岩土工程学报2011，Vol.33Issue(7)：1054-1057,4.
邓肯–张模型参数反演的不唯一性
Non-uniqueness of back-analyzed parameters of Ducan-Chang model
摘要
Abstract
The fact that the back analysis procedure simultaneously selecting failure ratio,cohesion,and frictional angle as objective parameters in Duncan-Chang hyperbolic constitutive model tends to fail is caused by numerical singularity because of non-uniqueness of the solution.The non-uniqueness arises from the co-relation of,,and,which means there are innumerable groups of,,and which can form the same（product of failure ratio and stress level） and produce the same tangent modulus and tangent Poisson ratio under specific stress condition and finally provide the same objective value in back analysis.Effective methods are given to ensure the identification of Duncan-Chang hyperbolic constitutive model during back analysis by means of parameter reconstruction and parameter constraint.关键词
邓肯–张模型/双曲线模型/参数反演/不唯一性Key words
Duncan-Chang model/hyperbolic constitutive model/back analysis/non-uniqueness分类
建筑与水利引用本文复制引用
王建,岑威钧,张煜..邓肯–张模型参数反演的不唯一性[J].岩土工程学报,2011,33(7):1054-1057,4.基金项目
中央高校基本科研业务费专项资金资助项目 （）
河海大学水文水资源与水利工程科学国家重点实验室专项基金项目 （）
