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| Inversion optimization of granite mechanical parameters study based on DSCM-FEM |
| Received:October 04, 2020 Revised:December 22, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20201004001 |
| KeyWord:digital speckle correlation method Finite Element Method mechanical parameter objective function intelligent algorithm displacement field |
| Author | Institution |
| 凌小康 |
北方工业大学 土木工程学院, 北京 |
| 张敬宗 |
北方工业大学 土木工程学院, 北京 |
| 钱鼎 |
北方工业大学 土木工程学院, 北京 |
| 宋义敏 |
北方工业大学 土木工程学院, 北京 |
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| Abstract: |
| Research on the inversion method of mechanical parameters of granite based on Digital speckle correlation Method and Finite Element Method (DSCM-FEM).A kind of granite was selected for three-point bending experiment.Digital speckle correlation method is used as an experimental observation tool.The surface displacement field obtained from the analysis during the loading of the specimen is used as the measured value,and the displacement field obtained by the Finite Element Method is used as the simulated value.In the inverse problem model,the objective function is the error between the measured and simulated values.An optimisation algorithm is used to solve for the Young’s modulus and Poisson’s ratio of the rock.The results show that the objective function based on horizontal displacement has higher identification accuracy and a higher speed;The inversion method of mechanical parameters proposed in this paper has a strong identification ability to identify the mechanical parameters at large intervals,and can determine the mechanical parameters of rocks at once. |