近似模型方法在螺旋桨优化设计中的应用

Application of Approximate Model Method in Optimization Design of Marine Propeller

为了提高螺旋桨优化设计的质量和效率,将试验设计方法、近似模型和粒子群算法相结合,建立了基于近似模型的螺旋桨优化设计的方法.首先,以螺旋桨的几何参数为设计变量和以推力系数与效率为目标函数,引入试验设计的方法对整个设计空间采样,采用定常面元法预报程序计算出样本螺旋桨的水动力性能.其次,根据采样得到的样本库建立螺旋桨几何参数和水动力性能之间的克里格近似模型.最后,结合该近似模型和粒子群算法对螺旋桨的多目标优化设计.以P4382桨和Ka0.5导管桨为例,验证近似方法应用于螺旋桨优化设计的可行性.结果表明:近似模型方法能够实现目标桨的推力系数和效率的提高,而且优化速度快.

In order to improve the quality and efficiency of optimization design of Marine propeller,this paper,combining DOE and approximate model with the particle swarm optimization algorithm intended to develop the method for optimization design of Marine propeller based on the approximate model.First,geometric parameters were considered as design variables and thrust coefficient and efficiency were considered as the goal function.The DOE method were introduced to sample in the entire design space while the hydrodynamic performance of the propeller samples were calculated using the panel-method for predicting steady performance.Next,according to the sample database,the Kringing model between the propeller geometry parameters and the hydrodynamic performance was established.Lastly,the Kringing model was combined with the particle swarm optimization algorithm for multi-objective optimization design of the propeller.The P4382 and Ka0.5duct propellers were taken as examples to verify the feasibility of the proposed method.The results show that the trust coefficient and efficiency of objective propellers are improved to a great extent with high optimization efficiency.