引入新算子采用隔代映射遗传算法对钢框架进行优化设计

通过引入新的交叉和变异算子,改进遗传算法。隔代映射遗传算法将种群分为多个子群,通过个体迁移、加强多元性及求较优解确定不同种群之间的联系。将新算子引入隔代映射遗传算法中,并采用此算法,按AISC-ASD规范规定,对钢框架进行最小重量优化设计。通过对某3跨3层钢框架和5跨22层特殊钢框架的优化设计,验证了本方法的有效性。对优化求解方法做了重要改进,减少了有限元分析计算量。

Optimum Design of Steel Frames Using a Multiple-Deme GA with Improved Reproduction Operators

In this paper, the performance of the genetic algorithm is improved by introducing some new crossover and mutation operators. The new operators are incorporated into a multiple-deme genetic algorithm in which population is divided into subpopulations and communication between different demes is established through migration of individuals, enhancing diversity and resulting in better solutions. This algorithm is applied to the minimum weight design of steel frames subjected to actual strength and ductility c...