Automated optimization of the ship hull form with minimum resistance based on CFD
Automated optimization of the ship hull form with minimum resistance based on CFD
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发表时间：
2015
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通讯作者：
Deng Xianhu
中科院分区：
文献类型：
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作者：
Deng Xianhu
本文基于CFD理论，在SIGHT多学科优化平台上，将船体造型与自动生成技术、CFD技术和混合优化算法相结合，建立了船体外形优化系统。在优化过程中，专门开发了船体造型转换与生成程序，实现了船体造型转换与SHIPFLOW的自动衔接。然后，将一般规划-序列二次规划与二阶混合优化方法相结合，将全局优化问题转化为局部最优问题。为了验证该方法的有效性，对一艘双尾鳍散货船进行了数值优化。结果表明，采用更符合实际的船体前体，兴波阻力显著减小，总阻力增大，证明了CFD技术在船体体型设计和船体水动力性能自动优化领域的可行性和广阔的应用前景。
Based on CFD theory, a hull form optimization system is established in this paper with thei SIGHT multidisciplinary optimization platform,on which the hull transformation and automatic generationtechnology, CFD, and hybrid optimization algorithm are integrated. During the optimization process, thehull form transformation and generation program is specifically developed so that the hull form transforma-tion is automatically connected to SHIPFLOW. The Generic Algorithm-Sequential Quadratic Programmingcombined with the second order hybrid optimization method is then applied to bridge the global optimiza-tion to the search local optimum solution. For validation, the numerical optimization for a bulk ship withtwin-skeg is carried out. The results indicate that the wave-making resistance decreases significantly andthe total resistance increases with a more practical ship hull's fore body,which proves the feasibility andits broad application prospects in the field of hull form design and the automatic optimization of ship hull'shydrodynamic performance using CFD technology.