广东工业大学学报 ›› 2006, Vol. 23 ›› Issue (3): 77-80.

• 综合研究 • 上一篇    下一篇

几何约束条件在变形B样条曲线造型中的实现

  

  1. 广东工业大学机电工程学院; 广东工业大学机电工程学院 广东广州510090; 广东广州510090;
  • 出版日期:2006-06-02 发布日期:2006-06-02
  • 基金资助:

    广东省自然科学基金(04105386,5300090)

Realization of Geometry Constraints in Deformable B-spline Curve Modeling

  1. (Faculty of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510090,China)
  • Online:2006-06-02 Published:2006-06-02

摘要: 针对在基于物理变形的B样条曲线造型中施加几何约束的问题,提出了基于自由度转换的解决方法.对于特定的线性几何约束条件,得到施加约束后的变形B样条曲线的有限元方程,并通过对约束条件下的初始自由度进行转换,将有限元方程转换为自由度减少后的无约束方程进行求解.对常见的几何约束进行了应用分析,从应用实例上看,该方法取得了良好的效果. 

关键词: 变形曲线; 几何约束; B样条; 有限元;

Abstract: In order to solve the problem of B-spline curve modeling based on physically deforming with geometry constraints,a method of freedom degree transformation is presented.For certain geometry constraints,by transforming the constrained degrees of freedom,the solution of the reduced unconstrained degrees of freedom finite element is obtained.Examples are presented to show the efficiency of this method.

Key words: deformable curve; geometry constraint; B-spline; finite element;

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