面向车身结构分析的骨架驱动模型变形方法

提出一种面向车身结构分析的骨架驱动模型变形方法,实现有限元模型的有效重用.根据给定车身结构有限元模型的几何特点,定义描述车身结构的骨架曲线与包围车身结构的控制体.建立骨架曲线与模型控制体的约束关系,用户可对骨架曲线进行编辑,得到目标控制体形状.最终应用体变形方法,重构内嵌的有限元模型.数值实例表明,骨架驱动的模型变形方法能够实现有限元模型的有效重用,并为用户提供了直观便捷的交互方式.

Skeleton-driven Model Editing for Auto-body Structural Analysis

We presented a skeleton-driven model deformation method for the effective reuse of finite element (FE) models in auto-body structural analysis. Skeletons were defined to describe the body structure and control blocks embedding the body structure based on the geometry of the given FE model. Then, the constraint between the skeleton curve set and control blocks of the given model were established so that the user can derive the desired shape of control blocks by editing the skeleton curves. Finally, the deformed FE model was reconstructed by using the spatial deformation method. Numerical experiments show that the proposed method can obtain physically plausible deformed results and achieve the effective reuse of the given FE models. In addition, using skeleton curves as the handles can provide users with an intuitive way to manipulate FE models.