Inversion of mechanical parameters of geomaterials based on DSCM-FEM

SONG Yi-min; LING Xiao-kang; ZHANG Jing-zong; ZHU Chen-li; REN He; YUAN De-shun

doi:10.16285/j.rsm.2021.0165

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Inversion of mechanical parameters of geomaterials based on DSCM-FEM

更新时间：2026-06-25

- Inversion of mechanical parameters of geomaterials based on DSCM-FEM
- Vol. 42, Issue 10, Pages: 2855-2864(2021)
- 作者机构：
  
  北方工业大学土木工程学院,北京,100144
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2021.0165
  CLC： TU41
- Online First：20 October 2021，
  
  Published：2021
- 稿件说明：
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SONG Yi-min, LING Xiao-kang, ZHANG Jing-zong, et al. Inversion of mechanical parameters of geomaterials based on DSCM-FEM[J]. 2021, 42(10): 2855-2864.
DOI：

SONG Yi-min, LING Xiao-kang, ZHANG Jing-zong, et al. Inversion of mechanical parameters of geomaterials based on DSCM-FEM[J]. 2021, 42(10): 2855-2864. DOI： 10.16285/j.rsm.2021.0165.

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。

Abstract

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.

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