基于改进蚁群算法的结构抗震优化设计  

Seismic optimal design of structure based on improved ant colony algorithm

作　　者：李沛豪[1] 刘崇奇 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310014

出　　处：《空间结构》2017年第2期42-47,共6页Spatial Structures

基　　金：国家自然科学基金项目(51008281)

摘　　要：为将蚁群算法应用于结构抗震优化设计,构造了基于性能的结构抗震优化模型.针对优化模型的特点和算法自身缺陷,从路径选择方式、信息素更新方式以及信息素浓度控制三方面改进算法,通过信息素的动态区块更新策略和整体缩减调整策略的结合实现了算法的阶段性搜索.以三层四跨框架模型作为优化算例,显示了改进蚁群算法在基于性能的结构抗震优化设计中的适用性和有效性,为抗震优化设计提供了一种可行方法.优化结果表明,改进的蚁群算法求解质量更优,稳定性更好,且在搜索效率和求解速度上提升显著.A structural optimization model of the performance-based seismic optimal design is built to apply the ant colony algorithm to the seismic optimal design of structure.According to the characteristics of the structural optimization model and the shortcomings of the algorithm,the ant colony algorithm is improved on the routing scheme,the pheromone updating rule and the pheromone controlling strategy.The search process is divided into two stages by combining the pheromone dynamic block-updating strategy and the pheromone overall reduction strategy.The example of a four-bay three-story frame indicates that,the improved ant colony algorithm is applicable and effective in the optimization,providing apractical way of the seismic optimal design.The result of the optimization also shows that the improved ant colony algorithm can gain better solution quality and possess stronger stability.The search efficiency and the solving speed are also improved significantly.

关 键 词：蚁群算法 基于性能的抗震设计 结构优化 框架结构 截面优化 

分 类 号：TU323.5[建筑科学—结构工程]