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| An equivalent analysis of unidirectional viscoelastic jointed rock based on the adaptive algorithm in time-domain |
| Received:August 08, 2008 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20093003 |
| KeyWord:Jointd Rock viscoelasticity equivalent analysis adaptive algorithm finite element |
| Author | Institution |
| 任懿 |
大连理工大学工程力学系工业装备结构分析国家重点实验室,大连 |
| 杨海天 |
大连理工大学工程力学系工业装备结构分析国家重点实验室,大连 |
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| Abstract: |
| A reasonable joint model is necessary for the numerical simulation of viscoelastic jointed rock, If considering joints and rock mass individually with their own constitutive model, the computational expense will be challenged when the number of joints is fairly large. This paper presents a numerical model to predict equivalent constitutive relationship and deformation of unidirectional viscoelastic joint rock. An adaptive precise algorithm in the time-domain and a simple equivalence assumption are combined to convert a time dependent inhomogeneous problem into a series of recursive time independent homogeneous problems which can be solved either by FEM or other well developed numerical schemes. An equivalent numerical simulation for an underground cave in unidirectional viscoelastic joint rock is given and compared with the solution provided by ANSYS In the viewpoint of balance between computing accuracy and efficiency, the results are fairly good. |
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