基于非线性规划法的最小阻力船型设计

Design of minimum resistance ship form based on nonlinear programming method

最小阻力船型设计可以有效减少燃油消耗和污染物排放。船型设计是一个多目标优化过程,本文提出一种基于非线性规划法的最小阻力船型设计方法,对设计流程进行详细分析,定义和选择设计变量,并确定设计的约束条件,提出将遗传算法应用于最小阻力船型设计,给出船型结构和优化后的前半体横剖线图,对优化前后的兴波阻力系数、摩擦阻力系数和形状阻力系数进行计算和对比,结果表明基于非线性规划法可以有效减小船舶阻力,且船舶兴波阻力系数减小较多。

The minimum resistance ship design can effectively reduce fuel consumption and pollutant emissions.Ship shape design is a multi-objective optimization process.In this paper,a minimum-resistance ship shape design method based on nonlinear programming method is proposed,the design process is analyzed in detail,the design variables are defined and selected,and the design constraints are determined.The application of genetic algorithm to the minimum-resistance ship shape design is proposed,and the ship shape structure and the transverse profile of the optimized front half body are given.The wave-generating resistance coefficient,frictional resistance coefficient and shape resistance coefficient before and after optimization are calculated and compared,and the results show that the nonlinear programming method can effectively reduce the ship resistance,and the ship wave-generating resistance coefficient is greatly reduced.