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论文类型：期刊论文

发表时间：2013-01-01

发表刊物：Springer Series in Geomechanics and Geoengineering

收录刊物：EI、Scopus

页面范围：709-713

ISSN号：18668755

摘要：When a conventional method such as linear regression is insufficient to identify the constants and parameters of an advanced constitutive model, numerical optimization techniques are often used. In employing numerical optimization to constitutive model calibration, an objective function essentially needs to be formulated in the form of nonlinear least squares where the sum of the differences between the measured and computed data points are quantified. When a minimum value of the objection function is obtained, the corresponding variables are the optimized model constants and parameters. Due to the complexity in the format of objective functions in constitutive model calibration, gradient-based methods are seldom used. In this paper, non-gradient based methods namely Direct algorithm was implemented to calibrate a modified Cam-Clay model against laboratory data. ? Springer-Verlag Berlin Heidelberg 2013.