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2001 Fiscal Year Final Research Report Summary

STUDY ON ACCELERATED BOUNDARY ELEMENT METHOD FOR WAVE RESPONSE ANALYSIS OF VERY LARGE FLOATING STRUCTURES

Research Project

Project/Area Number 12450185
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

WATANABE Eiichi  Kyoto Univ., Dept.of Civil Engineering, Professor, 工学研究科, 教授 (30026174)

Co-Investigator(Kenkyū-buntansha) NAGATA Kazutoshi  Kyoto Univ., Dept.of Civil Engineering, Research Assoc., 工学研究科, 助手 (40301238)
UTSUNOMIYA Tomoaki  Kyoto Univ., Dept.of Civil Engineering, Assoc. Prof., 工学研究科, 助教授 (10211773)
NISHIMURA Naoshi  Kyoto Univ., Dept.of Civil Engineering, Assoc. Prof., 工学研究科, 助教授 (90127118)
Project Period (FY) 2000 – 2001
Keywordsvery large floating structure / VLFS / wave response / boundary element method / BEM / fast multipole method / FMM / hydroelasticity
Research Abstract

This study concerns on large scale computation for wave response analysis of very large floating structures (VLFS). Especially, the study presents an accelerated Green's function method for wave response analysis of Very Large Floating Structures (VLFS). The Fast Multipole Method (FMM) has been implemented on the higher order boundary element code using 8-node quadrilateral element.
The method utilizes an iterative solver, multipole expansion of Green's function, and hierarchical algorithm using auadrant-tree. For solving hydroelastic problem efficiently using iterative solver, a new algorithm has been introduced. The numerical benchmark calculations have shown the efficiency of the method both in storage requirement of 0(N) and computation time of 0(Nlog(N)), where N is the number of unknowns for the velocity potential.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] T.Utsunomiya, E.Watanabe, N.Nishimura: "Fast Multipole Method for Hydrodynamic Analysis of Very Large Floating Structures"Proc. of 16th Int. Workshop on Water Waves and Floating Bodies. 161-164 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Utsunomiya, E.Watanabe, N.Nishimura: "Fast Multipole Algorithm for Wave Diffraction/Radiation Problems and Its Application to VLFS in Variable Water Depth and Topography"Proc. of 20th Int.Conf. on Offshore Mechanics and Arctic Eng.. Paper No.5202. (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 宇都宮智昭, 渡邊英一: "超大型浮体の波浪応答解析のための高速化グリーン関数法の開発"第16回海洋工学シンポジウム論文集. 313-320 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 西村 直志, 吉田 研一: "境界積分方程式法による水の波の数値計算における放射条件の取り扱いについて"計算数理工学論文集. 1. 29-32 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Utsunomiya, E. Watanabe, N. Nishimura: "Fast Multipole Method for Hydrodynamic Analysis of Very Large Floating Structures"Proc. of 16th Int. Workshop on Water Waves and Floating Bodies. 161-164 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Utsunomiya, E. Watanabe, N. Nishimura: "Fast Multipole Algorithm for Wave Diffraction/Radiation Problems and Its Application to VLFS in Variable Water Depth and Topography"Proc. of 20th Int. Conf. on Offshore Mechanics and Arctic Eng.. Paper No. 5202. (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Utsunomiya, E. Watanabe: "Accelerated Green's Function Method for Wave Response Analysis of Very Large Floating Structures"Proc. 16th Ocean Engineering Symposium. SNAJ. 313-320 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N. Nishimura, K. Yoshida: "A Treatment of the Radiation Condition in the BIE Solution of Water Wave Problems"Proc. CTEC Conference, JASCOME. Vol.1. 29-32 (2001)

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

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Published: 2003-09-17  

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