【作者】 李佩霖；

【导师】 薛开；

【作者基本信息】 哈尔滨工程大学 ， 机械制造及其自动化， 2009， 硕士

【摘要】 CAD、CAE技术经过不断的发展和完善,已日趋成熟,但这两大系统还是处于相对的独立。CAD/CAE系统的集成对于提高产品设计水平和质量、降低生产成本和材料消耗、提高产品性能和寿命、缩短设计周期等都具有重要的指导意义和实用价值。如何才能将这两大系统结合起来,使其功能最大化发挥,一直以来是一个急需解决的问题。STEP标准的出现为CAD/CAE系统集成提供了一种可行的方法。本文对基于STEP的CAD/CAE系统集成的技术进行了研究,主要研究内容如下:深入研究了STEP标准以及AP209应用协议。依据CAD/CAE系统集成采用的方法、影响系统集成的因素以及共享几何模型存在的问题,拟定了CAD/CAE系统集成的总体方案,并设计了标准CAD数据转换器。该转换器主要由信息提取模块、信息处理模块和STEP文件生成模块组成。首先,在对AP203文件解读的基础上,利用ST-Developer 10.0和VC++6.0集成的环境,借助ROSE函数库,对AP203文件的几何和拓扑信息进行提取。其次,采用哈希算法进行冗余信息的处理。同时,对于影响有限元网格划分的数据信息,提出在不破坏原几何拓扑关系的基础上,利用相关几何拓扑信息,通过合并再生几何信息,重构几何实体的方法。最后,利用ROSE类库早、晚两种联编方式,将几何、材料、网格等数据信息写入到设计对象中,生成AP209文件。本文开发的标准CAD数据转换器能实现AP203文件向AP209文件的转换,从而实现了CAD/CAE的弱耦合集成。基于STEP标准的CAD/CAE系统集成方法,有利于数据统一管理以及系统功能扩展。更多还原

【Abstract】 With constantly developing and booming,CAD and CAE technology have been ratherly progressed,but the two systems are still at a relatively independent. CAD/CAE integration has great guiding significance and utility value on product design and production.It’s urgent to find the way to combine the two systems for great effectiveness.The appearance of STEP standard provides a feasible solution to CAD/CAE integration.The paper mainly focuses on the method of CAD/CAE integration which is based on STEP standard.The major work is as follows:After in-depth study of STEP standard and application protocol AP209, according to the current CAD/CAE integration methods,factors that affect the system integration and problems that exit in sharing geometric model,the overall scheme is worked out,as well as the CAD data converter.The converter is mainly made up of information extraction module,information processing module and STEP file generated module.Firstly,on the basis of the AP203 file interpretation,geometric and topological information in AP203 file is extracted through ROSE Library in ST-Developer 10.0 and VC++6.0 integration environment.Then,HASH algorithm is used to deal with redundant information.For the data information that influences finite element meshing,the paper puts forward a method that reconstructing the geometric entity by merging and regenerating geometric information with related geometric and topological information no destroying original topological relationship.Finally,using ROSE early-binding and late-binding mode,the data information such as geometry,material and grid is written into the design object to output AP209 file.In the paper,the converter can implement the file conversion from AP203 to AP209.This weak-coupling CAD/CAE integration method based on STEP standard is favorable for data management and function expansion.更多还原