港口机械工程数据库管理系统简介

Introduction of Engineering Database Management System of Harbor Machinery

重点研究港口机械ＣＡＤ系统的内部数据库管理。文中给出了内部数据库系统的组织结构，分析了内部工程数据如图形数据、标准数据的特点。在内部数据库系统中，研究了图形数据的层次管理、版本管理和驱动管理，以及标准数据的规范化管理。最后研究了内部数据库与外部数据库的通讯机制。通过对内部数据库的研究，有效地解决了工程数据在管理上的困难，对港口机械ＣＡＤ系统有着重要的意义。

In this paper,the interior data management of Harbor Machinery CAD(HMCAD) system is mainly researched.The structure of the interior database system is given.And the features of interior data is analyzed such as drawing data,standard data and so on.At the same time, in the interior database system, the hierarchy managements, the version management and the driving management for drawing data are studied. The standard management for standard data is realized as well. Finally, the conmunication mechanism between the exterior database and the interior database is studied. The problems of engineering data management are effectively settled by researching on the interior database. That is very important for HMCAD system.