2001 Fiscal Year Final Research Report Summary
STUDY ON ACCELERATED BOUNDARY ELEMENT METHOD FOR WAVE RESPONSE ANALYSIS OF VERY LARGE FLOATING STRUCTURES
| Project/Area Number |
12450185
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
構造工学・地震工学
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
WATANABE Eiichi Kyoto Univ., Dept.of Civil Engineering, Professor, 工学研究科, 教授 (30026174)
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| 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)
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| Project Period (FY) |
2000 – 2001
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| Keywords | very large floating structure / VLFS / wave response / boundary element method / BEM / fast multipole method / FMM / hydroelasticity |
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| 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.
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