| 摘 要: 为实现计算机辅助设计(CAD)与计算机辅助分析(CAE)的一体化,构建适用于等几何分析的模型,有关学者提出体参数化造型方法。针对体参数化模型构建过程中存在的操作烦琐、耗时长等问题,文章提出一种参数驱动体参数化模型快速构建的方法。首先,从草图中提取模型轮廓参数,利用提取到的参数构建模型的样条曲线轮廓,其次结合剖分算法对曲多边形进行剖分,最后将二维曲面映射到三维得到体参数化模型。实例表明该方法能够通过较少的模型参数快速得到体参数化模型,无须进行节点矢量等数据的重复输入。 |
| 关键词: 等几何分析;体参数化;剖分;样条 |
|
中图分类号: TP391.4
文献标识码: A
|
|
| Volume Parameterized Modeling Based on Parameter Drive and Automatic Subdivision |
|
KUANG Chuanji, CHEN Long
|
(School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200082, China)
834317210@qq.com; cl@usst.edu.cn
|
| Abstract: In order to achieve the integration of Computer-Aided Design (CAD) and Computer-Aided Engineering (CAE), and build models suitable for Isogeometric analysis, scholars have proposed a volume parameterized modeling method. Aiming at the problems of cumbersome operations and time consumption in the process of volume parameterized modeling, this paper proposes a parameter-driven method for rapid construction of volume parameterized models. Firstly, model profile parameters are extracted from the sketch, and the extracted parameters are used to construct the spline profile of the model. Then, subdivision algorithm is used to subdivide the curved polygon. Finally, the 2D surface is mapped to the 3D, so as to obtain a volume parameterized model. Examples show that this method can quickly obtain volume parameterized models with fewer model parameters, without the need for repeated input of data such as node vectors. |
| Keywords: Isogeometric analysis; volume parameterization; subdivision; spline |
