非线性规划法的最小阻力船型研究设计

Research and design of minimum resistance ship form based on nonlinear programming method

以往采用模型试验方案缺少对阻力函数分析,导致设计效果较差。为了获得阻力性能优良船型,利用非线性规划研究最小阻力船型。以兴波阻力、粘压阻力和平板摩擦阻力之和的总阻力为目标函数,设计变量,以此修改船型参数。设置基本约束条件,结合最小阻力船型优化流程,分别对改良后的横向剖面和线型进行分析,由此完成最小阻力船型设计。以集装箱船为试验对象,对比分析模型试验方案和非线性规划方案船型所受阻力情况。由对比结果可知,明显降阻效果证实非线性规划方案更为合理。

In the past,the model test scheme lacked the analysis of resistance function,which led to poor design effect.In order to obtain a ship with good resistance performance,the minimum resistance ship type was studied by using non-linear programming.Taking the total resistance of the sum of wave resistance,viscous pressure resistance and plate friction resistance as the objective function,the design variables are designed to modify the ship form parameters.Setting the necessary basic constraints and combining with the optimization process of minimum resistance ship form,the improved transverse section and line form are analyzed respectively,thus the minimum resistance ship form design is completed.Taking container ships as experimental objects,the resistance of model test scheme and non-linear programming scheme are compared and analyzed.The results show that the non-linear programming scheme is more reasonable because of the obvious drag reduction effect.