Effects of incident wave angle and seabed on hydrodynamic characteristics of a buoy are studied using the Finite Element Method (FEM). The hydrodynamic coefficients of different conditions are obtained after the numeric method is validated through the comparisons between the numeric results and the analytic results of simple cases. The Biconjugate Gradient Stabilized (BiCGStab) algorithm, considered to be among the most powerful algorithm in solving linear systems, is employed to improve the efficiency of the analysis. The results presented here shed some new light on the behaviors of ocean structures in complex sea areas.
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