中文摘要：

根据汽车制造企业的需求,分析轿车白车身零部件定位基准及GD＆T等资料,在车身产品信息树的基础上,运用产生式规则和关系数据库搭建轿车白车身GD＆T计算机辅助设计系统的知识库,并运用CATIA二次开发白车身GD＆T计算机辅助设计系统,缩短设计周期,提高设计效率。

英文摘要：

According to the needs of vehicle manufacturers,analyze the car Body-in-white parts of positioning benchmarks and GD＆T,set up an auto-body GD＆T knowledge base using production rules and relational database on the base of auto-body information tree.An auto-body GD＆T Computer Aided Design System is constructed by CATIA secondary development,it can short the design cycle and improve the design efficiency.