以虚拟现实技术进行产品的造型设计和最终产品仿真，在设计阶段替代传统的实物模型，从而缩短产品开发周期、降低开发费用，在工程设计中具有重要意义。为此，讨论了基于产品特征的信息描述，参数化特征的造型方法和特征造型系统的结构与功能，应用计算机辅助设计手段，将产品的参数等属性与实体模型融为一体，提出了一种在产品造型设计中基于特征的计算机建模方法，充分地表达了模型的形状及其特征参数，并以减速箱特征产品造型设计为例，有效地解决了特征模型中几何信息，物理信息的表达及其生产管理系统的信息化。

To research the problem of plastic art design and emulation of products with the virtual reality technology can short the product development cycle and reduce the cost. This paper discusses the information based on the product feature ,solid model with parameters, the structure and function of this system. Combined the product properties with its solid model. Proposed a method with CAD to create the model of the product based on features in the product design. Expressed its feature parameter and shape of model fully .In the case for a deceleration box the feature model has solved the problem of physical information ,geometry information and the informative process in its production management system efficiently.

TB472 TP391.4