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1989 Fiscal Year Final Research Report Summary

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

Research Project

Project/Area Number 62460103
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 機械力学・制御工学
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

TANI Junji  Tohoku Univ., Inst. Fluid Science, Prof., 流体科学研究所, 教授 (30006192)

Co-Investigator(Kenkyū-buntansha) OHTOMO Kikuo  Tohoku Univ., Inst. Fluid Science, Assist., 流体科学研究所, 助手 (10006182)
SUDO Seiichi  Tohoku Univ., Inst. Fluid Science, Assist., 流体科学研究所, 助手 (90006198)
YAMADA Motohiko  Tohoku Univ., Fac. Engineering, Asso. Prof., 工学部, 助教授 (90005471)
HASHIMOTO Hiroyuki  Tohoku Univ., Inst. Fluid Science, Prof., 流体科学研究所, 教授 (10006174)
Project Period (FY) 1987 – 1989
KeywordsActive Control / Fluid-Coupled Vibration / Thin-Walled Structures / Pipe / Shell / Beam / Tendon Mechanism / Piezoelectric Actuator
Research Abstract

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.

  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 土岐仁・谷順二: "片持送水管の安定性とその能動制御(テンドンによる安定化の一試み)" 日本機械学会論文集C編. 54. 357-362 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] J.Tani,H.Doki,G.Lin,F.Takahashi,S.Kodama & M.Chiba: "Active Vibration Control of a Cantilever Beam by a Piyoelectric Ceramic Actuator" Proc.IUTAM/IFAC Symp,on Dynamics of Controlled Mechanical Systems. 1. 107-118 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Uematsu,K.Uchiyama,M.Yamada & S.Sanjyo: "Ovalling Oscillations of Thin Circular Cylindrical Shells in a Cross Flon" J.Fluids & Structures. 2. 285-307 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 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)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 児球昭太郎・谷順二: "一様流中における角柱の振動(第1報:実験)" 日本機械学会論文集C編. 55. 2713-2717 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 高橋史明・谷順二: "液体ジェットにより横従動力を受ける片持ばりの能動制御" 日本機械学会論文集C編. 55. 1199-1205 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 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.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Uematsu, K. Uchiyama, M. Yamada and S. Sanjyo: "Overlling Oscillations of Thin Circular Cylindrical Shells, in a Cross Flow." J. Fluids & Structures, Vol.2, No.2, pp. 285-307, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Chiba, J. Tani and N. Yamaki: "Dynamic Stability of Liquid-Filled Cylindrical Shells under Vertical Excitation, Part I: Experiment Results, Part II: Theoretical Results." Earthquake Engineering and Structural Dynamics, pp. 23-36, 37-51, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 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.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Kodama and J. Tani: "Vibration of a Cantilever Beam with Square Section in Smooth Flow (1st Report, Experiment)." Trans. JSME, Vol. 55, No. 510, pp. 2713-2717, 1989.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-26  

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