异质零件的动态建模方法  

Modeling for the dynamic heterogeneous objects

作　　者：杨继全[1] 李娜[1] 施建平[1] 唐文来 张钢 Yang Jiquan;Li Na;Shi Jianping;Tang Wenlai;Zhang Gang(School of Electrical and Automation Engineering,Nanjing Normal University,Jiangsu Nanjing,210023,China)

机构地区：[1]南京师范大学电气与自动化工程学院,江苏南京210023

出　　处：《机械设计与制造工程》2021年第12期1-4,共4页Machine Design and Manufacturing Engineering

摘　　要：某些零件的材料既不是均匀的,也不是基于梯度的,称之为动态异质零件。介绍了异质零件动态模型的建模方法,使用微四面体,以材料特征为顶点,通过材料向量分布角度调整实现动态变化,以达到材料的渐变或突变效果,结合STL格式,给出的模型可以直接用在3D打印中制作动态异质零件。该方法的优点是:以每个特征节点为定义单元,结合有序的拓扑结构,能够表达多种材料的非均质分布情况,以及材料分布突变、断裂等异常情况;按照空间点云数据集映射至每个材料切片层的方式进行二维切片的材料定义,对每层切片进行材料分区,同时建立了材料切片与物理切片的对应关系,可用于CAD/CAM一体化设计。The static heterogeneous objects(HEOs) modeling method described in the previous chapter is mainly applicable to heterogeneous objects whose morphological structure and material distribution are simple. The material in some areas is neither homogeneous nor gradient-based, then we call such objects dynamic heterogeneous objects. The micro tetrahedron is used, the material feature is taken as the vertex, and the dynamic change is realized by adjusting the distribution angle of material vector. The final model file based on STL file can be directly used to fabricate dynamic heterogeneous objects in 3 D printing process. The advantages of this method are: Taking each characteristic node as the definition unit, combined with the ordered topology, it can express the heterogeneous distribution of a variety of materials, as well as the abnormal conditions such as sudden change and fracture of material distribution.According to the mapping of spatial point cloud data to each material slice, the material of two-dimensional slice is defined, the material partition is carried out for each slice, and the corresponding relationship between material slice and physical slice is established, which can be used for CAD/CAM integrated design.

关 键 词：动态模型 功能梯度材料 混杂微四面体 

分 类 号：TS853[轻工技术与工程]