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1993 Fiscal Year Final Research Report Summary

Development of Dynamic Positioning System for Deep Sea Floating Structure

Research Project

Project/Area Number 04302038
Research Category

Grant-in-Aid for Co-operative Research (A)

Allocation TypeSingle-year Grants
Research Field 船舶抵抗・運動性能・計画
Research InstitutionKyusyu University

Principal Investigator

KOTERAYAMA Wataru  Kyusyu Univ, Research Institute for Applied Mechanics, Professor, 応用力学研究所, 教授 (80038562)

Co-Investigator(Kenkyū-buntansha) 井上 義行  横浜国立大学, 工学部, 教授 (60126373)
MAEDA Hisaaki  Tokyo Univ., Institute of Industrial Science, Professor, 生産技術研究所, 教授 (80013192)
KIJIMA Katsuro  Kyusyu Univ.Faculty of Engineering, Professor, 工学部, 教授 (90038042)
KYOZUKA Yusaku  Kyusyu Univ.Graduate school, Interdisciplinary Eng., Sci., Dept.Earth System Sci, 総合理工学研究科, 教授 (80177948)
OHKUSU Makoto  Kyusyu Univ, Research Institute for Applied Mechanics, Professor, 応用力学研究所, 教授 (70038537)
Project Period (FY) 1992 – 1993
KeywordsFloating structure / Slow drift oscillation / Thruster assited mooring / Dynamic Positioning & System
Research Abstract

A floating offshore platorm is useful to develop mineral resources in the ocean and a lot of platform are being operated. The directions for use requires that platforms keep the position under the external forces such as ocean current, wind or waves. Generally, mooring system or dynamic positioning system by thrusters are used to keep the potision. However, the former system can not prefectly prevent the slow drift oscillation. The latter system requires a lot of energy because the thrusters have to work continually against current or wind.
In this paper, thruster assisted mooring system is adopted. In this system, mooring is used to keep the position against the external forcde by current and wind. The thrusters are used to prevent the slow drift oscillation. The it is expected that the energy to keep the position is remarkably reduced.
Experiments and calculations to obtain hydrodynamic forces acting on a floating platform model were carried out and controller was designed. From the results of simulation of motions, it was verified that the energy is reduced.

  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] C.Hu and W.Koterayama: "A Study on Viscous Damping Forces of a Slowly Oscillating Vertical in Random Waves" Journal of The Society of Naval Architects of Japan. 174号. 205-210 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 井上 義行、薜 為一: "ARMA modelによる方向波中の変動漂流力に関するシミュレーション計算法の改良" 日本造船学会論文集. 174号. 409-416 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 吉田 尚史、斎藤 公男: "浅水域の構造物に働く長周期波浪強制力について" 日本造船学会論文集. 174号. 429-437 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 経塚 雄策、横山 和豊: "内湾の大規模海洋構造物が周辺海域に及ぼす海況変化について" 第12回海洋工学シンポジウム講演論文集. 485-492 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中村 昌彦、小寺山 亘、梶原 宏之、三田村 友弘: "係留された浮遊式海洋構造物の位置保持システムに関する研究" 第12回海洋工学シンポジウム講演論文集. 387-394 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Nakamura,W.Koterayama,H.Kajiwara,T.Mitamura: "Application of a Dymanic Positioning System to a Moored Floating Platform" Proc.of the 4th International Offshore and Polar Engineering Conference. (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] C.Hu and Wataru Koterayama: "A Numerical Study on Hydrodynamic Forces acting on an Oscillating Circular Cylinder in Hrmonic Flow" Journal of The Society of Naval Architects of Japan. Vol.174. 205-210 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshiyuki Inoue and Weiyi Xue: "An Improvement of Numerical Simulations of Slowly Varying Drift Forces in Short Crested Waves by Modified ARMA Model" Journal of The Society of Naval Architects of Japan. Vol.174. 409-416 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hisafumi Yoshida and Kimio Saito: "Second-order Long Period Wave Forces on an Offshore Structure in Shallow Water -Long Period Wave Forces on a Vertical Flat Plate-" Journal of The Society of Naval Archtects of Japan. Vol.174. 429-437 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yusaku Kyozuka and Kazutoyo Yokoyama: "Assessment of Ocean Environment by an Airport in Ariake Bay" 12th Ocean Engineering Symposium. 485-492 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masahiko Nakamura, Wataru Koterayama, Hiroyuki Kajiwara and tomohiro Mitamura: "Study on Dynamics of Thruster Assisted Mooring" 12th Ocean Engineering Symposium. 387-394 (1994)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1995-03-27  

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