【摘要】 论述了在流体机械叶片设计过程中采用非均匀有理 B样条方法 ,构造各种曲线、曲面。实现了以统一的数学模型对所用到的自由型曲线的描述和对二次曲线的精确表示 ;增强了叶片计算机辅助设计系统的交互设计能力 ;对改进叶片的设计方法和提高其设计质量具有实际意义。更多还原

【Abstract】 Constructing freeness-curve and surface in design process of the hydro-machine vane by NURBS(non-uniform rational B-spline) was discussed in this paper. The uniform mathematic model was used to construct freeness-curve and conic-curve in CAD system designing of the hydro-machine vane. It could express the conic-curve accurately,strengthen the interactive design function of the system. It has important significance for improving the designing method of the vane and enhancing quality of the vane.更多还原