• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Fundamental Study on Development of Smart Marine Structures

Research Project

Project/Area Number 06452355
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 海洋工学
Research InstitutionThe University of Tokyo

Principal Investigator

KIMPARA Isao  University of Tokyo Division of Engng. Professor, 大学院・工学系研究科, 教授 (50011101)

Co-Investigator(Kenkyū-buntansha) OHSAWA Isamu  University of Tokyo Division of Engng. Assis. Res., 大学院・工学系研究科, 助手 (00143389)
SUZUKI Toshio  University of Tokyo Division of Engng. Assis. Res., 大学院・工学系研究科, 助手 (20010895)
KAGEYAMA Kazuro  University of Tokyo Division of Engng. Asso. Prof., 大学院・工学系研究科, 助教授 (50214276)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥5,500,000 (Direct Cost: ¥5,500,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1995: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1994: ¥3,500,000 (Direct Cost: ¥3,500,000)
KeywordsComposite Materials / Smart Structures / Damage Detection / Optical Fiber / Vibration Control / GFRP / Marine Structures / Doppler Effect / 光ファイバー / 振動検出 / レーザドップラー効果
Research Abstract

A fundamental study was performed aiming at the realization of a smart marine strucure, in which smart functions such as self-diagnosis or self-repairing are incorporated in structural material itself, in view of enhancing the structural reliability of ocean equipments and structures under severe environmantal conditions.
1) The methodology and the construction of sensors for damage detection were examined. Tensile test od singl optical fiber embedded in a resin, tensile and flexure tests of GFRP specimans were carried out, and it was shown that the damage of mebedded optical fibers were detected by OTDR (Optical Time Domain Reflectometer) and the applicability of optical fiber was confirmed as a distributed detector of critical strain. Fiber-optic velocity sensor was developed based on Laser-Doppler effect and deformation of tensile specimen under cyclic load, vibration of cantilever beam specimen were measured with the developed sensor in comparison with strain gages. The applicabilit … More y of fiber-optic strain sensors to marine structures was also discussed.
2) The possibility of active vibration control of flexible structure by applying piezoelectric actuators was examined. A cantiever beam specimen was manufactured and tested, in which a Bimorf piezoelectric element was incorporated as an actuator inducing flexural deformation as well as laser deflectometer and strain gages as sensors. A system identification of this active/adaptive atructure was carried out and thr active vibration control performance was evaluated.
3) Piezoelectric polymer films (polyvinylidene fluoride : PVDF) and the developed fiber-optic Laser Doppler Vibrometer (LDV) were applied to the vibration control of a flexible composite beam. Theoretical consideration confimed that the control system is always stable. In the experimental study, an analog control circuit was developed and applied to velocity feedback control of multi-modes vibration. The effectiveness of the control system was evaluated by simulation and experiments. Less

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] I.Kimpara: "APPROACH TO SMART COMPOSITE STRUCTURES" M&T-SPECIAL COMPOSITE AVANCES. NOV.-DEC.5-9 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 影山和郎他: "スマートストラクチャ概念の船体構造への適用に関する基礎研究(第1報、光ファイバによる変位と損傷の検出方法の検討)" 日本造船学会論文集. 第178号. 583-591 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Kageyama et al: "DAMEGE EVALUATION IN COMPOSITE MATERIALS WITH EMBEDDED FIBERS BY USING OPTICAL TIME-DOMAIN REFLECTOMETER" Progress in Advanced Materials and Mechanics. 700-705 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] I.Kimpara: "APPROACH TO SMART COMPOSITE STRUCTURES" M&T-SPECIAL COMPOSITES AVANCES-NOV.-DEC.5-9 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Kageyama ey al.: "Fundamental Study on Smart Structure Approach to Marine Structure, Part 1, Novel Methods for Fiber-Optic Measurement of Displacement and Damage" J.Soc. Nav. Archit. Jpn.No. 178 (Dec. 1995). 583-591 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Kageyama ey al.: "DAMAGE EVALUATION IN COMPOSITE MATERIALS WITH EMBEDDED FIBERS BY USING OPTICAL TIME-DOMAIN REFLECTOMETER" Progress in Advanced Material and Mechanics, T.Wanf and T-W Chou (Eds.), Proc. Intern. Comf. on Advanced Materials (Beijing, August 1996). 700-705 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] I.Kimpara: "APPROACH TO SMART COMPOSITE STRUCTURES" M&T-SPECIAL COMPOSITE AVANCES. NOV.-DEC.p5-p9 (1994)

    • Related Report
      1996 Annual Research Report
  • [Publications] 影山 和郎 他: "スマートストラクチャ概念の船体構造への適用に関する基礎研究(第1報、光ファイバによる変位と損傷の検出方法の検討)" 日本造船学会論文集. 第178号. p583-p591 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Kageyama et al: "DAMAGE EVALUATION IN COMPOSITE MATERIALS WITH EMBEDDED FIBERS BY USING OPTICAL TIME-DOMAIN REFLECTOMETER" Progress in Advanced Materials and Mechanics. p700-p705 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 影山和郎: "スマートストラクチャ概念の船体構造への適用に関する基礎研究(第1報、光ファイバによる変位と損傷の検出方法の検討)" 日本造船学会論文集. 117号. 582-591 (1995)

    • Related Report
      1995 Annual Research Report

URL: 

Published: 1994-04-01   Modified: 2021-09-14  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi