基于船体空间点云的自由曲面变形方法  

Free-form Surface Deformation Method Based on Hull Space Point Cloud

作　　者：岳朝欢 王健[3] 冯佰威[1,2] YUE Chaohuan;WANG Jian;FENG Baiwei

机构地区：[1]武汉理工大学船海与能源动力工程学院,湖北武汉430063 [2]武汉理工大学高性能船舶技术教育部重点实验室,湖北武汉430063 [3]中国舰船研究设计中心,湖北武汉430064

出　　处：《江苏船舶》2023年第2期4-7,共4页Jiangsu Ship

摘　　要：以空间点云为基础,结合FFD自由变形方法对空间点云进行坐标变换,再通过逆向工程中NURBS技术对点云进行曲面重构,从而建立适用于船体几何的变形技术。首先阐述FFD算法的基本原理和变形规则;然后以Bernstein多项式为基函数构建数学模型,研究控制点数量对变形结果的影响,探讨FFD技术在船舶上应用的优缺点;最后以KCS运输船为例完成局部(球鼻艏)变形与船体整体变形并生成适用于CFD软件计算的光顺曲面,研究结果为后续的船型优化提供了良好的变形工具。Based on spatial point clouds and combined with FFD free deformation method, coordinate transformation is performed on spatial point clouds, and then surface reconstruction is performed on the point clouds using NURBS technology in reverse engineering to establish deformation techniques suitable for ship geometry. Firstly, the basic principles and deformation rules of the FFD algorithm are explained;Then, a mathematical model is constructed using Bernstein polynomials as the basis function to study the influence of the number of control points on deformation results and the advantages and disadvantages of FFD technology in ship applications are explored;Finally, taking the KCS transport ship as an example, local (bulbous bow) deformation and overall hull deformation are completed, and a smooth surface suitable for CFD software calculation is generated. The research results will provide a good deformation tool for subsequent ship type optimization.

关 键 词：FFD方法 船体变形技术 控制点 曲面重构 

分 类 号：U662.2[交通运输工程—船舶及航道工程]