基于NURBS的半开式整体叶轮智能建模  

Intelligent Modeling of Semi-open Integral Wheel Based on NURBS

作　　者：李媛[1] 王义文[1] 刘献礼[1] 程耀楠[1] 姜志鹏[1] 

机构地区：[1]哈尔滨理工大学机械工业切屑控制与高效刀具重点实验室,黑龙江哈尔滨150080

出　　处：《哈尔滨理工大学学报》2014年第1期12-15,共4页Journal of Harbin University of Science and Technology

基　　金：国家科技重大专项资助(2012ZX04014-051);黑龙江省自然科学基金重点项目(ZD201005)

摘　　要：针对半开式整体叶轮的结构复杂、建模周期长及叶片交错性强等特点,在UG平台下进行半开式整体叶轮自动建模与曲面分析.根据叶轮结构特征,本文将节点插入算法应用到叶片截面线造型中,通过插值计算生成等参数截面控制点,建立基于NURBS的叶片曲面造型方法,并用UG/GRIP编制了NURBS曲面造型程序,实现三阶NURBS曲面叶片造型.开发曲面分析模块,分析截面型线和叶片曲面的光顺度,为叶轮自动建模提供验证;输出法矢量和最大、最小曲率半径,为进一步进行叶轮CAM加工提供帮助.Abstract ： Aiming at the characteristics of the complex,long-modeling cycle, impeller staggered and so on for o- verall semi-open impeller, carrying out overall semi-open impeller automatic modeling and surface analysis in the UG platform. According to the impeller structural features, this article applies the node insertion algorithm to the cross- section line shape of the impeller, achieving the blade of third-order NURBS surface by generating the parameters section of the control points through the interpolation calculation, establishing impeller surface modeling methods based on NURBS and using UG/Grip to process the NURBS surface. Providing validation for the automatic modeling by developing the surface analysis module to analyze the cross-section lines and the degree of faring for the curved im- peller. Input vector, the maximum and the minimum curvature of radius for the further CAM processing of impeller

关 键 词：整体叶轮 NURBS方法 曲面分析 二次开发 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]