Research on Design Optimization of High-Speed Ship Bulbous Bow Based on Nelder-Mead Algorithm

IF 0.5 4区工程技术 Q4 ENGINEERING, MARINE

Journal of Ship Production and Design Pub Date : 2022-02-03 DOI:10.5957/jspd.07190039

Liu Jie, Zhang Bao-Ji, Xu Ning

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引用次数: 0

Abstract

In order to reduce the wave-making resistance of ships, this paper proposes an optimization design method for bulbous bow form based on potential flow theory. In this paper, we restrict our interest to parametric deformation of the bow, at the same time constrain the displacement and the length of the ship. Based on Rankine source method, the wave-making resistances of DTMB5512 and ITTC Ship A-2 are calculated. For optimization, Sobol algorithm is selected to create sample space; based on it, we use Nelder–Mead algorithm to obtain the optimal hull form in the space. Additionally, we compare and analyze the hydrodynamic performance of the ship. The results show that the optimization design method reduces the wave-making resistance of DTMB5512 and ITTC Ship A-2, which verifies the feasibility of the method. Energy Efficiency Design Index (EEDI) guides the future development of the shipbuilding industry toward green ships and accelerates the pace of energy conservation and emission reduction. EEDI is closely related to hull form; therefore, the design optimization of ship hull focus on reducing EEDI becomes the central issue of the current research (Hou et al. 2018).

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基于Nelder-Mead算法的高速船舶球首设计优化研究

为了减小船舶的造浪阻力，本文提出了一种基于势流理论的球茎型船首优化设计方法。在本文中，我们限制了对船首参数变形的研究，同时限制了船体的位移和长度。基于朗肯源法，计算了DTMB5512和ITTC A-2船的造波阻力。优化时，采用Sobol算法创建样本空间;在此基础上，采用Nelder-Mead算法求解空间中最优船体形状。此外，还对船舶的水动力性能进行了比较和分析。结果表明，该优化设计方法降低了DTMB5512和ITTC船A-2的造波阻力，验证了该方法的可行性。能效设计指数(Energy Efficiency Design Index, EEDI)引导未来船舶行业向绿色船舶方向发展，加快节能减排步伐。EEDI与船体形状密切相关;因此，以降低EEDI为重点的船体设计优化成为当前研究的核心问题(Hou et al. 2018)。

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来源期刊

Journal of Ship Production and Design ENGINEERING, MARINE-

CiteScore

1.10

自引率

0.00%

发文量

期刊介绍： Original and timely technical papers addressing problems of shipyard techniques and production of merchant and naval ships appear in this quarterly publication. Since its inception, the Journal of Ship Production and Design (formerly the Journal of Ship Production) has been a forum for peer-reviewed, professionally edited papers from academic and industry sources. As such it has influenced the worldwide development of ship production engineering as a fully qualified professional discipline. The expanded scope seeks papers in additional areas, specifically ship design, including design for production, plus other marine technology topics, such as ship operations, shipping economics, and safety. Each issue contains a well-rounded selection of technical papers relevant to marine professionals.