AERODYNAMIC ACTIVE CONTROL FOR SUPPRESSING FLUTTER OF SUPER-LONG SUSPENSION BRIDGE

抑制超长悬索桥颤振的气动主动控制

• 批准号: 06650524
• 负责人: KUBO Yoshinobu
• 金额: $ 1.47万
• 依托单位: KYUSHU INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650524/
• 关键词: SUPER-LONG BRIDGE; FLUTTER; ACTIVE CONTROL; CONTROL OF SEPARATION FLOW; ROTOR; UNSTEADY PRESSURE; 境界層制御; 制振

The object of the research project is how to suppress aerodunamic instability of super-long suspension bridge, which will be constructed in 21st century. The problem to be solved is to suppress flutter of super-long suspension bridge or to increase the flutter-on-set wind velocity by a certain technical method. A few methods are already proposed. Most of them are the methods to improve the dynamic performances by changing structural performances. On the other hand, the present method is based on the idea to control aerodynamic forces inducing flutter of girder of super-long suspension bridge. Since the predominant aerodynamic forces are generated by the separation flow from the leading edge of the girder, in the present research, the separation flow from leading edge is controlled by setting the rotor at the leading edge of shallow rectangular cylinder, which is the typical cross section of the bridge girder.The experiments are conducted by using the wind tunnel. The aerodynamic responses and unsteady aerodynamic surface pressures are measured. According to the experimental results, the flutter-on-set wind velocity is raised up to 3 times of without rotor. The boundary layr is shrank by rotaing the cylinder and the surface pressure fluctuation is suppressed.The results show the usefulness to improve the aerodynamic performances of the super-long suspension bridge.

研究项目的目的是如何抑制超长悬架桥的机动不稳定，该桥梁将于21世纪建造。要解决的问题是抑制超长悬架桥的颤动，或通过某种技术方法增加扑动的风速。已经提出了一些方法。其中大多数是通过改变结构性能来改善动态性能的方法。另一方面，目前的方法是基于控制诱导超长悬架桥梁颤动的空气动力的想法。由于主要的空气动力是由与梁的前缘的分离流产生的，因此在当前的研究中，通过将转子设置在浅矩形圆柱的前缘，从而控制了从前缘的分离流，这是桥梁围栏的典型横截面。测量空气动力学反应和不稳定的空气动力表面压力。根据实验结果，在没有转子的情况下，扑面而置的风速高达3次。边界线通过旋转气缸进行缩减，并抑制了表面压力波动。结果表明，改善了超长悬架桥的空气动力学性能的有用性。

项目成果

久保喜延: "インテリジェントな橋梁を目指して" 橋梁. Vol.10. 47-49 (1994)

久保嘉信：“迈向智能桥梁”第 10 卷（1994 年）。

Y.KUBO,E.YUKOKU,K.KATO,K.MORITA: "SUPPRESSION OF FLUTTER BY BOUNDARY LAYER CONTROL" JOURNAL OF JAPAN WIND EINGINEERING. VOL.63. 93-94 (1995)

Y.KUBO，E.Yukoku，K.KATO，K.MORITA：“通过边界层控制抑制颤振”日本风工程杂志。

久保喜延,幽谷栄二郎,加藤九州男,森田恵三郎: "境界層制御によるフラッター制振法" 日本風工学会誌. 63. 93-94 (1995)

Yoshinobu Kubo、Eijiro Yutani、Kyushuo Kato、Keizaburo Morita：“使用边界层控制的平坦阻尼方法”日本风工程学会杂志 63. 93-94 (1995)。

久保喜延,幽谷栄二郎,加藤九州男,森田恵三郎: "フラッター制振への境界層制御の利用" 土木学会振動制御コロキウムpartB. 63-68 (1995)

Yoshinobu Kubo、Eijiro Yutani、Kyushuo Kato、Keizaburo Morita：“使用边界层控制进行颤振阻尼”日本土木工程师学会振动控制研讨会第 B.63-68 部分（1995 年）

Y.KUBO,E.YUKOKU,K.KATO,K.MORITA: "APPLICATION OF BOUNDARY LAYER CONTROL TO SUPPRESSION OF FLUTTER" 2ND COLLOQUIUM ON VIBRATION CONTROL OF STRUCTURES. 63-68 (1995)

Y.KUBO、E.Yukoku、K.KATO、K.MORITA：“边界层控制在抑制颤振中的应用”第二届结构振动控制研讨会。