一种基于三角面片法线方向设计复杂异形模型自由曲面分型面的方法
发布时间：2022/5/17 9:35:15    作者：董香平1，樊庆文1，蒋汶莙2，周明聪1，熊良胤1，裴宏亮*,1      【字体：大 中 小】
董香平1，樊庆文1，蒋汶莙2，周明聪1，熊良胤1，裴宏亮*,1
（1.四川大学 机械工程学院，四川 成都 610065；2.中国工程物理研究院 总体工程研究所，四川 绵阳 621900）
摘要：提出一种基于复杂异形体模型三角面片法线方向设计异形分型面的方法，利用数字化三维模型构建三角面片模型的半边数据结构；计算所有三角面片法线方向，确定最佳拔模方向；根据三角面片法线方向与最佳拔模方向的空间关系，将各三角面片聚类并确定异形分型线，沿最佳拔模方向进行平移，得到复杂模型的异形分型模具。以人体胸骨模型的模具设计为例，计算人体胸骨模型的最佳拔模方向，设计异形分型线，获得胸骨模型的异形分型模具，并将该方法应用于人体其他器官模型。实验证明，该方法适应性强，能够快速确定异形分型面，具有重要的实用价值。
关键词：复杂异形模型；三角面片；分型线；最佳拔模方向
中图分类号：TG76 文献标志码：A doi：10.3969/j.issn.1006-0316.2022.05.001
文章编号：1006-0316 (2022) 05-0001-07
A Method of Designing Free-Form Parting Surface of Complex Special-Shaped Model Based on the Normal Direction of Triangular Patch
DONG Xiangping1，FAN Qingwen1，JIANG Wenjun2，ZHOU Mingcong1，XIONG Liangyin1，PEI Hongliang1
( 1.School of Mechanical Engineering, Sichuan University, Chengdu 610065, China; 2.Institute of System Engineering, China Academy of Engineering Physics, Mianyang 621900, China )
Abstract：A method of designing a special-shaped parting surface based on the normal direction of the triangular patch of a complex special-shaped model is proposed. The digital three-dimensional model is used to construct the half-edge data structure of the triangular patch model. The normal direction of all the triangular faces is calculated and the best draft is determined. According to the spatial relationship between the normal direction of the triangular patch and the best draft direction, we clustered the triangular patches and determined the special-shaped parting line, and then translated along the best draft direction to obtain the special-shaped part of the complex model mold. Taking the mold design of the human sternum model as an example, we calculated the best draft direction of the human sternum model, designed the special-shaped fractal line, obtained the special-shaped fractal mold of the sternum model, and applied this method to other human organ models. Experiments have proved that the method has strong adaptability. It can quickly determine the special-shaped fractal surface, which is of important value in practice.
Key words：complex special-shaped model；triangular patch；parting line；optimum draft direction
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收稿日期：2021-11-17
基金项目：四川省苗子工程项目（2020JDRC0029）；四川省重点研发项目（22ZDYF2983）
作者简介：董香平（1996－），男，四川广元人，硕士研究生，主要研究方向为计算几何、计算机视觉、模式识别，E-mail：522797562@qq.com。*通讯作者：裴宏亮（1997－），男，甘肃岷县人，博士研究生，主要研究方向为计算机图形学、人工智能，E-mail：peihongliang@hotmail.com。
 

 

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