仿生鲨鱼皮盾鳞的参数化三维建模技术  

3D Parametric Modeling Technique of Bionic Sharkskin Denticle

作　　者：李大伟[1] 戴宁[1] 姜晓通 张月[1] 程筱胜[1] 

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《机械工程学报》2016年第23期182-188,共7页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51205192);国家高技术研究发展计划(863计划SS2013AA040801-02);江苏省科技支撑计划(BE2014009-3);航空基金(20151652024)资助项目

摘　　要：鲨鱼皮的减阻机制与其真实几何形态密切相关,针对目前仿生鲨鱼皮建模中参数化设计程度较低的问题,提出一种使用真实鲨鱼皮盾鳞数据进行参数化设计的几何建模方法。该方法将采集的鲨鱼皮μCT数据进行三维重建以获得盾鳞样本模型,并对盾鳞样本模型进行形态分析与参数定义。建立基于微分域网格变形算法驱动的参数化几何建模编辑系统,以实现盾鳞样本模型的几何形态设计。依据鲨鱼皮不同部位盾鳞模型的几何参数,实现了样本模型的参数化变形设计。试验结果表明该技术路线稳定可靠,变形设计过程无形态扭曲,最终结果能够反映鲨鱼皮不同部位盾鳞真实几何形态。Drag reduction mechanism of the sharkskin is closely related to its real geometric structure. Owing to insufficient parametric design applied to bionic sharkskin modeling, a novel parametric modeling method is proposed to simulate the bionic structure based on the real denticle of sharkskin. The 3D denticle sample can be obtained by reconstructing the μCT data and parameter can be defined by analysing the morphology. Differential mesh deformation algorithm is used to establish the mesh editing system to design the morphologic structure of the denticle. Morphologic design can be realized based on the parameter of different part denticle of the sharkskin. The experiments present that the technical route is stable and reliable and non-distortion exist in the process of deformation design. Final results can reflect the real physical structure of different parts of the sharkskin.

关 键 词：仿生设计 鲨鱼皮盾鳞 网格编辑 参数化建模 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]