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Date of Publication:2012-01-01

Journal:计算力学学报

Affiliation of Author(s):建设工程学部

Volume:29

Issue:5

Page Number:646-653

ISSN No.:1007-4708

Abstract:This paper describes the development of the Scaled Boundary Finite
   Element Method(SBFEM) for the solution on short-crested wave interaction
   with double-layered porous cylindrical columns.The entire computational
   domain is divided into several sub-domains including two bounded domains
   and an unbounded domain.Through a transformation from Cartesian
   coordinates to Scaled coordinates,a new variational principle
   formulation is used to derive the SBFEM equations in each
   sub-domain,which reduces spatial dimension by one,analytical procedure
   is applied in the reduced direction,and only the boundary of the
   exterior cylinder needs be discretized.Comparison between the present
   numerical solutions with the analytical one is made.The results show
   that the present method yields excellent results with quite few nodes
   and quick convergence.The influence of varying the relative wave
   numberka,radius ratioa/bbetween the two cylinders and the porous
   coefficients of the interior and exterior cylinders on the system
   hydrodynamics,including the wave force,wave run-up,and diffracted wave
   contour is examined, and extensive results on them are presented.The
   present results are of practical significance to the hydrodynamic
   analysis and design for the double-layered porous cylinders.

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