土体本构模型参数的优化确定

Determining Consitutive Model Parameters of Soils with1 Optimization

提出了一种确定土体本构模型参数的最优化法，该法以试验得到的应力应变关系曲线与由模型算得的曲线绝对误差作为目标函数，以模型参数为变量，利用最优化技术优化迭代，求得最优解，即最优模型参数，它能使得由本构模型求得的应力应变曲线最优地逼近试验曲线．该法快捷、准确，适用于多种模型．

An optimization method for determing parameters of constitutive models of soilshas been proposed in this paper. The difference between tested stress-strain curves andcalculated curves from constitutive models is taken as the objective function,and the modelparameters are variables. By using the optimization technique, the optimun .solution can befound, and it can make the calculated curves to approach the tested curves optimally. Theoptimization method is speedy and accurate, and it can be used for various constitutivemodels.