基于CFD技术对多工况的线型优化

The hull form optimization under multiple operating conditions based on CFD technology

为减少实际运营中的燃油消耗,对多工况多航速点的船舶线型设计提出了更高的技术要求。本文依托3000TEU船项目,结合直艏的几何特征,使用参数化软件CAESES的Feature功能,对首前部线型变形开发线型变换设计模块,构建四变量的线型变换方案;并基于SHIPFLOW软件的Global计算模式,采用Sobol算法,考虑加权算法对多工况点综合评估,在设计工况水动力性能不变的情况下,对压载工况进行优化,其有效功率下降达2.65%,得到符合工程实际的、较优的船体线型。

In order to reduce fuel consumption in actual operation,higher technical requirements have been put for-ward for the design of ship lines with multiple operating conditions and multiple speed points.In this paper,depend on the 3000TEU ship project,combined with the geometric characteristic of the straight bow,using the Feature function of the para-metric software CAESES,the linear transformation design module has been developed for the linear deformation of the bow front,and a four-variable linear optimization scheme was constructed.At the same time,Based on the Global calculation mode of SHIPFLOW software,the Sobol algorithm has been adopted,and the weighted algorithm was used to comprehens-ively evaluate multiple operation conditions.While the hydrodynamic performance remains unchanged under design condi-tions,the effective power under ballast conditions decreases by 2.65%,resulting in ship shape that is in line with engineering practice and relatively optimal.