斜航する船に働く造波横力について

概要

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The lateral force and the resistance that are caused by wave generation acting on the body advancing with steady drift angle were discussed by the asymptotic expansion method under the assumptions, F_n≪1 and β≪1, where F_n is the Froude number and β the drift angle. The technique of the Low Speed Wave Making Theory was applied to represent the flow field around the body. Lateral force and resistance are obtained by using the amplitude functions of the free wave derived by the both of the Approximation in x-Integral Method and in y-Integral Method those were identified. The coefficients of the lateral force and the resistance were calculated for not so slender floating prolate spheroids and vertical elliptic cylinder. It was shown that the first approximation of the coefficient of the lateral force, which acts opposite to the lift caused by the separated vortices in the case of bluff bodies, are proportional to βF_n^6 and second one to βF_n^7 sin(1/F_n^2+π/4).
社団法人日本船舶海洋工学会の論文