Active Control of the Fluid-Coupled Vibration of Thin-Walled Structures

薄壁结构流耦合振动的主动控制

• 批准号: 62460103
• 负责人: TANI Junji
• 金额: $ 3.33万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62460103/
• 关键词: Active Control; Fluid-Coupled Vibration; Thin-Walled Structures; Pipe; Shell; Beam; Tendon Mechanism; Piezoelectric Actuator; 動的不安定現象; トランスピュ-タ; 能動制御; 理論; 実験

The thin-walled structures such as pipes and shells are easy to become the dynamic instability connected with fluid, that is flutter and divergence. To stabilize the flow-induced vibration of the thin-walled structures, an active control method was proposed in this study.At first theoretical studies on the dynamic stability and active control of cantilevered pipes conveying fluid were conducted. In order to control the response of the cantilevered pipe, an active control force was derived by the torque produced by a pair of tendons attached to the pipe. And also piezoelectric actuators was used to generate the torque. The problem was solved by means of the Galerkin method, in conjunction with the optimal regulator theory. The numerical simulation of the response of the pipe conveying fluid was also carried out for various conditions. It was found that the active control method using the tendon mechanism and the piezoelectric actuator is effective to stabilize the pipe conveying fluid, even if the control input is limited.Next, the theoretical results were confirmed by the experiment in which DC servo motors and piezoelectric actuators were used. Also the minimum order state observer and the digital optimum regulator theory were used with personal computers.Furthermore, the flow-induced vibration of shells was found to be suppressed by the active control.

薄壁结构如管道、壳体等容易发生与流体有关的动力失稳，即颤振和发散。本文针对薄壁结构的流激振动问题，提出了一种主动控制方法，首先对悬臂输流管道的动力稳定性和主动控制进行了理论研究。为了控制悬臂管道的响应，主动控制力是由连接到管道上的一对预应力筋产生的扭矩导出的。同时采用压电驱动器产生力矩。这个问题是解决的Galerkin方法，结合最优调节器理论。对不同工况下输流管道的响应进行了数值模拟。研究结果表明，在控制输入有限的情况下，采用腱机构和压电作动器的主动控制方法能够有效地稳定输流管道。其次，通过采用直流伺服电机和压电作动器的实验验证了理论结果。在微机上应用了最小阶状态观测器和数字最优调节器理论，并对壳体流激振动进行了主动控制。

项目成果

H. Doki, and J. Tani: "Dynamic Stability and Active Control of Cantilevered Pipes Conveying fluid (An Attempt of Stabilization by Tendon Control Method)." Trans. JSME, Vol. 54, No. 498, pp. 357-362, 1988.

H. Doki 和 J. Tani：“输送流体的悬臂管道的动态稳定性和主动控制（通过腱控制方法进行稳定的尝试）。”

谷順二、寺木潤一: 日本機械学会論文集,C編. 54. 73-79 (1988)

Junji Tani、Junichi Teraki：日本机械工程师学会会议录，C 版 54. 73-79 (1988)。

谷順二、酒井達能、千葉正克: "流体連成二重円筒殻の動的安定性" 日本機械学会論文集C編. 55. 870-877 (1989)

Junji Tani、Tatsuyoshi Sakai、Masakatsu Chiba：“流体耦合双圆柱壳的动态稳定性”，日本机械工程师学会会刊，C 版 55. 870-877 (1989)。

谷順二・張和炳: "液体を含む有限長回転円筒殻の振動" 日本機械学論文集C編. 54. 2633-2639 (1988)

Junji Tani 和 Hebing 张：“含有液体的有限长度旋转圆柱壳的振动”日本机械工程学会杂志 C. 54. 2633-2639 (1988)

F. Takahashi and J. Tani: "Active Control of a Cantilevered Beam Subjected to Transverse Follower Force of a Fluid Jet." Trans. JSME, Vol. 55, No. 513, pp. 1199-1205, 1989.

F. Takahashi 和 J. Tani：“受流体射流横向随动力作用的悬臂梁的主动控制”。