双层肋环式球面网壳结构预应力优化设计

Structural optimal design of prestressed double-layer ribbed dome

以拉索预应力空间网壳结构的预应力值P、杆件横截面尺寸变量Ab和拉索截面尺寸变量A(?)以及工程中常用的两种球节点体积为设计变量,以结构自重为目标函数,采用分级优化算法对预应力空间网壳结构进行了优化设计,并采用Algor软件对设计结果进行了验证。通过对比分析,验证了该方法的正确性和有效性。

A two-levels algorithm is applied to the optimal design of prestressed double-layer ribbed dome based on discrete variables, which takes the size variables including cross sections, the volume of ordinary spherical nodes and force variables of tendons as design variables and regards overall gravity as objective function . The results of optimal design are validated by Algor.Contrast and analysis indicate that the two-levels algorithm is valuable and correct.