自由曲面空间网格结构的选型优化研究  

Research on structural selection and optimization of free-form spatial grid structure

作　　者：杨建林[1] 王辉[2] 田家安 冯若强[2] YANG Jian-lin;WANG Hui;TIAN Jia-an;FENG Ruo-qiang(College of Management Engineering,Jiangsu Urban and Rural Construction College,Changzhou 213147,China;School of Civil Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]江苏城乡建设职业学院管理工程学院,江苏常州213147 [2]东南大学土木工程学院,江苏南京211189

出　　处：《空间结构》2024年第3期12-21,共10页Spatial Structures

基　　金：国家自然科学基金项目(51978151)。

摘　　要：为了快速获得经济、合理的自由曲面空间网格结构拓扑类型,基于数字化技术,提出了一种同时考虑网格拓扑与杆件截面的多工况选型优化方法.首先根据空间网格结构选型的特点改进了遗传算法,并详细介绍了优化算法的数学模型;然后基于Rhino+Grasshopper平台采用WinFrom开发了集成化的优化平台;最后通过波浪形网架结构和星型单层网壳结构算例,展示了本优化平台的工作流程以及选型优化效果.结果表明,本文方法可充分探索空间结构拓扑关系且效率高,选型和优化后的网格拓扑方案相比原始方案用钢量有所下降,同时在结构的刚度和稳定性方面有所提升.In order to quickly obtain an economical and reasonable topological type of free-form surface space grid structure,this paper proposes a multi-mode selection and optimization method that considers both grid topology and member section based on digital technology.Firstly,according to the characteristics of spatial grid structure selection,the genetic algorithm is improved,and the mathematical model of the optimization algorithm is introduced in detail.Then an integrated optimization platform is developed based on Rhino+Grasshopper platform and WinFrom.Finally,the work flow and selection optimization effect of this optimization platform are demonstrated through the calculation examples of a wavy grid structure and a star single-layer reticulated shell structure.It is shown that the method in this paper can fully explore the topological relationship of spatial structure efficiently.Compared with the original scheme,the steel consumption of the selected and optimized grid topology scheme is reduced,while the stiffness and stability of the structure are improved.

关 键 词：空间网格结构 结构选型 网格拓扑 结构优化 GRASSHOPPER 

分 类 号：TU393.3[建筑科学—结构工程]