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RESEARCH ON CAPSIZING MECHANISM OF FLOATING STRUCTURES IN COMBINED ENVIRONMENTAL CONDITIONS

Research Project

Project/Area Number 02452185
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 船舶抵抗・運動性能・計画
Research InstitutionUNIVERSITY OF TOKYO

Principal Investigator

MAEDA Hisaaki  UNIVERSITY OF TOKYO, INSTITUTE OF INDUSTRIAL SCIENCE, PROFESSOR, 生産技術研究所, 教授 (80013192)

Co-Investigator(Kenkyū-buntansha) KINOSHITA Takeshi  UNIVERSITY OF TOKYO, INSTITUTE OF INDUSTRIAL SCIENCE, ASSOCIATE PROFESSOR, 生産技術研究所, 助教授 (70107366)
Project Period (FY) 1990 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥6,400,000 (Direct Cost: ¥6,400,000)
Fiscal Year 1992: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1991: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1990: ¥4,100,000 (Direct Cost: ¥4,100,000)
KeywordsSemi-Submersible / Stability / Safety / Capsizing / Combined Environmental Forces / Life Raft / Wind, Wave, Current / Multi-Directional Waves / セミサブリング
Research Abstract

International Maritime Organization (IMO) considered to develop a safety regulation which covers a life raft with sea-anchor, since serious fatality has occured on capsizing of large floating structures or life rafts in combined environmental conditions, such as waves, wind and current. In fact this kind of regulation is discussed without any deep insight of mechanism of capsizing. IMO guarantees the safety of large floating structures considering some margins for reserved buoyancy or taking account of full scale test of life rafts in real severe sea conditions. If the mechanism of capsizing of these floating bodies is made clear, it is possible to evaluate the absolute safety of these floating bodies in severe sea conditions, and we can develop reasonable countermeasures for capsizing of floating bodies.
In this project we developed an equation of capsize of floating bodies, and completed the computer code of behavior of floating bodies in time domain in which we take account of mutli-directional waves, line structures such as risers, second order wave excitations and nonlinear hydrodynamic forces derived from separated flow.. Finally we proposed the evaluation method of safety of life raft with sea anchor in which we pointed out the importance of wind lift force that is dominant force for capsizing.

Report

(4 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • 1990 Annual Research Report
  • Research Products

    (34 results)

All Other

All Publications (34 results)

  • [Publications] H.Maeda,H.J.Jo,S.Miyajima: "Behavior of a Floating Body in Multi-Directional Waves" UJNE/MFP,NOAA. 4.1-17 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 宮島 省吾,趙 孝済,前田 久明: "多方向海洋波中の浮体の挙動" 生産研究、東大生研. 44. 421-424 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 前田 久明: "浮遊式海洋構造物の研究の現状(その2)" 生産研究 東大生研. 44. 403-410 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 前田 久明: "浮遊式海洋構造物の研究の現状(その1)" 生産研究 東大生研. 44. 395-402 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 前田 久明,山崎 知巳: "海洋構造物の安全性評価" 第11回海洋工学シンポジウム 日本造船学会. 231-238 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] H.Maeda,H.J.Jo,S.Miyajima: "EFFECTS OF DIRECTIONAL WAVES ON THE LOW-FREQUENCY MOTIONS OF MOORED FLOATING STRUCTURES" ISOPE'92. 3. 489-495 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 小山 健夫,藤野 正隆,前田 久明: "成山堂" 船体と海洋構造物の運動学(改訂版), 1-362 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] H. Maeda, H.J. Jo, S. Miyajima: "Behavior of a Floating Body in Multi-Directional Waves" UJNR/MFP, NOAA. 4,1-17 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] S. Miyajima, H.J. Jo, H. Maeda: "The Behavior of Floating Body in Multi-Directional Waves" SEISAN-KENKYU, IIS, UNIV. OF TOKYO.44,9. 421-424 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] H. Maeda: "State of the Arts on Research of Dynamics of Moored Floating Offshore Structures(Part 2)" SEISAN-KENKYU, IIS, UNIV. OF TOKYO.44,9. 403-410 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] H. Maeda: "State of the Arts on Research of Dynamics of Moored Floating Offshore Structures(Part 1)" SEISAN-KENKYU, IIS, UNIV. OF TOKYO.44,9. 395-402 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] H. Maeda, T. Yamazaki: "Safety Assessment of Offshore Structures" Proceedings of 11th Ocean Engineering Symposium, SOCIETY OF NAVAL ARCHITECTS OF JAPAN. 231-238 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] H. Maeda, H.J. Jo, S. Miyajima: "EFFECTS OF DIRECTIONAL WAVES ON THE LOW-FREQUENCY MOTIONS OF MOORED FLOATING STRUCTURES" ISOPE'92. 3. 489-495 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T. Koyama, M. Hujino, H. Maeda: Seizan-do. Dynamics of Ships and Offshore Structures,

