摘要
基于遗传算法 ,根据巷道开挖后变形收敛观测资料 ,建立了岩体初始应力场非线性反演方法 ,解决了传统线性化反演解的不唯一性问题和迭代发散问题 .根据不同观测仪器的分辨率和精度 ,建立了目标函数的权矩阵和迭代终止准则 .数值计算结果表明 ,所提出的非线性反演方法具有全局收敛特性和良好的抗观测噪音能力 .
Based on genetic algorithm, the nonlinear inversion algorithm was developed to identify the initial stress fields in the rock masses according to the observed deformation data after the excavation of tunnel. The non uniqueness and non convergence of the classical linear inversion algorithm were overcome by making use of the nonlinear inversion algorithm. The weight matrix and the terminal criterion were also built on the basis of the resolution ratio and precision of different observation equipment. The computational results make known that the inversion method proposed is global optimum and to have the property of protecting noises in the deformation observation.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2001年第1期13-17,共5页
Journal of China Coal Society
基金
国家自然科学基金! (10 0 72 0 14 )
工业装备结构分析国家重点实验室开放基金! (GZ990 8)
