车身复杂曲面的建模方法与应用

汽车车身是复杂的空间自由曲面，在汽车设计开发过程中，车身设计是直接影响设计成功与否的重要因素，而在车身的计算机辅助设计当中，复杂曲线和曲面的设计又是一个核心的问题。将设计思想或实物原型转变为CAD模型，是加速引进车型的国产化与产品创新设计的关键技术。通过对目前工程界采用的整体造型、参数法及工程图纸、三维测量等反求工程建模方法的介绍，讨论其造型技术的原理、过程和方法，分析了车身曲面球模的特点和主要问题。

The method and application of vehicle body complex surface modeling

Vehicle body consists of complicated spatial free-form surface.During the development of car design,the design of its body is the important factor which will decide whether this design is successfulor not.But the design of complex curve and curve surface is the core in the CAD of vehicle body.It is the key skill to speed up the localization and originality of imported products that the design thought or object prototype can be changed into CAD models.The features and the main problems for modeling of car body surfact are analoyzed by introducing the reverse engineering methods,such as the geometric modeling methods of the whole shape,parameter,design pqper and 3D measuring and discussing the principles,processes and methods of its modeling techniques.