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Structural health monitoring of structures by strain measurement and force identification

Research Project

Project/Area Number 18K04019
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 20010:Mechanics and mechatronics-related
Research InstitutionToyohashi University of Technology

Principal Investigator

Kawamura Shozo  豊橋技術科学大学, 工学(系)研究科(研究院), 教授 (00204777)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords振動工学 / 健全性評価 / 周波数応答関数 / ひずみ測定 / 外力同定 / 不規則応答 / パワースペクトル / 自己相関関数
Outline of Final Research Achievements

The purpose of the research is "identification of the place where the abnormality occurs" and "identification of random excitation". Regarding "identification of the location of the anomaly", we proposed a method for identifying the anomaly occurrence hierarchy by using the fact that only the strain of the wall of the hierarchy in which the anomaly occurred changes from the normal time for the hierarchical structure. Next, we developed a method to quantitatively identify the degree of anomaly using the frequency response function of the structure and the transmissibility function between layers. In each case, the validity could be verified by numerical simulation and experiment. For "identification of irregular external force", we calculated the spectrum from the measured random response data and constructed a method to identify the spectrum of random excitation using the correlation function of the system. The validity could be almost verified by numerical simulation and experiment.

Academic Significance and Societal Importance of the Research Achievements

本研究課題は機械や構造物の健全性評価に関する研究であり,持続可能社会の実現のために非常に重要な技術課題である.学術的には健全性評価は逆問題に属する研究である.逆問題は結果から原因を推定する問題であり,一意に原因を特定することは非常に難しい.その困難を,対象物の構造的な特徴を表す数学モデルに基づいて解決している.また周波数応答関数という既知の特性を,従来とは異なる取り扱いをすることによって健全性に有効に利用している.社会的にはインフラの健全性評価に直結する成果である.

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (10 results)

All 2020 2019 2018

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (5 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Proposition of Isolation Table Considering the Long-Period Earthquake Ground Motion (Method of Changing Natural Frequency of Isolation System with Additional Spring)2020

    • Author(s)
      Shozo Kawamura, Tetsuhiko Owa, Tomohiko Ise, Masami Matsubara
    • Journal Title

      Vibration Engineering for a Sustainable Future

      Volume: 2 Pages: 245-253

    • DOI

      10.1007/978-3-030-48153-7_32

    • ISBN
      9783030481520, 9783030481537
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Study of the Effect of Shape Processing of a Specimen on the Modal Properties2020

    • Author(s)
      Shozo Kawamura, Go Kikuchi, Masami Matsubara
    • Journal Title

      Vibration Engineering for a Sustainable Future

      Volume: 3 Pages: 81-87

    • DOI

      10.1007/978-3-030-46466-0_12

    • NAID

      130007997956

    • ISBN
      9783030464653, 9783030464660
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Identification of Statistical Characteristics of Random Excitation Acting on Machines or Structures2020

    • Author(s)
      Shozo Kawamura, Takuo Henmi, Masami Matsubara
    • Journal Title

      Vibration Engineering for a Sustainable Future

      Volume: 3 Pages: 89-95

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structural health monitoring of layered structure by strain measurements2019

    • Author(s)
      Shozo Kawamura, Sho Miyagi, Tomohiko Ise, Masami Matsubara
    • Journal Title

      Mechanical Engineering Journal

      Volume: 6 Issue: 1 Pages: 18-00390-18-00390

    • DOI

      10.1299/mej.18-00390

    • NAID

      130007591115

    • ISSN
      2187-9745
    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Identification of external force acting on machines or structures (Improvement method by additional mass and truncated singular values)2018

    • Author(s)
      河村庄造,平原直人,伊勢智彦,松原真己
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 84 Issue: 864 Pages: 18-00061-18-00061

    • DOI

      10.1299/transjsme.18-00061

    • NAID

      130007440026

    • ISSN
      2187-9761
    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Identification of statistical characteristics of random excitation acting on machines or structures2019

    • Author(s)
      Takuo Henmi
    • Organizer
      The 18th Asia Pacific Vibration Conference, Sydney, Australia
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Proposition of isolation table considering the long-period earthquake ground motion (Method of changing natural frequency of isolation system with additional spring)2019

    • Author(s)
      Tetsuhiko Owa
    • Organizer
      The 18th Asia Pacific Vibration Conference, Sydney, Australia
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Study of the effect of shape processing of a specimen on the modal properties2019

    • Author(s)
      Go Kikuchi
    • Organizer
      The 18th Asia Pacific Vibration Conference, Sydney, Australia
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Structural health monitoring of layered structure by strain measurements2018

    • Author(s)
      Sho Miyagi
    • Organizer
      the 25th International Congress on Sound and Vibration
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] ひずみ測定による層状構造物の健全性評価(実験による適用性の検証)2018

    • Author(s)
      宮城 祥
    • Organizer
      日本機械学会2018年度年次大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-03-16  

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