门式刚架CAD系统设计及其关键技术

Design of Portal Frame CAD System and Its Key Techniques

采用面向对象的程序开发技术,利用AutoCAD强大的图形界面系统和数据库,设计了一套完整的门式刚架CAD系统。介绍了系统的功能设计,ObjectARX和MFC的基本知识,以及利用ObjectARX技术和C++程序语言实现的过程;针对在门式刚架设计中经常出现的楔形单元和偏心单元,采用等效惯性矩方法,及力的传递和刚体运动的一般规律,分别给出了其有限元模型;通过对Microsoft Office办公软件的二次开发,实现了word计算书的自动生成;采用系统设计了一门式刚架厂房,通过比较分析证明系统具有较高的精度和适用性,满足工程设计要求。

The research designs an integrated CAD system for portal frame using the object-oriented development techniques and AutoCAD＇s powerful graphical interface and database system. It introduces the functions of this system, summarizes the basic knowledge of ObjectARX and MFC, and introduces the procedure of program using the technique of ObjectARX and program language of C ＋ ＋. For the tapered dements and eccentric elements which frequently appear in the design of portal frame, the method of equivalent moment of inertia and the general laws of force and rigid body movement are made to get their finite element models. The book of calculation in the style of Microsoft Word is formed automatically through the secondary development of Microsoft Office. The precision and applicability of the system is proved by designing a portal frame factory using the system, which meet the requirements of engineering design.