基于离散变量的网壳结构截面优化设计  

SIZE OPTIMIZATION DESIGN OF SPATIAL LATTICE SHELL BASED ON DISCRETE VARIABLES

作　　者：尚凌云[1] 鹿晓阳[2] 周学军[3] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]东建筑工程学院力学研究所,济南250014 [3]山东建筑工程学院土木系,济南250014

出　　处：《工业建筑》2004年第9期74-77,98,共5页Industrial Construction

摘　　要：以杆件横截面积及工程中常用的两种球节点体积为设计变量 ,以工程造价为目标函数 ,采用基于离散变量的两级优化方法对空间网壳结构进行了截面优化设计 ;编制了SIOP网壳结构截面优化设计程序 ,解决了与Algor(SAP93)程序的接口问题。为提高精度 ,在优化设计过程中采用了 0阶修正。最后通过两个算例 ,与满应力优化设计结果进行了比较 。Taking the sizes of cross sections and the volume of ordinary spherical nodes as design variables and overall cost as objective function,the size optimization design of spatial lattice shell is developed by means of two- level algorithem based on discrete variables.The credible structural analysis programme named Algor(Super SAP93) is combined to accomplish the finite element analysis of mathematical model.In addition,zero- step modification is considered to improve the computational precision.At the end,through two numerical examples,the theories above are tested and verified to be correct.Compared with full stress optimization method,the computational results are satisfactory.

关 键 词：截面优化 空间网壳结构 离散变量 杆件 工程造价 球节点 优化设计 SAP 有效性 编制 

分 类 号：TU399[建筑科学—结构工程]