小水线面双体船(SWATH)优化设计及数值方法

Numerical method and program for SWATH ship optimization design

介绍了基于阻力最小的小水线面双体船主尺度优化方法,引入逐步二次回归的优化思想,结合可变误差多面体算法和乘子法,形成了独特的优化算法。开发了阻力计算和主尺度优化程序(SWATHRES和SWATHOPT),根据输入的主尺度及优化变量约束,程序内确定给定几何表达的主体和支柱船型,在指定的设计航速下,计算输出阻力最小的优化船型及相应的阻力曲线。计算表明:该系统可用于SWATH阻力预报和方案设计阶段的主尺度选型。

An optimization method and program is introduced,which optimizes small waterline twin hull （SWATH） ship geometry and results in a minimum resistance and an effective horsepower （EHP） for a specified speed of the ship.Importing Twice Regressive idea to traditional optimization method forms a special rithmetic. A program code of resistance prediction and principle dimension optimization （SWATHRES and SWATHOPT） were developed by input several main dimension design varibles and contraints; the shape of a strut and main body can be determined by analytic expression in program, at a pariticular design speed, the ship hull of minimized resistance and corresponding resistance components can be output.The presented method and program can be reliably applied inthe early design stage of SWATH ship.