究经典 Theodorsen 循环函数的最佳近似。虽然可以使用各种各样的控制系统，但我们专注于可以使用弹簧、阻尼器、变速箱和杠杆等被动机械部件来实现的补偿方案。研究了通过感测主甲板俯仰角来控制前缘和后缘襟翼的单环控制系统。主要发现是，通过被动反馈控制，可以大大提高桥梁截面模型颤振和扭转发散的临界风速，并具有良好的鲁棒性特性。静态小翼被证明相对无效。
The modeling, control, and dynamic stabilization of long-span suspension bridges are considered. By employing leading- and trailing-edge flaps in combination, we show that the critical wind speeds for flutter and torsional divergence can be increased significantly. The relatively less well known aerodynamic properties of leading-edge flaps will be studied in detail prior to their utilization in aeroelastic stability and control system design studies. The optimal approximation of the classical Theodorsen circulation function will be studied as part of the bridge section model building exercise. While a wide variety of control systems is possible, we focus on compensation schemes that can be implemented using passive mechanical components such as springs, dampers, gearboxes, and levers. A single-loop control system that controls the leading- and trailing-edge flaps by sensing the main deck pitch angle is investigated. The key finding is that the critical wind speeds for flutter and torsional divergence of the sectional model of the bridge can be greatly increased, with good robustness characteristics, through passive feedback control. Static winglets are shown to be relatively ineffective.
变增益控制在桥面颤振气动控制中的应用
DOI：
--
发表时间：
1996
期刊：
Proceedings of 35th IEEE Conference on Decision and Control
影响因子：
--
作者：
K. Wilde;Y. Fujino
通讯作者：
Y. Fujino