基于参数化建模的船体型线优化设计

Lines Optimization Based on Parametric Modeling Approach of Hull Form

应用CAESES软件和SHIPFLOW软件建立优化设计平台,对某6 800m2牲畜船的船首进行全参数化建模,通过改变控制船体曲面的设计变量,并结合Sobol和NSGA-Ⅱ两种算法,对设计吃水和压载吃水两种工况下总的兴波阻力最佳船型方案进行搜索.通过CFD方法将优化后型线方案与母型船的总阻力性能做比较.结果表明,优化后船体兴波在两种工况下均得到改善,且总阻力也得到了明显降低,验证了基于参数化建模的船体型线优化设计方法的有效性和工程实用性.

Both CAESES and SHIPFLOW are used to establish optimization design platform, and a ge- ometric model of 6800 m2 livestock carrier＇s bow is built by full parametric modeling approach of hull form. A series of design variables of hull surface are generated, and automatical optimization of bow lines is realized with the goal of minimizing resistance under the design draft and ballast draft using Sobol and NSGA-Ⅱ searching method. At last the optimization for the hull surface of 6 800 m^2 cattle ship is completed and the results calculated by CFD method indicate that the total resistance reduces significantly. It confirms that the hull form automatical optimization based on parametric modeling method is feasible.