HULL FORM OPTIMIZATION BY NONLINEAR PROGRAMMING (PART 1) - IMPROVEMENT OF PRISMATIC CURVE FOR MINIMIZING WAVE RESISTANCE
HULL FORM OPTIMIZATION BY NONLINEAR PROGRAMMING (PART 1) - IMPROVEMENT OF PRISMATIC CURVE FOR MINIMIZING WAVE RESISTANCE
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发表时间：
1995
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通讯作者：
Hamasaki;J-i;Y. Himeno
中科院分区：
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作者：
Hamasaki;J-i;Y. Himeno
本文介绍了为减小船舶兴波阻力而对船舶棱柱形即纵向位移分布进行改进的尝试。该方法采用B样条函数表示棱柱曲线，以B样条函数的系数为设计变量，采用Michell近似法计算兴波阻力值，该近似法假定无限吃水船型的梁剖面与所考虑船型的棱柱曲线相同。采用可行方向法进行了包括波阻计算在内的优化过程。计算结果表明，该方法收敛速度快、稳定性好，可用于实际船型的初始设计，但在兴波阻力计算方法和推广到三维情况等方面还有待改进。
This paper describes an attempt to improve ship prismatic form, ie, longitudinal displacement distribution, for minimizing ship wave resistance. The method adopted represents the prismatic curve by use of a B-spline function, takes the coefficients of the B-spline as the design variables, and evaluates the wave resistance value by Michell approximation which assumes an infinite-draft ship form with the beam profile the same as the prismatic curve of the ship form considered. A feasible direction method is applied to the optimizing process including the wave resistance computation mentioned above. It was found that the convergence of the iterative optimizing process is quite rapid and steady, and that the method is useful for the practical initial design of ship forms, although it also leaves aspects for improvement such as the wave resistance calculation method and extension to the 3-dimensional case.