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Indexed by:会议论文

Date of Publication:2002-05-26

Included Journals:SCIE、EI、CPCI-S、Scopus

Volume:12

Page Number:487-493

Key Words:time-domain method; second-order; boundary element method; hydrodynamic force

Abstract:The nonlinear wave radiation of a surface-piercing 3D arbitrary body is investigated by a time-domain second-order method. In this approach, Taylor series expansions are applied to the body surface boundary condition and the free surface boundary conditions, and Stokes perturbation procedure is then used to establish corresponding boundary value problems at the first and the second-order of waves steepness with time-independent boundaries. A boundary element method based on a B-spline expansion is used to calculate the wave field at each time step, and numerical integration in time has been applied for predicting boundary, conditions on the free water surface and the body surface at the next time step. An artificial damping layer is adopted on the free surf-ace to avoid the wave reflection. Additionally, a mathematical transform is used to remove the second spatial derivative in the body surface boundary condition. Numerical results of hydrodynamic forces are presented for the case of a truncated surface-piercing circular cylinder undergoing specified sinusoidal surge and heave motions. Comparison has been made with others' time-domain and frequency-domain approaches, and good agreement has been found between the present result and the. result from a frequency-domain method.