船体表面变形重构及其CFD数值计算网格自适应方法

Free deformation of ship hullform and its grid self-adaption method for numerical calculation

将船体几何建模重构技术与CFD技术及最优化理论相融合形成的SBD(Simulation Based Design)船型设计方法,使得船型设计从传统经验设计向以数值评估数理寻优为特征的知识化设计新模式转变,为船型设计创新打开了新的局面。本文针对该设计模式中船体几何重构和高精度CFD数值计算网格自适应关键技术进行研究,给出了船体几何整体/局部重构方法及其流程,同时详细阐述了船体表面网格自动变形与体网格自适应方法及其实现过程,突破了高精度CFD方法在船型自动优化流程中应用的瓶颈,为开展SBD船型设计打下了坚实的基础。

Hull geometry modification and reconstruction,optimization algorithms and CFD techniques are combined together into what is known as Simulation Based Design(SBD)technique,which has transformed the experience-based hullform design to numerical evaluation and mathematical optimization design and also opens a new situation for hullform optimization design and configuration innovation.In this paper,hull geome try modification and reconstruction techniques and CFD grid self-adaption method are studied,and the pro cessing diagram of overall/local hullform reconstruction is illustrated.The free deformation of ship surface mesh and its volume grid self-adaption method are elaborated in detail,which solved the problems of applica tion of high-precision CFD method in ship hullform automatic optimization field and provided a firm founda tion for SBD technique.