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2002 Fiscal Year Final Research Report Summary

Numerical Simulations for Highly Nonlinear Behavior of a Ship in Large-Amplitude Waves

Research Project

Project/Area Number 12450403
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 船舶工学
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

KASHIWAGI Masashi  Kyushu University, Res. Inst. For Appl. Mech., Professor, 応用力学研究所, 教授 (00161026)

Co-Investigator(Kenkyū-buntansha) IWASHITA Hidetsugu  Hiroshima University, Faculty of Engineering, Assoc. Professor, 工学研究科, 助教授 (60223393)
KYOZUKA Yusaku  Kyushu University, Interdisciplinary Graduate School, Professor, 総合理工学研究所, 教授 (80177948)
HU Chunghong  , 助教授 (20274532)
TAKAGI Ken  Osaka University, Faculty of Engineering, Assoc. Professor, 工学研究科, 助教授 (90183433)
Project Period (FY) 2000 – 2002
KeywordsNonlinear problems / Computational Fluid Dynamics / CIP method / Wave breaking / Wave impact / Time - domain problem / Large-amplitude motion / Added resistance in waves
Research Abstract

(1) A numerical calculation program was developed for simulating the multi-phase flow with gas, liquid and solid. This program is based on the CIP-CUP method, which is featured in less numerical diffusion and being capable of solving the compressible and incompressible fluids simultaneously with the same equations. The wave impact problem was studied as a check of the program and we found the program very versatile even for the breaker and splash occurring.
(2) Comparison between numerical results and corresponding experiments was made for the impulsive pressure and resultant force acting on a platform fixed above the still water due to a large-amplitude soliton wave. Good agreement was confirmed not only for this case but also for complicated interactions between the green water coming onto the deck of a L-shaped structure and the reflected waves on the deck.
(3) A numerical wave tank was established, with a plunger-type or flap-type wavemaker installed and the numerical absorbing beach to prevent the wave reflection. Then numerical simulations were performed in this numerical wave tank for the nonlinear motions of a floating body caused by large-amplitude waves. It was confirmed that the drift force and impulsive wave force were successfully computed and the computations were very versatile.
(4) By means of the 3-D time-domain Green function method, the so-called body nonlinear calculation method was studied. The wave-induced motion and the added resistance in waves were successfully predicted even for an actual ship with flare near the bow, which was found to be in good agreement with experiments.

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 柏木 正: "船舶海洋流体力学の数値的解法の現状と課題"日本流体力学会年会2001講演会. 291-292 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 柏木 正: "浮体運動学の数理"日本応用数理学会「応用数理」. Vol.11,No.3. 2-12 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 片岡史朗, 岩下英嗣: "非定常波動場に及ぼす船体非線形影響に関する研究"西部造船会会報. 第103号. 123-134 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 胡 長洪, 柏木 正, 桃木 勉: "CIP法を用いた波浪構造物衝撃現象の数値解析"第15回計算力学講演会講演論文集. 433-434 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Momoki, M.Kashiwagi, C.Hu: "CFD Simulations of Nonlinear Waves and Interactions with a Structure"Proceedings of Techno-Ocean 2002 International Conference. (CD-Rom). T-H-2 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 桃木 勉, 柏木 正, 胡 長洪: "水波と海洋構造物の強非線形相互作用に関する数値計算法"西部造船会会報. 第107号(印刷中). (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Kashiwagi(Editor): "Hydrodynamics in Ship and Ocean Engineering"Research Institute for Applied Mechanics, Kyushu University. 421 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kashiwagi, M.: "State of the Art and Future Work in Numerical Marine Hydrodynamics"Proc. of 2001 Annual Meeting of Japan Society of Fluid Mechanics. 291-292 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kashiwagi, M.: "Theories of Floating-Body Dynamics"Bulletin of the Japan Society for Industrial and Applied Mathematics. Vol.11, No.3. 2-12 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kataoka, S., Sueyoshi, A., Arihama, K., Iwashita, H. and Takaki. M.: "A Study on Body Nonlinear Effects in the Unsteady Wave Field"Bulletin of West-Japan Society of Naval Architects. Vol.103. 123-134 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hu Changhong, Kashiwagi, M., Momoki, T.: "Numerical Study on Interaction of Waves with Structures by CIP Method"Proc. of 15th Computational Mechanics Conference (Kagoshima). 433-434 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Momoki, T., Kashiwagi, M. and Hu C.: "CFD Simulations ofNonlinear Waves and Interactions with a Structure"Proceedings of Techno-Ocean 2002 International Conference. CD-ROM(PaperNo. T-H-2). (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Momoki, T., Kashiwagi. M. and Hu C.: "Numerical Simulations of Highly Nonlinear Interactions of Water Waves with an Offshore Structure"Bulletin of West-Japan Society of Naval Architects. Vol.107(in press). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Kashiwagi.: "Hydrodynamics in Ship and Ocean Engineering."1-421 (2001)

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

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Published: 2004-04-14  

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