单层球面网壳选型优化设计  

Scheme Selection and Optimum Design of Single-Layer Reticulated Domes

作　　者：刘宗发[1] 晏致涛[2] 王彦生[1] 李作良[1] 

机构地区：[1]河南科技大学建筑工程学院,洛阳471003 [2]重庆大学土木工程学院,重庆400045

出　　处：《重庆建筑大学学报》2007年第4期83-86,共4页Journal of Chongqing Jianzhu University

摘　　要：采用改进的自适应遗传算法来解决单层球面网壳结构构件截面优化问题，并采用VC＋＋语言编写了相应的自适应遗传算法和有限元计算程序，可以实现单层球面网壳结构的自动优化设计。设计了不同类型、跨度和矢跨比的网壳优化算例；并通过对按照现行相关规范优化设计的单层球面网壳和符合现行相关规范要求但未经优化设计的单层球面网壳用ANSYS软件进行考虑几何非线性的屈曲分析，分别确定其屈曲荷载与设计荷载之比，以比较它们的受力和安全性能。结果表明采用自适应遗传算法进行离散变量的网壳结构截面优化设计容易收敛，优化效果良好。如果综合考虑经济和安全因素，设计网壳时，其矢跨比取1／6～1／5比较合适。The member bar＇s section optimization problem of single-layer reticulated domes is solved with adaptive genetic algorithm,and the program of adaptive genetic algorithm and finite element is written in VC＋＋ language according to the introduced algorithm,which can realize automatic optimum design of single-layer reticulated domes. Some optimum examples of Single-Layer Reticulated Domes design are given, whose type and span and the ratio of height to span are different. The ratio of buckling load to designing load,which can be used to evaluate bearing and safety performance, will be got through the buckling analysis of the single-layer reticulated domes which are optimum designed according to applicable procedures and the single-layer reticulated domes which are designed according to applicable procedures but not be optimized. Thus reliability of optimum design and performance of kinds of single-layer reticulated domes can be assessed. The optimum result of the single-layer reticulated domes, which is designed with the optimum design program of latticed domes based on adaptive genetic algorithm and finite element theory, indicated that the optimum design program has the character of easy convergence,good and reliable result. If the economic factor and safety factor are taken into account integrally, that the ratio of rise to span of single-layer reticulated domes equals to 1/6-1/5 is reasonable.

关 键 词：单层球面网壳 结构优化设计 遗传算法 屈曲分析 

分 类 号：TU33[建筑科学—结构工程]