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工程设计的内涵较广，随着我国大规模经济建设的开展，针对工程设计的图形设计系统应运而生，系统地总结工程设计的特点，有针对性地组建可扩充的、柔性图形设计系统，是本文最重要的出发点。本文借助于计算机辅助设计技术和图形学的研究，讨论了计算机辅助建筑设计和建筑绘图的方法和设计思想，以建筑钢结构设计为例综合分析了钢结构ＣＡＤ系统及节设计的框架结构，该分析对其它工程设计问题有很好的参考价值。
With the connotation of engineering design is broad, with the development of large-scale economic construction in our country, the graphic design system for engineering design came into being, systematic summary of the characteristics of engineering design, targeted to set up scalable, flexible graphic design system, This article is the most important starting point. Based on the research of computer aided design technology and graphics, this paper discusses the methods and design ideas of computer aided building design and architectural drawing. Taking steel structure design as an example, this paper synthetically analyzes the steel structure CAD system and the frame structure of section design, Analysis of other engineering design problems have a good reference value.