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Broad-band reduction of the noise radiation from a panel based on the optimization of periodic metamaterials

Research Project

Project/Area Number 16K06155
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Dynamics/Control
Research InstitutionGifu University

Principal Investigator

Matsumura Yuichi  岐阜大学, 工学部, 教授 (20315922)

Co-Investigator(Kenkyū-buntansha) 古屋 耕平  岐阜大学, 工学部, 准教授 (40580056)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsパネル放射音 / 周期構造 / 振動制御 / 機械力学 / 機械力学・制御
Outline of Final Research Achievements

We aimed to establish a design method that optimizes multiple eigenmodes of a panel by using metamaterials to realize the broad-band reduction of the noise radiation from the panel. The eigenmodes of the panel are each composed of only the wave propagating on the panel at a specific angle, which is almost the same angle with multiple natural vibrations. Therefore, by attaching an effective periodic structure only to waves of this angle, we showed how to make it difficult for waves of angles forming multiple eigenmodes to propagate on the panel. As a result, the vibrations of multiple eigenmodes can be simultaneously reduced, and the acoustic radiation efficiency can also be controlled. Moreover, it was clarified that this effect is more emphasized by incorporating the effect of "Mukuri" which is known by the roaring dragon of Nikko Toshogu.

Academic Significance and Societal Importance of the Research Achievements

騒音が問題となる機械の代表である自動車の開発では,自動運転技術や電動化の進展に伴い,車内の静粛性への要求が今後益々高まると予想されている。車内音は,ルーフやフロアーなどのパネルからの放射音が原因とされるが,従来技術の延長線上では,静粛性を格段に向上させるのが難しく,音を逆相の音で打ち消すアクティブ制御が解決策の一つとされる。しかしながら,アクティブ制御には,追加の制御装置の搭載が必要で,駆動のために電力も必要とする。提案法によれば,コストをかけずに,パネルの形状を変化させておくだけで,車内音を広帯域に低減できる可能性がある。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (10 results)

All 2019 2018 2017 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 1 results) Remarks (3 results)

  • [Journal Article] Vibration reduction method using passive control of wave propagation by a neutralizer2019

    • Author(s)
      MORI Atsuo、MATSUMURA Yuichi、IZUMIYA Hisa
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 85 Issue: 873 Pages: 18-00437-18-00437

    • DOI

      10.1299/transjsme.18-00437

    • NAID

      130007653333

    • ISSN
      2187-9761
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Vibration reduction of a panel structure by controlling a modal group having the same direction of wave number vector2019

    • Author(s)
      Yuuta Shimizu, Yuichi Matsumura, Kohei Furuya, Ryouichi Ishikawa
    • Organizer
      Internoise 2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 骨組構造における断面変形を伴う波動モード間の反射/透過係数の算出法2018

    • Author(s)
      清水裕太,松村雄一,古屋耕平,山田朋,國井翔太
    • Organizer
      日本騒音制御工学会平成 30(2018)年秋季研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 波動伝播の可視化を利用したフレームからパネルへの振動伝達の低減法2018

    • Author(s)
      清水裕太,松村雄一,古屋耕平
    • Organizer
      Dynamics and Design Conference 2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] 複数の共振周波数の同時配置に供する結合剛性の設計法2018

    • Author(s)
      尾崎広典,駒田匡史,松村雄一,古屋耕平
    • Organizer
      Dynamics and Design Conference 2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] 強制振動の周波数特性を平滑化するための連続体型動吸振器の最適設計2018

    • Author(s)
      黒木駿,駒田匡史,松村雄一,古屋耕平
    • Organizer
      Dynamics and Design Conference 2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] 周期構造を利用した機能性モード形の設計2017

    • Author(s)
      渡辺翔,松村雄一,古屋耕平
    • Organizer
      日本機械学会機械力学・計測制御部門講演会2017
    • Related Report
      2017 Research-status Report
  • [Remarks] 岐阜大学機械力学研究室(松村研究室)補助事業

    • URL

      https://www1.gifu-u.ac.jp/~dyn/hojo.html

    • Related Report
      2018 Annual Research Report
  • [Remarks] 岐阜大学機械力学研究室

    • URL

      https://www1.gifu-u.ac.jp/~dyn/index.html

    • Related Report
      2017 Research-status Report
  • [Remarks] 岐阜大学機械力学研究室

    • URL

      http://www1.gifu-u.ac.jp/~dyn/index.html

    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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