考虑跨洋特征及碎冰对快速性影响的极地探险邮轮型线优化

Hull form optimization of polar expedition cruise ship considering transoceanic characteristics and brash ice effect on resistance and propulsion

[目的]全球减碳背景下,为应对极地船舶设计建造的环保要求,需开展跨洋航行时碎冰水域对极地探险邮轮船体型线优化设计的影响规律研究,以获得最佳节能型线。[方法]针对极地探险邮轮的跨洋航行特征,采用航区权重方法进行量化评估,分析碎冰对阻力和推进效率的影响。应用计算流体力学耦合离散元法(CFD-DEM)来分析螺旋桨的碎冰水域性能,建立以联合自航功率为目标的优化模型,进而对全船参数化模型开展设计航速下的优化计算。[结果]计算结果表明,优化后的船型可以满足排水量要求,有效降低了2种水域下的航行功率,其联合自航功率降低了9.71%。[结论]研究成果验证了基于权重优化方法的可行性和合理性,可为极地探险邮轮的型线和推进器优化设计提供参考。

[Objectives]In the context of global carbon reduction,in order to meet the environmental require-ments of the design and construction of polar ships,this paper studies the impact of brash ice on the optimal design of polar expedition cruise ships when navigating across oceans and designs the most optimal energy-saving hull lines.[Methods]In view of the transoceanic characteristics of polar expedition cruise ships,the navigation region-based weighting method is used to quantify the evaluation and analyze the impact of brash ice on resistance and propulsion efficiency.An analysis is carried out of the performance of the propeller in broken ice channel through the coupling calculation of the computational fluid dynamics-discrete element method(CFD-DEM),an optimization model with the goal of combined self-propulsion power is established,and optimization calculations are performed for the parametric model of the whole ship at the designed speed.[Results]The calculation results show that the optimized ship hull meets the requirements of displacement and effectively reduces navigation power in open water and broken ice channel with a combined self-propulsion power reduction of 9.71%.[Conclusions]The results of this study verify the feasibility and rationality of optimization based on the weighting method,and can provide references for the optimization design of hull form and thrusters of polar expedition cruise ships.