非定常波動場に及ぼす船体非線形影響に関する研究

概要

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A time domain computation method by using a transient pulsating source satisfying the linearized free-surface condition is developed and applied to so-called the body nonlinear problem in seakeeping formulated with space-fixed coordinate system. The foeced heave and pitch motions of ships with forward speed are simulated for modified Wigley model and Series-60 (C_b=0.6) and the results are compared with experiments and other computation methods. Through the comparisons with respect to the added mass and damping forces, the efficiency of the present is confirmed. Computations for variety of motion amplitudes are also carried out for a modified Wigley model and body non-linearity effects which are caused by the change of the wetted surface beneath the still water are remarkably obserbed in hydorodynamic forces and pressure.
社団法人日本船舶海洋工学会の論文
2002-03-20