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Research on the analysis of hydro-elastic behavior of a very large mobile offshore structure in waves and its anti-motion

Research Project

Project/Area Number 16360436
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Naval and maritime engineering
Research InstitutionOsaka University

Principal Investigator

TAKAGI Ken  Osaka University, Graduate School of Engineering, Associate Professor, 大学院工学研究科, 助教授 (90183433)

Co-Investigator(Kenkyū-buntansha) NAITO Shigeru  Osaka University, Graduate School of Engineering, Professor, 大学院工学研究科, 教授 (20093437)
NOZAWA Kazuo  Osaka University, Graduate School of Engineering, Assistant Professor, 大学院工学研究科, 講師 (10304023)
KAWASAKI Zenichiro  Osaka University, Graduate School of Engineering, Professor, 大学院工学研究科, 教授 (60126852)
MINOURA Munehiko  Osaka University, Graduate School of Engineering, Research Associate, 大学院工学研究科, 助手 (30294044)
Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥10,300,000 (Direct Cost: ¥10,300,000)
Fiscal Year 2006: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2005: ¥4,900,000 (Direct Cost: ¥4,900,000)
Fiscal Year 2004: ¥2,600,000 (Direct Cost: ¥2,600,000)
KeywordsHydroelasticity / Offshore Wind Power Generation / Sailing Type / Mooringless / Renewable Energy / Ocean Energy / 洋上風力 / 超大型移動式浮体 / 流力弾性応答 / 線状構造物 / Precorrected FFT / FEM-Panel Method / 位置保持
Research Abstract

The following 3 topics have been mainly studied.
1.Developement of a computer code for the analysis of hydrodynamic behavior
Review of the hydroelastic theory for a very large mobile offshore structure and the development of a computer code have been carried out. This code uses the p-FFT method, which enables to handle dozens of elastic modes with about 100,000 hydrodynamic panels in a practical CPU time. In addition, in order to simplify the input and output of the structural data and elastic modes computation, the combination of MSC NASTRAN and MSC PATRAN, which are popular commercial codes, is used. The interface between these commercial codes and the hydrodynamic code also has been developed. From the theoretical aspect, the code features that the consistency between the structural discretization and the hydrodynamic discretization is maintained so that the energy conservation between the wave making damping and the modal damping is satisfied.
2.Validation of the computer code
A detailed convergence test of the code has been carried out and it is find that the code has enough convergence to carry out the computation of full scale structure. The effect of viscous damping has been investigated with the experimental data of the viscous damping. Comparisons between the numerical results and experimental data by NIES have been carried out, and it is confirmed that the numerical results have enough accuracy.
3.Establishment of the analysis of the very large mobile offshore structure
Summarizing overall results a concept of VLMOS has been presented. Using this concept for the simulation of navigation and electric power generation has been carried out. Through the simulation, it is confirmed that the methodology developed in this research is valid for conceptual design of VLMOS.

Report

(4 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (26 results)

All 2006 2005

All Journal Article (26 results)

  • [Journal Article] Hydroelastic Motion and Drift Force of Twin-hull Very Large Mobile Offshore Structure2006

    • Author(s)
      Takagi, K.
    • Journal Title

      21st IWWWFB, Loughborough, UK CD-R

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Hydro-Elastic Behavior and Drift Force of a Very Large Mobile Offshore Structure in Waves2006

    • Author(s)
      Takagi, K., Noguchi, J.
    • Journal Title

      Hydoroelastucuty in Marine Technology, (Edit. by YS Wu and WC Cui)

      Pages: 215-224

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Oputimum Route Decision of VLMOS for Renewable Energy Using Genetic Algorithm2006

    • Author(s)
      Takezawa, O., Takagi, K., Funaki, T., Kawasaki, Z.
    • Journal Title

      Techno-Ocean'06/19th JASNAOE Ocean Engineering Symposium, Kobe CD-R

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 長大弾性浮体の斜波中弾性挙動に関する一考察2006

    • Author(s)
      高木健
    • Journal Title

      平成18年日本船舶海洋工学会講演論文集

      Pages: 223-224

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Hydrodynamic forces on a two-dimensional multihull structure in waves : application of the scattering matrix theory2006

    • Author(s)
      Takagi, K.
    • Journal Title

      J. of Marine Science and Technology Vol. 11, No. 2

      Pages: 100-110

    • NAID

      10019277681

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] A pFFT-FE coupling for hydroelastic analysis of floating flexible structures in waves2006

    • Author(s)
      Takagi, K., Noguchi, J.
    • Journal Title

      Applied Ocean Research Vol.28

      Pages: 223-233

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Hydroelastic Motion and Drift Force of Twin-hull Very Large Mobile Offshore Structure2006

    • Author(s)
      Takagi, K.
    • Journal Title

      21st IWWWFB (Loughborough, UK) (CD-R)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Hydro-Elastic Behavior and Drift Force of a Very Large Mobile Offshore Structure in Waves2006

    • Author(s)
      Takagi, K., Noguchi, J.
    • Journal Title

      Hydoroelastucuty in Marine Technology (Edit. by YS Wu and WC Cui)

