【摘要】 企业要想在激烈的市场竞争中取胜，就必须充分利用现有的产品资源，来实现对市场需求和客户订单的快速响应．为了克服传统ＣＡＤ的不足，研究了在关系型ＣＡＤ平台支持下，基于事物特性的可重用产品模型的建模技术．以液压缸建模为实例，给出了在自顶向下的产品设计过程中，可重用产品模型中数据及其关系的形式化表达．通过在企业中的成功实践表明，该模型能够有效地表达设计关系，是产品快速、准确地进行变型的基础．更多还原

【Abstract】 In order to succeed in market competition, enterprises must make full use of the existing product resources to respond to the market’s needs and the customers’ orders rapidly. A reusable product modeling technique based on article characteristics supported by relational CAD platform is presented to overcome shortcomings of traditional CAD software. The expression of assembly relations in a Top Down design process by a hydraulic cylinder model is also given. By means of the successful implementation in enterprises, it can be seen that the model can express the assembly and numeric constraint relations effectively which are the base of rapid and right product variant.更多还原