Suppression Method of Flexible Structure Aerodynamic Vibration by Active Control of Accelerating Fluid in Separating Shear Flow.

分离剪切流中加速流体主动控制柔性结构气动振动抑制方法。

基本信息

批准号：
01460171
负责人：
KUBO Yoshinobu
金额：
$ 2.56万
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 (B)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

The present research has been conducted to find the method how to apply the boundary layer control method on the suppression of aerodynamic responses of bluff bodies. The useful informations for suppression of aerodynamic responses of bluff body were obtained from the fundamental experiments of measuring surface pressure and aerodynamic responses of square prism with two rotating cylinders set on upstream corners.(1) The mean and fluctuating pressures can be controlled by controlling the rotary surface velocity of the rotating cylinder.(2) The higher rotary surface velocity leads the bluff body to be a more stream-lined body. In other words, the bluff body can be improved to the elongated body by accelerating the boundary layer by the rotating cylinder.(3) The most effective combination of rotary surface velocities of two rotating cylinders in the present research is the case that one is at rest and another is rotating with the velocity higher than 1.4 times of approaching flow velocity.(4) The case that the both rotating cylinders have the same rotary surface velocity has the tendency that the higher rotary surface velocity leads the aerodynamic responses to the higher on-set wind velocity of the galloping responses of the square cylinder.(5) The aerodynamic responses can be completely suppressed by the one rotary cylinder owing to disappearance of alternative surface pressure fluctuations between upper and lower side surface pressure.The extensive research will be conducted how to apply this method to the practical structures of super-long suspension bridges and super-high buildings which are proposed by Japanese government and some Japanese companies.

已经进行了本研究，以找到如何将边界层控制方法应用于抑制虚张声势的空气动力学反应的方法。从测量表面压力和正方形的表面压力和空气动力学响应的基本实验中获得抑制空气动力学反应的有用信息，并通过在上游角上设置了两个旋转的圆柱体的平方圆柱体的空气动力学响应。溪流的身体。换句话说，可以通过旋转圆柱加速边界层来改进悬崖的身体。（3）在本研究中，两个旋转圆柱体的旋转表面速度最有效的组合是，一个旋转圆柱体的静止状态是静止状态，一个是在静止状态，另一个是旋转的速度高于旋转速度的旋转量高于旋转的旋转频率。速度的趋势是，较高的旋转表面速度会导致空气动力学的响应对平方缸的捕捞响应的较高的盘中风速。日本政府和一些日本公司提出的超长悬挂桥和超高建筑物。