由于叶片在沿叶高方向上截面内的截线不是单值函数,所以需要用参数样条的方式构造整个叶片曲面。在分析叶片沿叶高方向上截面数据的基础上,本文将笛卡儿坐标系下的截面数据转换到柱坐标系下,并以极角和叶高为参数构造了双三次插值B样条曲面。 Since the cross-section of the blade in the cross-section along the blade height direction is not a single-valued function, it is necessary to construct the entire blade surface in a parametric spline manner. Based on the analysis of the cross-section data of the blade in the leaf-height direction, this paper converts the cross-section data in the Cartesian coordinate system into the cylindrical coordinate system and constructs the bi-cubic interpolation B-spline surface with the polar angle and leaf height as parameters .