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本文以Z方向的特征函数系为基础,将二阶散射势分解为满足齐次自由水面条件的速度势φ_2~(S S)及满足齐次柱面条件的速度势φ_2~(S f),分别求解其对大直径圆柱体作用的二阶力。同时还考虑了由一阶速度平方和波面变化产生的二阶力。文中给出了计算各部分二阶力的计算式和kα=0.5-3.0,kd=0.5-5.0范围内的计算曲线供设计者应用。
Based on the eigenfunctions in the Z direction, the second-order scattering potential is decomposed into the velocity potential φ_2 ~ (SS) that satisfies the homogeneous free surface conditions and the velocity potential φ_2 ~ (S f) that satisfies the homogeneous cylinder conditions. Second-order force on large-diameter cylinders. At the same time, the second-order force generated by the first-order velocity squared and wave surface changes is also considered. The calculation formulas for calculating the second-order force of each part and the calculation curve in the range of kα = 0.5-3.0 and kd = 0.5-5.0 are given for designers’ application.