A new analytical method is proposed to analyze the force acting on a rectangular oscillating buoy due to linear waves.In the method a new analytical expression for the diffraction velocity potential is obtained first ...A new analytical method is proposed to analyze the force acting on a rectangular oscillating buoy due to linear waves.In the method a new analytical expression for the diffraction velocity potential is obtained first by use of theeigenfunction expansion method and then the wave excitation force is calculated by use of the known incident wavepotential and the diffraction potential. Compared with the classical analytical method, it can be seen that the presentmethod is simpler for a two-dimensional problem due to the comparable effort needed for the computation ofdiffraction potential and for that of radiated potential. To verify the correctness of the method, a classical example inthe reference is recomputed and the obtained results are in good accordance with those by use of other methods,which shows that the present method is correct.展开更多
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 numer...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.展开更多
基金This work Was supported by the High Tech Research and Development(863)Program of China under Grant No.2003AA5 16010the Chinese Academy of Science Pilot Project of the National Knowledge Innovation Program under Grant No.KGCX2-SW-305Chinese National Science Fund for Distinguished Young Scholars under Grant No.50125924.
文摘A new analytical method is proposed to analyze the force acting on a rectangular oscillating buoy due to linear waves.In the method a new analytical expression for the diffraction velocity potential is obtained first by use of theeigenfunction expansion method and then the wave excitation force is calculated by use of the known incident wavepotential and the diffraction potential. Compared with the classical analytical method, it can be seen that the presentmethod is simpler for a two-dimensional problem due to the comparable effort needed for the computation ofdiffraction potential and for that of radiated potential. To verify the correctness of the method, a classical example inthe reference is recomputed and the obtained results are in good accordance with those by use of other methods,which shows that the present method is correct.
文摘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.
