Abstract
AbstractThe scaled boundary finite‐element method (SBFEM) by Tao et al. (Comput. Methods Appl. Mech. Engrg 2007; 197:232–242) is only applicable for wave scattering problems by a structure of homogenous material. In this paper, the SBFEM is extended to deal with the interaction of water waves and porous offshore structure with a partially solid wall or opening. The cylindrical structure is considered as a circular cylinder of anisotropic material in the form of variable porosity. A central feature of the newly extended method is that the non‐homogenous term caused by the complex configuration of the structure is processed by introducing a variable porous‐effect parameter G. This leads to the final scaled boundary finite‐element equation is still homogenous and can be solved in a similar manner. The modified SBFEM thus remains a semi‐analytical fundamental‐solution‐less method. Numerical experiments in water wave interaction with a typical coastal/offshore structure—a cylinder with a partially solid wall or opening attest to the efficacy and accuracy of the proposed approach. Copyright © 2009 John Wiley & Sons, Ltd.
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