[提要] 以上海外滩金融中心钢结构冠羽为工程背景，讨论了超高层特型钢结构的结构优化设计。利用现代CAD/CAM技术，实现了具有特殊造型钢结构的空间三维实体造型设计、空间力学模型的建立和分析计算，以及三维曲面放样制作和安装的计算机模拟。其设计施工方法可为此类结构工程提供参考。

[关键词] CAD CAM 空间结构 钢结构 花冠艺术造型 屋盖 高层建筑

Based on the roof steel flower project of Finance Center of Waitan in Shanghai, the optimizing of steel structure is discussed. The modern technology of CAD/CAM was used in the roof steel flower project. The three-dimensions architecture model, mechanics model were erected. The manufacture and installation of the space structure were simulated by computer. The practice of this engineering can give a reference to similar engineering.

Keywords: CAD; CAM; steel structure; flower roof