波浪中船体運動に及ぼす水面上船体形状の影響に関する研究

概要

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The effect of bow and stern flares on seakeeping qualities of ship is numerically investigated by using a time-domain computation method. A Green function method with a transient pulsating source satisfying the linearized free-surface condition is adopted as the time-domain computation method and is applied to so-called the body non-linear problem which can capture the change of hull form below the calm water due to the ship motion. Computations are carried out for the modified Wigley models which have different flare shapes at bow and stern. Through the comparisons of computed results, it is shown that the effect of flare shape is remarkably observed in the amplitude of heave motion and the added wave resistance, and that they are reduced about 10 percent near the resonance point by adopting adequate flare at bow. The unsteady pressure distribution on the hull is also simulated and the relation between hydrodynamic forces and the pressure near the bow is discussed in detail.
社団法人日本船舶海洋工学会の論文
2003-03-20