摘要
基于Mohr-Coulomb和修正Drucker-Prager本构模型,开展基于数字散斑相关方法和有限元法(DSCM-FEM)的相似模型力学参数反演方法研究。进行相似模型试验,以数字散斑相关方法作为试验观测手段,分析得到的模型加载过程中表面位移场作为测量值,通过有限元法得到的位移场作为仿真值,构建反问题模型,分别基于Mohr-Coulomb本构模型和修正Drucker-Prager本构模型,利用优化算法对相似模型的力学参数进行反演。研究结果表明:所提出的DSCM-FEM力学参数反演方法使得散斑区域内位移测量值和位移仿真值在数值上和规律上都吻合,基于修正Drucker-Prager本构模型的反演精度更高。
Based on Mohr-Coulomb and modified Drucker-Prager constitutive model,the inversion method of mechanical parameters of similarity model is performed using digital speckle correlation method and finite element method(DSCM-FEM).The similarity model test is carried out,the digital speckle correlation method is used as the experimental observation method,the surface displacement field is analyzed as the measured value during the loading of the model,and the displacement field obtained by the finite element method is used as the simulation value to construct the inverse problem model.The mechanical parameters of similar models are reversed by the optimization algorithm based on the Mohr-Coulomb and the modified Drucker-Prager constitutive model respectively.The test results reveal that the measurements and simulation displacements in the speckle area obtained by the proposed DSCM-FEM mechanical parameter inversion method match both numerically and regularly.The inversion constitutive model based on the modified Drucker-Prager model has higher inversion accuracy.
作者
宋义敏
凌小康
张敬宗
朱晨利
任何
苑德顺
SONG Yi-min;LING Xiao-kang;ZHANG Jing-zong;ZHU Chen-li;REN He;YUAN De-shun(School of Civil Engineering,North China University of Technology,Beijing 100144,China)
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2021年第10期2855-2864,共10页
Rock and Soil Mechanics
基金
国家自然科学基金(No.51774015)。
关键词
模型试验
本构模型
数字散斑相关方法
有限单元法
力学参数
鱼群算法
model test
constitutive model
digital speckle correlation method
finite element method
mechanical parameters
fish school algorithm
