基于特征的表面表达模型–体参数化模型转化方法

Feature-Based Transformation Method of Boundary Representation to Volume Parametric Model

摘要: 体参数化模型由于其可以直接用于等几何分析的特点，在计算机辅助设计领域受到广泛关注。为保证模型质量，提高体参数化模型建模效率，本文对模型特征进行定义，提出可应用于体参数化模型的特征树与父子特征框架，搭建以特征为主导的数据结构，用特征来控制表面表达模型数据的显示和交互，并在后端同时生成相应的体参数化模型。以轴承座模型为例，用该方法得到的轴承座体参数化模型可以直接用于等几何分析，分析结果与ANSYS有限元分析结果相近，证明该方法的可靠性。

Abstract: Parametric solid models have garnered widespread attention in the field of computer-aided design due to their direct applicability to isogeometric analysis. To ensure model quality and enhance the efficiency of parametric solid modeling, this paper defines model features and proposes a feature tree and parent-child feature framework applicable to parametric solid models. A data structure led by features is constructed, using them to control the display and interaction of surface representation model data, while simultaneously generating the corresponding parametric solid model at the backend. Taking the bearing base model as an example, the parametric solid model derived from this method can be directly used for isogeometric analysis, with results closely matching those from ANSYS finite element analysis, thereby proving the reliability of this approach.