物理模型使能的机械产品设计知识

传统CAD系统缺乏对工程约束的考虑，不能为设计师提供有效的工程分析计算手段，设计知识的获取和重用非常困难.通过物理模型将工程约束因素引入设计过程，建立物理模型与几何模型集成的设计机制.记录设计历史，经过数据挖掘，获取的设计知识分别由框架、QOC（Questions, Options and Criteria）等知识表达方式描述，建立知识管理系统进行存储，可供检索、浏览和重用.物理模型与几何模型的信息集成，使设计知识的积累、提取和重用变得非常便捷和自然.

Design knowledge acquisition and reuse of physical modal enabled mechanical products

The traditional CAD system lacks the consideration of mechanical constraints,which cannot provide designers with an efficient engineering analysis tool with the difficulty of acquiring and reusing the design knowledge.Mechanical constraints are introduced in the product design process by a physical model,to build a design mechanism integrating the physical model with a geometric model.Design history information is recorded.After data mining,the acquired design knowledge is respectively expressed by frame,QOC,etc.A design knowledge management system is built for knowledge storage,retrieval,browse and reuse.The integration of mechanical constraints with the geometric model enables the accumulation,extraction and reuse of the product design knowledge to become agile and natural.