作　　者： ; ; ;

机构地区： 同济大学土木工程学院

出　　处： 《湖南大学学报（自然科学版）》 2012年第7期14-19,共6页

摘　　要： 基于非均匀有理B样条技术,根据给定型值点进行曲面重构.为寻求既满足建筑意图又受力合理的曲面造型,提出型值点调整法优化曲面形态的方法.该方法以自重作用下结构变形最小为目标函数,以型值点坐标为设计变量,采用梯度法调整型值点位置,优化曲面形态,得到高刚度合理曲面.通过两个工程实例自由形态曲面优化,证明所提方法的可行性和高效性. Based on computer-aided geometric design, the surface was reconstructed according to the given data points by means of non-uniform rational B-spline technique. With the aim of finding an optimum surface that meets the architectural intent data points, an adjustment method was presented, which takes minimum structural deformation under gravity as the objective function and data point＇s position as design variables. Gradient method was employed to modify the free form surface by adjusting design variables. The surface shape was modified iteratively according to data points＂ changes. The approach has been imple- mented into two projects and the feasibility of the approach was demonstrated.

关 键 词： 自由形态 非均匀有理 样条 型值点 优化

领　　域： [建筑科学]