2-3 非線形数値シミュレーションによる波漂流減衰力の一考察

抄録

In this study, a numerical approach is taken for the fully nonlinear analysis of the interaction between an incident wave and low-frequency oscillatory motion of a floating body. Using the fully nonlinear simulation method, three motions of a moored two-dimensional body are simulated in presence of a regular wave field and the hydrodynamic force due to the interaction is extracted from horizontal hydrodynamic force act to the body. Based on this numerical study, added mass and damping coefficient due to the interaction are analyzed and a rational explanation of wave-drift damping is proposed. The relation between this explanation and the conventional explanation based on quasi-steady analysis is discussed.