土体邓肯-张非线性弹性模型参数反演分析

BACK-PERFORMING ANALYSIS FOR PARAMETERS OF DUNCAN-CHANG NONLINEAR-ELASTIC SOIL MODEL

针对邓肯 -张土体的非线性 -弹性模型 ,本文用变尺度法编制了优化程序 ,对该模型参数进行参数识别 ,结合工程算例进行验证 ,并进行了反馈分析。结果表明变尺度法是一种很好的约束优化算法 ,其收敛速度快、准确性高 。

In accordance with the Duncan Chang nonlinear elastic soil model,that,the DFP method is used to draw up optimization programme for parameteric identification of the parameters in this model,it is verified combined with a calculation example of the practical engineering project,and its feed back analysis is carried out too.From final results are shown that the DFP method is a good constrained optimization calculating method with quick convergence and high accuracy,and the results of feed back analysis can conform well to the reality of engineering pratice.