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

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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.