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Excitation mechanism of flow-induced vibrations generated on elastic plates in air flow with fluctuation and non-contact suppression

Research Project

Project/Area Number 22K14206
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 20010:Mechanics and mechatronics-related
Research InstitutionKogakuin University (2024)
Aoyama Gakuin University (2022-2023)

Principal Investigator

Hiroaki Keiichi  工学院大学, 工学部, 准教授 (20781082)

Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2024: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords変動流 / 空力加振 / 流体関連振動 / 流体構造連成 / 風洞実験 / 離散渦法 / 柔軟媒体 / 非線形解析
Outline of Research at the Start

薄く柔軟な弾性平板はスマートフォンなどの電子機器のディスプレイ用の偏光フィルムなどをはじめとして,多くの工業製品に利用されており,近年急激に需要が高まっている.弾性平板の製造工程において変動流に起因した振動が発生し,平板の傷や破損などの品質不良の原因となっている.このため,製品の品質や生産性の向上を目指す上で,上記の振動の特性解明と制振手法を確立が急務である.そこで,本研究ではこの振動の励振機構を解明し,さらに得られた知見を基に簡易的かつ効果的な制振手法を確立することを目指す.

Outline of Final Research Achievements

Thin elastic plates are used in many industrial products. During the manufacturing process of these elastic plates, violent vibrations occur in the plates due to pulsation of fluid flow, which causes quality defects. For this reason, in this study, the mechanism of the vibration was clarified through both experiments and analysis. Moreover, based on the mechanism, a method to suppress the vibration was developed.

Academic Significance and Societal Importance of the Research Achievements

流体流れに起因した振動問題は柔軟媒体の製造プロセスに限らず,様々な機械で発生しており,生産性を低下させる原因となっている.このため,製造の効率化の観点からこのような振動を取り除くことは極めて重要である.これに対して本研究の「励振機構に立脚した制振機構」は,複雑な制御系を設計することなしに制振を行うことができるためシンプルであり,他の様々な流体関連振動問題の制振に応用が期待できる.

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (13 results)

All 2024 2023 2022

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Flutter generated on a sheet in 3D flow: influence of aspect ratio of sheets on post-critical and hysteretic behavior2024

    • Author(s)
      Hiroaki Keiichi、Watanabe Masahiro
    • Journal Title

      Nonlinear Dynamics

      Volume: 112 Issue: 18 Pages: 15757-15770

    • DOI

      10.1007/s11071-024-09855-7

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Flutter characteristics of a sheet with an elastic support in three-dimensional uniform flow2024

    • Author(s)
      Hiroaki Keiichi、Watanabe Masahiro
    • Journal Title

      Journal of Fluids and Structures

      Volume: 127 Pages: 104129-104129

    • DOI

      10.1016/j.jfluidstructs.2024.104129

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] Flutter analysis and wind-tunnel experiments of a flat plate suspended by wires2023

    • Author(s)
      HIROAKI Keiichi、SASADA Keisuke、IINUMA Hiroyuki、WATANABE Masahiro
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 89 Issue: 928 Pages: 23-00202-23-00202

    • DOI

      10.1299/transjsme.23-00202

    • ISSN
      2187-9761
    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nonlinear vibration response of a rectangular sheet under harmonic forced excitation in three-dimensional uniform flow: Influence of excitation amplitudes on frequency response2023

    • Author(s)
      Keiichi Hiroaki, Kensuke Sugimoto, Kohei Hayasaka, Masahiro Watanabe
    • Journal Title

      Journal of Fluids and Structures

      Volume: 119 Pages: 103871-103871

    • DOI

      10.1016/j.jfluidstructs.2023.103871

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] 周期的な変動流中のシートに励起される空力弾性振動(振動の発生メカニズムの考察と振動の抑止)2024

    • Author(s)
      金 源、廣明 慶一、渡辺 昌宏
    • Organizer
      日本機械学会 2024年度年次大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 乱流中で支持されたシートに発生する流れ励起振動の特性2024

    • Author(s)
      石黒 聖也、廣明 慶一、渡辺 昌宏
    • Organizer
      日本機械学会 2024年度年次大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 一様流中で支持されたシートのモーダルパラメータに流速が及ぼす影響2024

    • Author(s)
      石黒 聖也、早坂 考平、廣明 慶一、渡辺 昌宏
    • Organizer
      Dynamics and Design Conference 2024
    • Related Report
      2024 Annual Research Report
  • [Presentation] Influence of Aspect Ratio of Sheets on Flutter Characteristics2023

    • Author(s)
      Hiroaki Keiichi、Watanabe Masahiro
    • Organizer
      ASME PVP2023
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] 周期的な空力加振を受けるシートに発生する空力弾性振動の非線形解析2023

    • Author(s)
      廣明慶一、渡辺昌宏
    • Organizer
      D&D2023
    • Related Report
      2023 Research-status Report
  • [Presentation] Post critical behavior of a fluttering sheet in air flow2022

    • Author(s)
      Keiichi Hiroaki, Masahiro Watanabe
    • Organizer
      Fluids, Structures, and Sound Symposium in Honour of Dr. David S. Weaver
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 気流中の有限幅矩形シートに励起されるフラッタの数値計算: シート側端まわりの流れがフラッタ特性に及ぼす影響2022

    • Author(s)
      廣明慶一,渡辺昌宏
    • Organizer
      Dynamics and Design Conference 2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 気流中で強制加振を受けるシートに励起される振動の非線形解析2022

    • Author(s)
      廣明慶一,杉本賢祐,早坂孝平,渡辺昌宏
    • Organizer
      日本機械学会年次大会 2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 気流中で強制加振を受けるシートの振動特性に関する実験的研究(加振振幅が周波数応答特性に及ぼす影響)2022

    • Author(s)
      杉本賢祐,早坂孝平,廣明慶一,渡辺昌宏
    • Organizer
      日本機械学会年次大会 2022
    • Related Report
      2022 Research-status Report

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Published: 2022-04-19   Modified: 2026-01-16  

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