大振幅動揺する細長船に働く非線形流体力に関する研究 : 波浪中抵抗増加に及ぼす水面上船体形状の影響

概要

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The numerical method has been developed for predicting the nonlinear hydrodynamic forces acting on a ship advancing with a constant speed in regular head sea. On the assumption of the slender ship approximation, 2-dimensional boundary value problems in the inner region are formulated and solved at each time step with the higher-order boundary element method. In order to examine the validity of this method, the added-mass and damping coefficients of the modified Wigley model in heave and pitch are calculated. Comparisons with experimental results show good agreement. The present procedure is applicable to the prediction of time-mean wave forces acting on a ship. Numerical results of the added resistance for the modified Wigley models are compared with the experiments and the calculation results based on linear theory. Calculations are carried out for two models with different above water hull forms. Significant effects of the above water forms on added resistance are confirmed.
社団法人日本船舶海洋工学会の論文
1998-09-25