基于放样法的NURBS自由曲面设计  

The Design of NURBS Free Curved Surface Based on Laying-off Law

作　　者：蒋超[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《农机化研究》2005年第6期109-110,114,共3页Journal of Agricultural Mechanization Research

摘　　要：在逆向工程中出现了各种不同的参数曲面描述方法,但是在自由曲面设计过程中,最初的型线只是曲面截面的初步构想,而且轮廓也很粗糙。如何使二维平面的型线描述上升到三维物理空间的曲面构造,是需要解决的问题。为此,给出了用NURBS截面曲线构造自由曲面的放样法,重点研究了在放样法中截面曲线的生成方法,该方法适合于平面脊线同时有多条截面线的自由曲面生成。It appears various methods of the description of parametric curved surface in the reversing project, but in the process of designing free curved surface, the initial molded lines was only the first idea on the section of curved surface, and its outline was quite rough. It is necessary to solve the problem that is how to make the description of molded lines of two-dimensional plane rise to construct curved surface of three-dimensional physical space. For this reason, this paper provides the laying-off law to construct free curved surface with NURBS sectional curves, and mainly researches the created method of sectional curves in the laying-off law. This method is suitable to the plane spine line, moreover, has created many sectional lines of free curved surface.

关 键 词：机械设计 NURBS曲线曲面 理论研究 放样法 自由曲面 

分 类 号：TH122[机械工程—机械设计及理论]