2022 Volume 78 Issue 2 Pages I_259-I_264
A numerical analysis method using the boundary element method (BEM) was developed for motion of a floating caisson with flume-type anti oscillation tanks. Fluid forces were calculated in the fluid calculation region around the floating caisson and in the fluid calculation region inside the anti oscillation tank, respectively, and the momentum was calculated by the equation of motion coupled with the fluid force calculations. Free-motion experiments were conducted on a floating caisson with Flume-type anti oscillation tanks. The natural period of the roll increased and that of the pitch decreased with different lengths of anti oscillation tank in the roll and pitch. The numerical analysis reproduced the change in the natural period of the free-motion. Comparison with previous experiments confirms that the amount of the Pitch and Heave under regular wave and the damping effect of the anti oscillation tank are reproduced.
