Study on load identification based on information obtained from distributed sensors

• Project/Area Number: 23760779
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Naval and maritime engineering
• Research Institution: The University of Tokyo
• Principal Investigator: MURAYAMA Hideaki 東京大学, 大学院・工学系研究科, 准教授 (10361502)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 材料 / 構造力学 / 荷重同定 / 光ファイバセンサ / 分布計測 / FBG / OFDR / 逆解析 / 構造ヘルスモニタリング / ひずみ

Research Abstract

We applied invers analysis to identification of distributed loads on6-m CFRP wing structure and 1-m aluminum wind tunnel model. These structures were equipped with fiber-optic strain sensors and the applied loads were estimated based on strains measured by the sensors. Seven fiber-optic strain sensor arrays which have 30 ? 40FBGs in each were bonded on the wing in the longitudinal direction. Measured strains show excellent accuracy and the estimated load coincided with the actual one. In the wing tunnel model, the applied pressure distribution could be also estimated by several fiber-optic strain sensors which can measure strain at an arbitrary position along fibers.

Research Products

• [Journal Article] Measurement of distributed strain and deformation and load identification using optical fiber strain sensors (2011)
  • Author(s): K. Tachibana, H. Murayama, H. Igawa, T. Nakamura and J. Yokokawa
  • Journal Title: Proc. of the 8th International Workshop on Structural Health Monitoring Volume: 1 Pages: 1180-1187
  • Peer Reviewed
• [Presentation] Strain monitoring of 6-m composite wing structure by fiber-optic distributed sensing system with FBG (2012)
  • Author(s): H. Murayama, K. Tachibana, H. Igawa, Y. Hirano, Y. Aoki, K. Kageyama, K. Uzawa
  • Organizer: ECCM-15
  • Place of Presentation: Venis, Italy.
• [Presentation] 光ファイバひずみセンサを用いた翼構造体の荷重逆推定 (2012)
  • Author(s): 井川寛隆,中村俊哉,橘和希,村山英晶,横川譲,平野義鎭
  • Organizer: 第54回構造強度に関する講演会
  • Place of Presentation: 熊本
• [Presentation] Distributed strain and load monitoring of 6 m composite wing structure by FBG arrays and long-length FBGs (2012)
  • Author(s): H. Murayama, K. Tachibana, Y. Hirano, H. Igawa, K. Kageyama
  • Organizer: OFS-22
  • Place of Presentation: Beijing,China.
• [Presentation] Strain monitoring of 6-m composite wing structure by fiber-optic distributed sensing system with FBG (2012)
  • Author(s): Hideaki Murayama
  • Organizer: ECCM-15
  • Place of Presentation: ベニス、イタリア
• [Presentation] Distributed strain and load monitoring of 6 m composite wing structure by FBG arrays and long-length FBGs (2012)
  • Author(s): Hideaki Murayama
  • Organizer: OFS-22
  • Place of Presentation: 北京、中国
• [Presentation] 光ファイバひずみセンサを用いた翼構造体の荷重逆推定 (2012)
  • Author(s): 井川寛隆
  • Organizer: 第54回構造強度に関する講演会
  • Place of Presentation: 熊本市
• [Presentation] Measurement ofdistributed strain and deformation andload identification using optical fiberstrain sensors (2011)
  • Author(s): K. Tachibana, H. Murayama, H. Igawa,T. Nakamura, J. Yokokawa
  • Organizer: IWSHM2011
  • Place of Presentation: Stanford, USA.
• [Presentation] Distributed sensing with OFDR and its application to structural health monitoring (2011)
  • Author(s): Hideaki Murayama, Hirotaka Igawa, Koji Omichi and Yuichi Machijima
  • Organizer: OFS-21(招待講演)
  • Place of Presentation: Ottawa, Canada
• [Presentation] Structural health monitoring by fiber-optic distributed sensors (2011)
  • Author(s): H. Murayama
  • Organizer: US-Japan workshop on the application of fiber-optic sensing technologies to geosciences and geo-engineering
  • Place of Presentation: 東京大学