摘要: 介绍了两种改进的群搜索优化算法IGSO(Improved Group Search Optimizer)——快速群搜索优化算法QGSO(Quick Group Search Optimizer)与快速被动群搜索优化算法QGSOPC(Quick Group Search Optimizer with Passive Congregation),并应用于离散变量桁架结构形状优化设计,包括平面和空间桁架结构.几个实例计算结果表明两种改进的群搜索优化算法(QGSO与QGSOPC)与GSO算法及已有文献方法相比具有较好的收敛精度和较快的收敛速度,只需较少的迭代次数就能寻找到最优解,并且QGSO与QGSOPC算法程序语句比GSO算法程序语句简略得多,易于编程实现,可应用于工程结构的优化设计.
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