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Nonlinear wave response analysis of very large floating structures subjected to nonlinear random waves in variable water depth

Research Project

Project/Area Number 14350243
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 構造工学・地震工学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

UTSUNOMIYA Tomoaki  KYOTO UNIVERSITY, Graduate School of Engineering, Associate Professor, 工学研究科, 助教授 (10211773)

Co-Investigator(Kenkyū-buntansha) WATANABE Eiichi  KYOTO UNIVERSITY, Graduate School of Engineering, Professor, 工学研究科, 教授 (30026174)
NAGATA Kazutoshi  KYOTO UNIVERSITY, Graduate School of Engineering, Assistant Professor, 工学研究科, 助手 (40301238)
Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥12,200,000 (Direct Cost: ¥12,200,000)
Fiscal Year 2004: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2003: ¥4,400,000 (Direct Cost: ¥4,400,000)
Fiscal Year 2002: ¥5,700,000 (Direct Cost: ¥5,700,000)
KeywordsVery Large Floating Structure / Wave Response Analysis / Simulation / Hydroelectricity / Dynamic Response Analysis / Megafloat / Variable Sea Depth / Multipole Expansion / ブシネスクモデル
Research Abstract

In this research, nonlinear wave response analysis of very large floating structures subjected to nonlinear random waves in variable water depth has been investigated. The main objective is to develop a computer simulation program for accurate and efficient evaluation of wave response of a Very Large Floating Structure(VLFS) located in variable depth sea subjected to nonlinear waves.
In the fiscal year of 2002, wave-field analysis program was considered using plane 2-d model. The developed program can express the wave-propagation onto the inclined beach, and the applicability to the strong non-linear wave has been confirmed. Also, the wave diffraction analysis program around an arbitrary shape floating body in the frequency domain has been developed ; where the bichromatic waves can be considered.
In the fiscal year of 2003, the wave diffraction analysis program subjected to bichromatic and bidirectional waves has been developed, where 2^<nd> order nonlinear waves can be considered. Slow … More drift oscillation of a large pontoon including the effect of elastic deformation has been analyzed by the developed program, and it has been clarified that the conventional approximate method using constant drift force would fail, unless the second order diffraction force is considered rigorously. Also, the acceleration method for application to a very large floating structure in the computational point of view has been examined, and the accelerated program has been developed.
In the fiscal year of 2004, the wave diffraction analysis program subjected to bichromatic and bidirectional waves has been completed and extended to cover the analysis of non-linear wave run-up analysis around the floating structure. Also, in the acceleration algorithm using the multipole expansions, the convergence characteristics for iterative solver is the key point for computation time reduction ; thus, the research for modifying the iterative solver has been made, and finally, the reduction of computation time up-to 1/5 -1/10 has been obtained. Less

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (25 results)

All 2005 2004 2003 Other

All Journal Article (22 results) Publications (3 results)

  • [Journal Article] 任意海底起伏上に設置されるハイブリッド型超大型浮体に作用する定常漂流力の解析2005

    • Author(s)
      貴田勝太郎, 宇都宮智昭, 渡邊英一
    • Journal Title

      第18回海洋工学シンポジウム論文集 18

      Pages: 1-8

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 超大型浮体の波浪回折問題に対するOSP-ILUCの有効性2005

    • Author(s)
      巻幡憲俊, 宇都宮智昭, 渡邊英一
    • Journal Title

      構造工学論文集 51A

      Pages: 259-264

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Analysis of wave drift forces on a general shape VLFS floating in the open sea of variable depth2005

    • Author(s)
      S.Kida, T.Utsunomiya, E.Watanabe
    • Journal Title

      Proc.of the Ocean Engineering Symposium Vol.18

      Pages: 1-8

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Effectiveness of OSP-ILUC for wave diffraction analysis of a very large floating structure (VLFS)2005

    • Author(s)
      N.Makihata, T.Utsunomiya, E.Watanabe
    • Journal Title

      Journal of Structural Engineering, JSCE Vol.51A

      Pages: 259-264

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 任意海底起伏上に設置されるハイブリッド型超大型浮体に作用する定常漂流力の解析2005

    • Author(s)
      貴田勝太郎
    • Journal Title

      第18回海洋工学シンポジウム講演論文集 18

      Pages: 1-8

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 超大型浮体の波浪回折問題に対するOSP-ILUCの有効性2005

    • Author(s)
      巻幡憲俊
    • Journal Title

      構造工学論文集 51A(発表予定)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 超大型浮体の波浪応答解析へのGMRES-DRの適用2004

