【摘要】 以杆件横截面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优化设计 ;并采用Algor软件对优化设计结果进行了验证。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 ,验证了该方法的正确性和有效性。更多还原

【Abstract】 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 algorithm based on discrete variables. In this paper, the credible Structural Analysis Program named Algor(Super SAP93) is used to make the finite element analysis of mathematical model. In addition, zero step modification is considered for higer computational precision. At the end, the theories are tested and verified to be correct through two numerical examples. Compared with full stress optimization method, the computational results are satisfactory.更多还原