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On Hydroelastic Behavior of Very Large Floating Structures for Ocean Space Utilization

Research Project

Project/Area Number 09450205
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Building structures/materials
Research InstitutionNagoya University

Principal Investigator

MATSUI Tetsuya  Nagoya Univ., Gr. School of Engng., Prof., 工学研究科, 教授 (70023083)

Co-Investigator(Kenkyū-buntansha) KATO Kenji  Toyota Nat. Inst. of Tech., Prof., 教授 (80043206)
YAMAGUCHI Masakuni  Nagoya Univ., Gr. School of Engng., Assist., 工学研究科, 助手 (40283395)
OHMORI Hiroshi  Nagoya Univ., Gr. School of Engng., Assoc. Prof., 工学研究科, 助教授 (90092387)
YAMADA Kouji  Toyota, Nat., Inst. of Tech., Lecturer, 講師 (60273281)
HAGIWARA Nobuyuki  Daido Inst. of Tech., Lecturer, 講師 (30240807)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥10,500,000 (Direct Cost: ¥10,500,000)
Fiscal Year 1999: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1998: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1997: ¥7,300,000 (Direct Cost: ¥7,300,000)
Keywordsfloating offshore structure / wave / fluid force / motion response / elastic response / integral equation method / 流れ
Research Abstract

Theoretical and experimental studies have been performed to predict the hydroelastic behavior of a very large floating offshore structures (VLFS) in waves. The results of the project are summarized as follows :
1. A computer program has been developed to predict the wave-induced hydroelastic response of a VLFS by combined use of a dry-mode expansion technique and the hybrid integral-equation method.
2. Model tests have been conducted to measure the hydroelastic response of a VLFS model in a regular wave tank. The model is composed of a number of aluminum plates attached to a slitted polyethylene block to provide buoyancy. In addition to the models with different bending stiffnesses and masses, a VLFS model with a vertical wall or a horizontal submerged plates at the wave-front edge were tested to investigate the possibility of reducing the large deflection near the edge zone of the VLFS. The following conclusions were derived from the series of tests.
(a) The motion response of the VLFS model is characterized by the higher-order elastic modes. With increasing the wave frequency, the response amplitudes are reduced drastically except near the wave-front edge where the large deflection is observed.
(b) Attaching the vertical wall or the horizontal submerged plates at the wave-front edge has the effect of reducing the large deflection at the edge zone. Its effect is more pronounced with increasing the wave frequency. When the length of the VLFS exceeds five times the wave length, the response is reduced to about 2/3 to 1/2 with attaching the edge plates whose length is comparable with the draft.
(c) Satisfactory agreement is observed between theoretical and experimental predictions, confirming the validity of the proposed analytical method.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] Matsui, T. et al.: "Wave Forces on Large Axisymmetric Floating Bodies in Weak Current"Proc. 16th Int. Conf. on Offshore Mechanics and Arctic Engineering, Yokohama. Vol.I-A. 39-46 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 金徳印ほか: "TLP係留索の疲労損傷への2次波浪外力の寄与について"日本建築学会構造系論文集. 第521号. 177-184 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 森部康司ほか: "大型浮遊式平板状構造物の波浪応答に関する計測実験(その1:理論値との比較について)"日本建築学会大会学術講演梗概集(中国). A-2. 349-350 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 羅鎔浩ほか: "大型浮遊式平板状構造物の波浪応答に関する計測実験(その2:端板の付設による応答制御効果について)"日本建築学会大会学術講演梗概集(中国). A-2. 351-352 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 金徳印ほか: "TLP係留索の疲労損傷への2次波浪外力の寄与について-レインフロー法による時間領域解析-"日本建築学会東海支部研究報告集. 第38号. 293-296 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 羅鎔浩ほか: "端板の付設による大型浮体構造物の波浪応答応答低減効果に関する計測実験"日本建築学会東海支部研究報告集. 第38号. 297-300 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Matsui, T. et al.: "Wave Forces on Large Axisymmetric Floating Bodies in Weak Current"Proc. 16th Int. Conf. on Offshore and Arctic Engng., Yokohama. Vol. I-A. 39-46 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Jin, D. et al.: "On the Contribution of Second-Order Sum-Frequency Wave Loads to Fatigue Damage of TLP Tendons"J of Struct. and Construct. Engng., Trans. AIJ. No.521. 177-184 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Moribe, Y. et al.: "An Experimental Study on Wave Response of a Large Floating Plate-Type Structure, Part 1 : Comparison with Analytical Prediction"Summaries of Technical Papers of Annual Meeting, AIJ. Vol.A-2. 349-350 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Rha, Y. et al.: "An Experimental Study on Wave Response of a Large Floating Plate-Type Structure, Part 2 : Reducing Effect on Wave Response with a Skirt"Summaries of Technical Papers of Annual Meeting, AIJ. Vol.A-2. 351-352 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Jin, D. et al.: "On the Contribution of Second-Order Sum-Frequency Wave Loads to Fatigue Damage of TLP Tendons -Time-Domain Analysis by the Rainflow Method-"AIJ Tokai Chapter Architectural Meeting. No.38. 293-296 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Rha, Y. et al.: "An Experimental Study on Wave-Induced Response of Large Floating Structure with Submerged Edge Plates"AIJ Tokai Chapter Architectural Meeting. No.38. 297-300 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 金徳印ほか: "TLP係留索の疲労損傷への2次波浪外力の寄与について"日本建築学会構造系論文集. 第521号. 177-184 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 森部康司ほか: "大型浮遊式平板状構造物の波浪応答に関する計測実験(その1:理論値との比較について)"日本建築学会大会学術講演梗概集(中国). A-2. 349-350 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 羅鎔浩ほか: "大型浮遊式平板状構造物の波浪応答に関する計測実験(その2:端板の付設による応答制御効果について)"日本建築学会大会学術講演梗概集(中国). A-2. 351-352 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 金徳印ほか: "TLP係留索の疲労損傷への2次波浪外力の寄与について-レインフロー法による時間領域解析-"日本建築学会東海支部研究報告集. 第38号. 293-296 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 羅鎔浩ほか: "端板の付設による大型浮体構造物の波浪応答応答低減効果に関する計測実験"日本建築学会東海支部研究報告集. 第38号. 297-300 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 金徳印ほか: "TLP係留索の疲労損傷への2次波浪外力の寄与について" 日本建築学会構造系論文集. 第521号(掲載決定). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Matsui, T.et al.: "Wave Forces on Large Axisymmetric Floating Bodies in Weak Current" Proc.16th Int.Conf.on Offshore Mechanics and Arctic Engineering, Yokohama. Vol.I-A. 39-46 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kato, K.et al.: "Comparative Study on the Motion Characteristics of Different Types of Floating Offshore Structures" Proc.16th Int.Conf.on Offshore Mechanics and Arctic Engineering, Yokohama. Vol.I-A. 195-202 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Jin, D.et al.: "Stochastic Response Analysis of Jacket-type Ocean Platforms under Simultaneously Acting Waves and Earthquakes" Proc.16th Int.Conf.on Offshore Mechanics and Arctic Engineering, Yokohama. Vol.II. 297-302 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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