    • Author(s)
      巻幡憲俊, 宇都宮智昭, 渡邊英一
    • Journal Title

      構造工学論文集 50A

      Pages: 179-185

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 波浪回折問題のための境界要素法へのILUCの適用2004

    • Author(s)
      巻幡憲俊, 宇都宮智昭, 渡邊英一
    • Journal Title

      応用力学論文集 7

      Pages: 279-286

    • NAID

      130004091583

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 弾性変形を考慮したポンツーン型浮体に作用する変動波漂流力の解析2004

    • Author(s)
      貴田勝太郎, 宇都宮智昭, 渡邊英一
    • Journal Title

      応用力学論文集 7

      Pages: 1291-1301

    • NAID

      130004091561

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Application of the GMRES with deflated restarting (GMRES-DR) to wave response analysis of a very large floating structure (VLFS)2004

    • Author(s)
      N.Makihata, T.Utsunomiya, E.Watanabe
    • Journal Title

      Journal of Structural Engineering, JSCE Vol.50A

      Pages: 179-185

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Application of the Crout version of the incomplete LU factorization (ILUC) to the boundary element analysis for wave diffraction problems2004

    • Author(s)
      N.Makihata, T.Utsunomiya, E.Watanabe
    • Journal Title

      Journal of Applied Mechanics, JSCE Vol.7

      Pages: 279-286

    • NAID

      130004091583

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Analysis of slowly-varying wave drift force on a pontoon type VLFS2004

    • Author(s)
      S.Kida, T.Utsunomiya, E.Watanabe
    • Journal Title

      Journal of Applied Mechanics, JSCE Vol.7

      Pages: 1291-1301

    • NAID

      130004091561

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 超大型浮体の波浪応答解析へのGMRES-DRの適用2004

    • Author(s)
      巻幡憲俊
    • Journal Title

      構造工学論文集 50A

      Pages: 179-185

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 波浪回折問題のための境界要素法へのILUCの適用2004

    • Author(s)
      巻幡憲俊
    • Journal Title

      応用力学論文集 7

      Pages: 279-286

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 弾性変形を考慮したポンツーン型浮体に作用する変動波漂流力の解析2004

    • Author(s)
      貴田勝太郎
    • Journal Title

      応用力学論文集 7

      Pages: 1291-1301

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 任意形状浮身体に作用する2次回折波力の高精度計算プログラムの開発2003

    • Author(s)
      渡邊英一, 宇都宮智昭, 佐藤宏樹
    • Journal Title

      第17回海洋工学シンポジウム論文集 17

      Pages: 305-312

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 高速化グリーン関数法への局所展開導入による計算速度向上について2003

    • Author(s)
      渡邊英一, 宇都宮智昭, 吉澤 直
    • Journal Title

      第17回海洋工学シンポジウム論文集 17

      Pages: 313-319

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 波浪回折問題のための境界要素法へのGMRES-IRの適用2003

    • Author(s)
      巻幡憲俊, 宇都宮智昭, 渡邊英一
    • Journal Title

      応用力学論文集 6

      Pages: 275-281

    • NAID

      80016259458

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Development of numerical analysis program for second order diffraction wave forces acting on floating bodies of arbitrary shape2003

    • Author(s)
      E.Watanabe, T.Utsunomiya, H.Satoh
    • Journal Title

      Proc.of the Ocean Engineering Symposium Vol.17

      Pages: 305-312

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Improvement of computation time by introduction of local expansions in accelerated Green's function method2003

    • Author(s)
      E.Watanabe, T.Utsunomiya, N.Yoshizawa
    • Journal Title

      Proc.17^<th> Ocean Engineering Symposium Vol.17

      Pages: 313-319

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Application of the implicitly restarting GMRES (GMRES-IR) to the boundary element analysis for wave diffraction problems2003

    • Author(s)
      N.Makihata, T.Utsunomiya, E.Watanabe
    • Journal Title

      Journal of Applied Mechanics, JSCE Vol.6

      Pages: 275-281

    • NAID

      130004091429

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 波浪回折問題のための境界要素法へのGMRES-IRの適用2003

    • Author(s)
      巻幡憲俊
    • Journal Title

      応用力学論文集 6

      Pages: 275-281

    • Related Report
      2004 Annual Research Report
  • [Publications] 渡邊 英一: "任意形状浮体に作用する2次回折波力の高精度計算プログラムの開発"第17回海洋工学シンポジウム論文集. 305-312 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 渡邊 英一: "高速化グリーン関数法への局所展開導入による計算速度向上について"第17回海洋工学シンポジウム論文集. 313-319 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 渡邊 英一: "任意形状浮体に作用する2次オーダー回折波力の高精度計算プログラムの開発"第17回海洋工学シンポジウム論文集. (発表予定). (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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