Numerical Solution to Identification Problems of Material Parameters in Geotechnical Engineering

The identification of material parameter in geotechnical engineering is a typical complicated nonlinear function optimization problem. The optimum inverse method based on ABAQUS is discussed in the paper. A new evaluation function is established which unites multi objective function to single objective function according to the actually measures and corresponding calculated results. The inversion model combining the Nelder-Mead algorithm and finite element method is proposed, in which the finite element program is embedded as a module in the Nelder-Mead algorithm. This approach is applied to the parameter identification of strongly weathered granite as an example. The results show that the calculated results are similar with the measured ones, which suggests that the reasonability of finite element identification for material parameters.