CAD数据交换与互操作性的研究  

CAD data exchange and interoperability

作　　者：杨双荣[1] 胡沙[1] 李建军[1] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074

出　　处：《计算机工程与设计》2010年第7期1580-1584,共5页Computer Engineering and Design

基　　金：国家"十一五"科技支撑计划基金项目(2006BAF01A43)

摘　　要：针对目前三维CAD数据的交换状况,分析了基于标准模型和专用接口等两种主要CAD数据交换技术。以STEP标准为例,阐述了基于标准模型的CAD交换技术的架构和实际交换过程中遇到的数据丢失问题。专用接口是点对点的交换,是最原始的解决CAD数据交换的方法,涉及到各个CAD软件的商业利益,在CAD软件众多的情况下,使得CAD数据交换异常复杂。这两种CAD数据交换方法存在一个重大缺陷,即产生的都是"哑"模型,在非原CAD系统中无法对其进行编辑,极大地阻碍了CAD数据的交换。同步建模技术采用概念设计的理念和非历史特征的建模方法,不仅加速了模型设计,也较好地解决了CAD数据的交换问题。There are two main CAD data exchange technologies,neutral and native file formats exchange technology.STEP as one of the most prominent neutral file formats,is also aimed to solve the 3d CAD data exchange problem.However,the loss of data or meaning can hardly be avoided in practice.Data exchange between heterogeneous applications is not really supported.3D data are still exchanged in native file formats.The native file formats exchange technology is the origin method,the performance is poor and industrial hard to uptake.Besides,there is a significant shortcomings of the technology used at present that the generated model is a dumb solid,making it impossible to edit the parametric features of such models.This big problem may will be solved by a new synchronous modeling tech-nology which applied concept design methodology and delivers a major advancement above parametric,history-based modeling.

关 键 词：CAD STEP 数据交换 互操作性 同步建模 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]