基于参数化的3D打印个性化外固定支具设计研究

doi:10.11996/JG.j.2095-302X.2023051050

图学学报 ›› 2023, Vol. 44 ›› Issue (5): 1050-1056.DOI: 10.11996/JG.j.2095-302X.2023051050

基于参数化的3D打印个性化外固定支具设计研究

白宇(), 王坤()

内蒙古工业大学机械工程学院，内蒙古呼和浩特 010051

收稿日期:2023-03-13 接受日期:2023-05-23 出版日期:2023-10-31 发布日期:2023-10-31
通讯作者: 王坤(1980-)，男，副教授，博士。主要研究方向为增材制造及逆向工程、康复医疗器械设计与制造等。E-mail：mengke8806@163.com
作者简介:白宇(1998-)，女，硕士研究生。主要研究方向为康复辅具产品设计。E-mail：goodbyoo@163.com
基金资助:
自治区直属高校基本科研业务费项目(JY20220026);内蒙古工业大学博士人才科研启动基金项目

Research on personalized external fixator design based on parametric 3D printing

BAI Yu(), WANG Kun()

School of Mechanical Engineering, Inner Mongolia University of Technology, Hohhot, Inner Mongolia 010051, China

Received:2023-03-13 Accepted:2023-05-23 Online:2023-10-31 Published:2023-10-31
Contact: WANG Kun (1980-), associate professor, Ph.D. His main research interests cover additive manufacturing and reverse engineering, design and manufacturing of rehabilitation medical devices, etc. E-mail：mengke8806@163.com
About author:BAI Yu (1998-), master student. Her main research interest covers design of assistive rehabilitation products. E-mail：goodbyoo@163.com
Supported by:
Autonomous Region’s Directly Administered Universities Basic Research Business Fee Project(JY20220026);Doctoral Talent Research Start-up Fund Project of Inner Mongolia University of Technology

摘要/Abstract

摘要：

运用参数化的数学逻辑特性，探究个性化的3D打印外固定支具形态快速设计方法。通过分析3D打印外固定支具形态设计要素，归纳出3个形态设计要素变量，并转化为参数变量，构建参数变量之间逻辑关系，得到个性化3D打印外固定支具设计程序；其次，对由参数化程序生成的多种方案进行有限元强度分析以及程序效率测试。程序效率测试结果表明，此程序可快速生成个性化3D打印外固定支具，并且可对3D打印外固定支具个性化形态快速优化。根据有限元分析结果显示，使用此程序生成的多种3D打印外固定支具方案皆满足力学强度要求。通过参数化编写的建模程序实现了个性化3D打印外固定支具形态设计，简化3D打印外固定支具设计流程，可快速优化形态设计，提高设计效率。

关键词: 参数化设计, 外固定支具, 个性化设计, Grasshopper, 3D打印

Abstract:

By employing the parametric mathematical logic features, this study explored a rapid design method for personalized 3D-printed external fixator morphology. Through the analysis of design elements of 3D-printed external fixator morphology, three morphological design element variables were summarized and converted into parameter variables. The logical relationship was constructed between the parameter variables to obtain a personalized 3D-printed external fixator design program. Secondly, finite element strength analysis and program efficiency tests were conducted on multiple schemes generated by the parametric program. The results of the program efficiency test indicated that this program could quickly generate personalized 3D-printed external fixators and efficiently optimize the personalized morphology of the 3D-printed external fixator. According to the finite element analysis results, all the multiple 3D-printed external fixator schemes generated by this program met the requirements of mechanical strength. The modeling program written through parameterization enabled the morphological design of personalized 3D-printed external fixators. It simplified the design process of 3D-printed external fixators, allowing for rapid optimization of morphological design and improving design efficiency.

Key words: parametric design, external fixation brace, personalized design, Grasshopper, 3D printing

中图分类号:

TB472

白宇, 王坤. 基于参数化的3D打印个性化外固定支具设计研究[J]. 图学学报, 2023, 44(5): 1050-1056.

BAI Yu, WANG Kun. Research on personalized external fixator design based on parametric 3D printing[J]. Journal of Graphics, 2023, 44(5): 1050-1056.

图/表 14

图1 3D打印外固定支具设计流程

Fig. 1 Research method of 3D printing external fixation brace

表1 透气孔形态二维平面图

Table 1 Two-dimensional plan view of ventilation hole morphology

参数	透气孔基本单元图形a					透气孔的分布变化b		透气孔的数量c
	几何图形a1			个性化图形a2		规则b1	无规则b2	稀疏c1	适中c2	紧密c3
	六边形	三角形	…	心形	…	规则b1	无规则b2	镂空占比小于50%	镂空占比 50%~70%	镂空占比大于70%
二维平面			…		…

图2 数据获取

Fig. 2 Data acquisition

图3 参数化程序逻辑路线图

Fig. 3 Parametric program logic flow chart

图4 模型重构程序

Fig. 4 Model refactoring program

图5 基准点分布编号

Fig. 5 Benchmark point distribution numbering

表2 形态分布变化结果

Table 2 Results of morphological distribution changes

函数关系式	y=kx (k为常数)	y=sinx	贝塞尔曲线
函数曲线
形态变化

图6 形态设计程序

Fig. 6 Morphological design program

图7 封装程序

Fig. 7 Cluster program

图8 方案图

Fig. 8 Scheme

图9 4种方案的位移结果

Fig. 9 Displacement Results of four schemes

图10 4种方案的应力结果

Fig. 10 Stress results of four schemes

表3 镂空方案强度分析结果

Table 3 Strength analysis results of hollowing out Scheme

方案	位移峰值(mm)	应力峰值(MPa)
菱形	0.011 8	0.402 7
三角形	0.012 1	0.448 4
心形	0.012 3	0.832 9
圆形	0.014 6	0.975 8

表4 建模效率测试(s)

Table 4 Modeling Efficiency Test (s)

方案	程序建模耗时	传统建模耗时
菱形	23	7 100
三角形	19	7 200
心形	16	7 260
圆形	20	7 050

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基于参数化的3D打印个性化外固定支具设计研究

Research on personalized external fixator design based on parametric 3D printing

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