      Pages: 215-224

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Optimum Route Decision of VLMOS for Renewable Energy Using Genetic Algorithm2006

    • Author(s)
      Takezawa, O., Takagi, K, Funaki, T., Kawasaki, Z.
    • Journal Title

      Techno-Ocean'06/19th JASNAOE Ocean Engineering Symposium, Kobe (CD-R)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] A Consideration on the hydrodynamic behavior on a long flexible structure in oblique waves2006

    • Author(s)
      Takagi, K.
    • Journal Title

      Proc. of the JASNOE Autumn Meeting

      Pages: 223-224

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Hydrodynamic forces on a two-dimensional multihull structure in waves : application of the scattering matrix theory2006

    • Author(s)
      Takagi, K.
    • Journal Title

      J. of Marine Science and Technology Vol.11, No.2

      Pages: 100-110

    • NAID

      10019277681

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Hydroelastic Motion and Drift Force of Twin-hull Very Large Mobile Offshore Structure2006

    • Author(s)
      Talagi, K.
    • Journal Title

      21st IWWWFB, Loughborough, UK

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Hydro-Elastic Behavior and Drift Force of a Very Large Mobile Offshore Structure in Waves2006

    • Author(s)
      Takagi, K., Noguch J.
    • Journal Title

      Hydoroelastucuty in Marine Technology, Edit. by YS Wu and WC Cui

      Pages: 215-224

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Oputimum Route Decision of VLMOS for Renewable Energy Using Genetic Algorithm2006

    • Author(s)
      Takezawa, 0., Takagi, K., Funaki, T., Kawasakai, Z.
    • Journal Title

      Techno-Ocean'06/19th JASNAOE Ocean Engineering Symposium, Kobe

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Hydrodynamic forces on a two-dimensional multihull structure in waves : application of the scattering matrix theory2006

    • Author(s)
      Takagi, K.
    • Journal Title

      J. of Marine Science and Technology Vol. 11, No. 2,

      Pages: 100-110

    • NAID

      10019277681

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Hydro-elastic motions and drift forces of Very Large Mobile Offshore Structure in waves2005

    • Author(s)
      Takagi, Kinoshita, Noguchi
    • Journal Title

      Int. J. of Offshore and Polar Engineering Vol. 15, No. 3

      Pages: 183-188

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] PFFT-NASTRAN Coupling for Hydroelastic Problem of VLMOS in Waves2005

    • Author(s)
      Takagi, K., Noguchi, J.
    • Journal Title

      Proc. of 20th IWWWFB, Spitsbergen, Norway CD-R

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Application of the Scattering Matrix Theory to the Hydrodynamic Forces on a Multi-Hull Structure in Waves2005

    • Author(s)
      Takagi, K.
    • Journal Title

      Proc. of OCEANS 2005 IEEE/OES MTS, Washington DC CD-R

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Hydro-elastic motions and drift forces of Very Large Mobile Offshore Structure in waves2005

    • Author(s)
      Takagi, K, Kinoshita, T., Noguchi, J.
    • Journal Title

      Int.J. of Offshore and Polar Engineering Vol.15, No.3

      Pages: 183-188

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] PFFT-NASTRAN Coupling for Hydroelastic Problem of VLMOS in Waves2005

    • Author(s)
      Takagi, K., Noguchi, J.
    • Journal Title

      Proc. of 20th IWWWFB (Spitsbergen, Norway) (CD-R)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Application of the Scattering Matrix Theory to the Hydrodynamic Forces on a Multi-Hull Structure in Waves2005

    • Author(s)
      Takagi, K.
    • Journal Title

      Proc. of OCEANS 2005 IEEE/OES MTS, Washington DC (CD-R)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Hydroelastic Motions and Drift Forces of Very Large Mobile Offshore Structure in Waves2005

    • Author(s)
      Takagi, K., Noguchi, J., Kinoshita, T.
    • Journal Title

      Int.J.of Offshore and Polar Engineering Vol.15,No.3

      Pages: 183-188

    • Related Report
      2005 Annual Research Report
  • [Journal Article] PFFT-NASTRAN Coupling for Hydroelastic Problem of VLMOS in Waves2005

    • Author(s)
      Takagi, K., Noguchi, J.
    • Journal Title

      Proc.of 20th IWWWFB, Spitbergen, Norway (CD-R)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Application of the Scattering Matrix Theory to the Hydrodynamic Forces on a Multi-Hull Structure in Waves2005

    • Author(s)
      Takagi, K.
    • Journal Title

      Proc.of OCEANS 2005 IEEE/OES MTS, Washington DC (CD-R)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Hydro-elastic motions and drift forces of Very Large Mobile Offshore Structure in waves2005

    • Author(s)
      Takagi, Kinoshita, Noguchi
    • Journal Title

      Proc.of the 15th ISOPE, Seoul, Korea (発表予定)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] PFFT-NASTRAN Coupling for the Hydroelastic Problem of VLMOS in Waves2005

    • Author(s)
      Takagi, K, Noguchi, J
    • Journal Title

      Proc.of the 20th IWWWFB, longyearbyen (発表予定)

    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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