基于改进鸡群优化算法的海上筑堤有限元反演分析

Finite Element Inversion Analysis of Maritime Embankment Based on Improved Chicken Swarm Optimization Algorithm

鉴于海上筑堤预测施工结束后稳定期的沉降是关系到堤防质量、安全和经济的重要问题,依据初期实测资料,提出了基于改进鸡群优化算法材料参数反演程序,反演出更为准确的土体材料参数,进而建立整个施工期内的有限元数值模型,加入反演获得的计算参数,预测了施工后期和稳定期的堤坝沉降,并将预测结果与实测值进行对比。结果表明,预测效果良好,拟合度较高。说明基于改进鸡群优化算法反演程序可以更快的收敛速度与更高的收敛精度找到最优的土体参数,全局寻优能力强。

The maritime embankment prediction settlement after the completion of the construction is an important issue related to the quality of the embankment, safety and economy. Based on the initial measured data, a parameter in- version procedure based improved Chicken Swarm Optimization was proposed. More accurate soil material parameters was obtained. And then finite element numerical model for the whole construction period was established. Using the cal- culation parameters obtained from the inversion procedure, the settlements of embankment during the late construction and steady period were predicted. The predicted results were compared with the measured values. It shows that the pre- diction effect is good and the fitting degree is high, which demonstrates that inversion procedure based improved Chicken Swarm Optimization can find the optimal soil parameters with faster convergence rate and higher accuracy, and it has goodt global optimization ability.