中文摘要：

为解决异构CAD平台间的三维模型转换和共享问题，提出一种新的基于特征模型的集成转换和共享方法。该方法通过集成转换工具实现异构CAD平台的专用模型文件与共享中间文件的转换。首先建立特征模型，分析其信息构成及表达方法；研究了模型文件转换中的关键技术，提出基于CAD平台应用层的几何元素标志方法及标志转换方法；最后设计了集成转换工具的结构模型，并根据该模型编程验证了上述方法的可行性。

英文摘要：

Aimed at exchanging and sharing the 3D model among heterogeneous CAD systems, this paper proposed a new integration-exchange-and-share method based on feature model, in which the integration-exchange tool was used to exchange data between the special model files from heterogeneous CAD systems and shared unified model files. Firstly, built a feature model, and analyzed the information constitutes and expression of the feature model. Secondly, studied the key technologies in the ex- change process of model files, and put forward an identification solution of geometric elements based on application layer of CAD systems. Furthermore, presented the exchange approach of geometric-elements identification. Finally, dosigned and realized the architecture model of integration-exchange tool to verify the method above.