摘要
有限元数据库是工程数据库中的新课题,本文就有限元数据库的特点和建立有限元数据库的方法进行了详尽的分析,提出了一个适合有限元数据处理的关系/网络混合模型,并介绍了基于该模型开发的EDBMS FEDO系统的DDL、对网络进行操作的DML和其它主要软件包,包括存取结构软件HVMMS、数据通信区管理软件CAMS和数据词典等。
In this paper, a detail investigation about the feature of data proces sing in finite element and the way to set up a finite element database has been ma de, and a hybrid of network/relation model, obtained by defined foreign key in network model, has been proposed too. Based on this model, a small EDBMS FEDO ( Fiaite Element oriented Data Organization ) has beea partly developed. The f inish ed components, written in Fortran 77, are composed of a storage-access software HVMMS, a DDL interpreter FEDDL, a DB communication area management system GAMS, a DD management system DDMS, a dynamic sub-schema management system DSSM and DML on network. Its working environment is a Fortran subroutine call, FEDO has the advantage of easily available DDL, powerful processing ability on variable-length record and additive reconstructing. Besides, by being compatible with JINEGS file system, FEDO can treat the large amount of unstructured data appearing in finite element software.
出处
《计算机辅助设计与图形学学报》
EI
CSCD
1990年第2期41-49,共9页
Journal of Computer-Aided Design & Computer Graphics
