基于径向基插值的曲面变形方法在船型多目标优化中的应用

Application of Surface Deformation Method Based on Radial Basis Interpolation in Multi-objective Optimization of Ship Hull

在船体型线优化中,精确有效的船体曲面表达和变形技术在优化中起着重要的作用,文中研究基于径向基插值的曲面变形方法在船型多目标优化中的应用,采用基于径向基插值技术的船体曲面变形方法,以DTMB5415船型为研究对象,结合计算流体力学计算工具和多目标粒子群算法,以兴波阻力最小为优化目标,完成了不同弗劳德数(Fr)下的船舶阻力性能优化.在优化结果中选择3条典型船型进行分析:Fr为0.41时方案1较优,兴波阻力减小了18.83%;Fr为0.22时方案3较优,兴波阻力减小了49.66%;Fr为0.28时方案2为折中方案,兴波阻力减小了30.23%.优化结果表明,基于径向基插值技术的船体曲面变形方法可有效产生光顺的船体型线.

Accurate and effective hull surface expression and modification techniques play an important role in optimization of ship hull.Taking the DTMB5415 ship as the research object,the ship resistance performance under different Froude numbers(Fr)was optimized with the surface modification method based on radial basis interpolation and combined with CFD calculation tool and multi-objective particle swarm algorithm.In the optimization results,three typical ship types were selected for analysis.When Fr was 0.41,the plan 1 was better,and the wave resis-tance was reduced by 18.83%.When Fr was 0.22,the plan 3 was better,and the wave resistance was reduced by 49.66%;when Fr was 0.28,the plan 2 was a compromise,and the wave resistance was reduced by 30.23%.The optimization results show that the surface deformation method based on the radial basis interpolation technique can effectively produce smooth hull profiles.