基于NURBS方法的转子锻件的三维几何造型  

Three-dimensional geometric modeling of the rotor′s forging based on the NURBS method

作　　者：刘芳[1] 吕炎[1] 单德彬[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《材料科学与工艺》2001年第1期68-70,共3页Materials Science and Technology

摘　　要：压气机转子是航天发动机上的重要受力构件 ,其形状十分复杂 ,因此准确地描述锻件形状并生成模具的表面模型十分重要 .采用曲面造型中常用的NURBS方法实现了转子锻件自由曲面和解析曲面的几何造型 ,生成了带径向扭曲叶片的转子锻件及其模具模块的表面模型 .利用造型生成的数据文件数控加工得到了模具型腔模块 .造型结果准确地反映了转子锻件的几何信息 ,为后续的有限元模拟前处理奠定了良好的基础 .The compressor rotor is an important part of the space shutter. Because of the complicated shape, it′s very important to describe its shape exactly and to create the surface model of its die section. By use of popular NURBS method, the geometric modeling of the free and analytic surfaces of the rotor′s forging is implemented. And surface models of the rotor′s forging and its die section are created. The die section of the rotor is obtained through numerical control machining by using the data coming from the modeling. The results of modeling exactly reflect the geometric information of the rotor, and can establishe a good base for the forthcoming FEM simulation.

关 键 词：表面造型 NURBS方法 三维几何造型 圆锥曲面 CAD 航天发动机 压气机 转子锻件 

分 类 号：V232[航空宇航科学与技术—航空宇航推进理论与工程] TP391.72[自动化与计算机技术—计算机应用技术]