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MECHANISM OF VIBRATION SUPPRESSION EFFECT FOR CONNECTED CANTILEVERED STRUCTURE OSCILLATING IN-LINE DIRECTION IN CROSS FLOW

Research Project

Project/Area Number 12450094
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Dynamics/Control
Research InstitutionThe University of Tokyo

Principal Investigator

KANEKO Shigehiko  GRADUATE SCHOOL OF ENGINEERING, PROFESSOR, 大学院・工学系研究科, 教授 (70143378)

Co-Investigator(Kenkyū-buntansha) SAITOU Noboru  TOSHIBA CO., RESEARCH DIRECTOR, 電力産業システム技術開発センター, 室長(研究職)
WATANABE Tatsuo  GRADUATE SCHOOL OF ENGINEERING, Research Associate, 大学院・工学系研究科, 助手 (70011179)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥15,000,000 (Direct Cost: ¥15,000,000)
Fiscal Year 2002: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2001: ¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 2000: ¥6,300,000 (Direct Cost: ¥6,300,000)
KeywordsFLOW-INDUCED VIBRATION / SELF-EXCITED VIBRATION / ANTI-SYMMETRIC VOTICES / IN-LINE OSCILLATION / KARMAN VORTICES / SYMMETRIC VOTICES / DRAG FORCE / VORTEX SHEDDING / 連結構造 / 制振 / 双子渦 / 対象渦
Research Abstract

This study is related to self-excited in-line vibration of a thermo-well in liquid sodium cross flow experienced in Fast Breeder Reactor Monju. Although quite a large number of research on the in-line oscillation of a cantilevered cylinder have been conducted in Japan after the failure of the thermo-well, clear cut explanation of the cause of the vibration has not yet been done. Especially, the explanation on the reason why only single particular thermo-well was broken is not yet given and is still under investigation. From the viewpoint of academic interest, this is an exciting topic.
Therefore, we decided, to conduct precise measurement of fluid dynamic forces acting on the vibrating cylinder by using water tunnel at CRIERI Abiko Research Center under small forcing amplitude external excitations. In a series of experiments, we changed forcing amplitudes, oncoming flow velocities and excitation frequencies to check the effect of the dependency on the amplitude of the cylinder and reduced velocity.
As a result, we found the fact that fluid force is composed of the component proportional to acceleration, velocity and displacement of the vibrating circular cylinder. We also found that excitation parameter which determines the instability is strongly dependent on the cylinder amplitude. In addition, added mass coefficient varies depending on reduced velocity and the stability criteria of reduced damping is slightly affected by the mass ratio. Finally, we collected unsteady fluid dynamic data as a database for further studies.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] 西原 崇, 金子成彦, 安川亮一, 渡邉辰郎: "円柱構造物の抗力方向流力振動に関する研究(第1報)"日本機械学会論文集、C編. Vol.68, No.673. 2605-2613 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 西原 崇, 金子成彦, 安川亮一, 渡邉辰郎: "円柱構造物の抗力方向流力振動に関する研究(第2報)"日本機械学会論文集、C編. Vol.68, No.674. 2880-2888 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 安川亮一, 金子成彦, 西原 崇, 渡邉辰郎: "単一円柱における対称渦による抗力方向自励振動の発生機構"日本機械学会機械力学・計測制御講演論文アブストラクト集. No.01-5(CD-ROM). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 毛利泰裕, 金子成彦, 渡邉辰郎: "片持ち円柱構造物の抗力方向振動に関する実験的研究"東京大学総合試験所所報. Vol.58. 79-84 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 西原崇, 安川亮一, 金子成彦, 渡辺辰郎: "流れにさらされた円柱状構造物に作用する抗力方向付加流体力の測定"日本機械学会機械力学・計測制御講演論文アブストラクト集. No.00-6. 160 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 毛利泰裕, 木都孝洋, 渡辺辰郎, 金子成彦: "双子渦を伴う円柱のインライン振動計測"日本機械学会機械力学・計測制御講演論文集. No.99-7(I), Vol.A. 577-580 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takashi Nishihara, Shigehiko Kaneko, Ryoichi Yasukawa and Tatsuo Watanabe: "Flow-Induced Vibration in In-Line Direction of a Circular Cylinder in a Flow (1st report : Measurement of Added Fluid Forces in In-Line Direction Acting on a Circular Cylinder in a Flow)"Trans. JSME, Ser. C. 68,No.673. 2605-2613 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takashi Nishihara, Shigehiko Kaneko, Ryoichi Yasukawa and Tatsuo Watanabe: "Flow-Induced Vibration in In-Line Direction of a Circular Cylinder in a Flow (2nd report : Nonlinear Characteristics of Added Fluid Forces in In-Line Direction Acting on a Circular Cylinder in a Flow)"Trans. JSME, Ser. C. 68,No.674. 2880-2888 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ryoichi Yasukawa, Shigehiko Kaneko, Takashi Nishihara and Tatsuo Watanabe: "The Mechanism of In-Line Oscillation of a Single Cylinder Excited by Symmetric Vortices"Prep. JSME, CD-ROM. No.01-5. (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yasuhiro Mohri, Shigehiko Kaneko and Tatsuo Watanabe: "An Experimental Study for In-Line Vibration of a Cantilever Circular Cylinder"Annual report of Engineering Research Institute, School of Engineering, University of Tokyo. 58. 79-84 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takashi Nishihara, Ryoichi Yasukawa, Shigehiko Kaneko and Tatsuo Watanabe: "A Measurement of Added Fluid Forces in In-Line Direction Acting on a Cylindrical Structures in a Flow"Prep. JSME. No.00-6. 160 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yasuhiro Mohri, Kido Takahiro, Tatsuo Watanabe and Shigehiko Kaneko: "Measurements of In-Line Vibration of a Circular Cylinder Accompanied with Symmetric Vortices"Prep. JSME. A, No.99-7(I). 577-580 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 西原 崇, 金子成彦, 安川亮一, 渡邉辰郎: "円柱構造物の抗力方向流力振動に関する研究(第1報)"日本機械学会論文集、C編. Vol.68,No.673. 2605-2613 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 西原 崇, 金子成彦, 安川亮一, 渡邉辰郎: "円柱構造物の抗力方向流力振動に関する研究(第2報)"日本機械学会論文集、C編. Vol.68,No.674. 2880-2888 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 安川亮一, 金子成彦, 西原 崇, 渡邊辰郎: "単一円柱における対称渦による抗力方向自励振動の発生機構"日本機械学会機械力学・計測制御講演論文集. No.00-6. 168-174 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 毛利泰裕,木都孝洋,渡辺辰郎,金子成彦: "双子渦を伴う円柱のインライン振動計測"日本機械学会機械力学・計測制御講演論文集. NO.99-7(1)A. 577-580 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] 毛利泰裕,金子成彦,渡邉辰郎: "片持ち円柱構造物の抗力方向振動に関する実験的研究"東京大学総合試験所所報. Vol.58. 79-84 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 西原崇,安川亮一,金子成彦,渡邉辰郎: "流れにさらされた円柱状構造物に作用する抗力方向付加流体力の測定"日本機械学会機械力学・計測制御講演論文集. NO.00-6. 160 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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