基于改进粒子群优化算法的施工期拱坝结构性态反演分析

Inverse analysis of structural behaviors of arch dams during construction period based on improved particle swarm optimization

针对施工期拱坝坝体变形的特点,建立了施工期拱坝坝体变形特殊安全监控模型,对坝体变形中的水压分量进行提取。采用改进的粒子群优化算法对拱坝反问题最优控制解模型进行优化计算,以此完成施工期拱坝结构性态的反演分析。以某拱坝为例,对该拱坝施工期的结构性态进行反演分析。结果表明,坝体变形反演的相对误差均在2%以内,由此验证了所提出方法的可行性。

For their deformation characteristics,a special safety monitoring model for arch dams during the construction period was established.The hydraulic component of the dam deformation was extracted.The improved particle swarm optimization method was employed to optimize and calculate the optimal control model for inversion problems of arch dams.Accordingly,the inverse analysis of structural behaviors of arch dams during the construction period would be performed.An arch dam was taken as an example to inverse its structural behaviors during the construction period.The results show that the relative errors of the inversed dam deformation are all less than 2%,and the feasibility of the proposed method is validated.