波浪中の船体運動の計算に関係する二三の問題について

概要

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In this report the authors carried out theoretical investigation into the hydrodynamic forces related to ship motions, the results of which are as follows: 1) The validity of Watanabe's approximate method, which is used for the calculation of the wave forces in Iongitudinal ship motions, was investigated. As a result, we can safely conclude that the method yields preferable results so far as it is used for the calculation of ship motions by strip method. 2) The asymptotic value of A^^-_H (the ratio of the amplitude of the progressive wave induced by the heaving of a cylinder with Lewis form section to that of the heaving) was shown to be [numerical formula] when ξd=κd (κ=wave number, d=draft) tends to ∞, where a_1 and a_3 are the coefficients of Lewis form. 3) The relations among the coefficients of hydrodynamic forces in transverse ship motions were investigated. Putting the damping coefficients due to wave Ns: sway-sway, N_R: roll-roll N_<SR>: sway-roll, l_W=N_<SR%gt;/N_S and the wave forces F_e: sway force, M_e: roll moment, the authors proved the following relations: l_w^2=(N_R)/(N_S) and M_e=l_wF_e.
社団法人日本船舶海洋工学会の論文
1971-06-30