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] H.Maeda,H.J.Jo,S.Miyajima: "Behavior of a Floating Body in Multi-Directional Waves" UJNR/MFP,NOAA. 4.1-17 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 宮島 省吾、趙 孝済 前田 久明: "多方向海洋波中の浮体の挙動" 生産研究、東大生研. 44. 421-424 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 前田 久明: "浮遊式海洋構造物の研究の現状(その2)" 生産研究 東大生研. 44. 403-410 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 前田 久明: "浮遊式海洋構造物の研究の現状(その1)" 生産研究 東大生研. 44. 395-402 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 前田 久明,山崎 知巳: "海洋構造物の安全性評価" 第11回海洋工学シンポジウム 日本造船学会. 231-238 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] H.Maeda,H.J.Jo S.Miyajima: "EFFECTS OF DIRECTIONAL WAVES ON THE LOW-FREQUENCY MOTIONS OF MOORED FLOATING STRUCTURES" ISOPE'92. 3. 489-495 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 小山 健夫、藤野 正隆 前田 久明: "船体と海洋構造物の運動学(改訂版)" 成山堂, 1-362 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 前田 久明,趙 孝済、宮島 省吾: "方向波が半潜水式海洋構造物の安全性に及ぼす影響" 日本造船学会第10回海洋工学シンポジウム. 229-236 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Zhi Yu,H.Maeda: "On the Modeling of an OWC Wave Power System" 関西造船協会誌. 215. 123-128 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 笠原 昭夫,前田 久明 他: "2次元人工不規則水波の発生法と解析法(第三報)" 関西造船協会誌. 216. 93-99 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 前田 久明,宮島 省吾 他: "取水管付き係留浮体の挙動に関する研究" 日本造船学会論文集. 170. 345-358 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] H.Maeda: "Modelling techniques for dynamics of ships" Phil.Trans.R.Soc.334. 307-317 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 前田 久明、山崎 知巳: "海洋構造物の安全性評価ー事故プロセスのコントロ-ルによる最適な安全対策の意志決定法" 日本造船学会第11回海洋工学シンポジウム. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 前田 久明 他: "海中技術一般" 成山堂, 308 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 前田 久明,増田 光一,丸山 文生,北小路 結花: "波と流れの共存場における水平角柱まわりの剥離流れについて" 日本造船学会論文集. 168. 195-204 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 前田 久明,趙 孝済,宮島 省吾: "方向波中での半潜水式海洋構造物の安全性に関する考察" 関西造船協会講演論文集. 77-79 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 笠原 昭夫,前田 久明,増田 光一,吉野 博之: "2次元人工不規則水波の発生法と解析法(その3)" 関西造船協会講演論文集. 51-52 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Zhi Yu,H.Maeda: "On the Modeling of a OWC Wave Power System" 関西造船協会講演論文集. 53-54 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] H.Maeda,T.Yokoyama,H.Makita,S.Miyajima: "Preadiaction Method for Resistance and Inaclinations of a Floating Type NetーCage Mooring by a Single Line in Current" Proceedings of the Fourth Pacific Congress on Marine Science and Technology. Vol.1. 362-369 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Z.Yu,S.Miyajima et al: "Simulation and Operating Optimization of an OWC Wave Energy System with the Wells Turbine Considered" Proceedings of 10th Ocean Engineering Symposium. 253-260 (1991)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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