汽轮机叶片截型数据样条重构

就CAD二次开发工程中遇到的叶片截型数据点重构样条的问题进行了分析,提出了一个基于德布尔(de Boor)样条值点计算递推法的反求样条控制顶点的方法,推导了具体计算的公式,给出了计算方程组。在实践中应用该方法得到了过型值点的光顺的样条曲线,获得了满意的效果。最后就多种CAD软件实现的反求控制顶点进行了比较。

Reconstructing B-Spline for Turbo Blade Section

This paper mainly studied reconstructing B spline with the points on the spline.In the practice,it is found that just with the points data and the constant matraix to solve the spline control points is not suitable for uneven spline.The re- suits show that nomater the parametica method for the knots,there are peaks on the spline ,the splines are not smooth. Based on de Boor algorithm,a new method for regenerating control points is proposed.A example is supplied,and the re- suits is satisfied.Finally as the same data,different CAD software are used to generate the Spline.The results are not same,especially the control points near the end points.