| 锦屏二级水电站岩石夹层非定常参数剪切蠕变模型及参数识别研究 |
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| 引用本文： | 罗润林,阮怀宁,朱珍德,朱昌星.锦屏二级水电站岩石夹层非定常参数剪切蠕变模型及参数识别研究[J].岩土力学,2006,27(Z2):239-243. |
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| 作者姓名： | 罗润林 阮怀宁 朱珍德 朱昌星 |
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| 作者单位： | 河海大学 岩土工程研究所，南京 210098 |
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| 基金项目： | 国家自然科学基金资助(No. 50539090)。 |
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| 摘 要： | 通过对锦屏二级水电站岩石夹层的剪切蠕变试验结果分析，提出了非定常参数的Burgers蠕变模型。由于对部分参数考虑了其值随时间改变的特性，该模型不仅能够反映岩石夹层的加速蠕变过程，而且能比定常参数Burgers模型更好地描述初始蠕变和稳态蠕变过程。由于非定常参数Burgers模型的参数较多，参数辨识不宜采用迭代法或者最小二乘法等线性优化方法，而采用基于随机搜索的粒子群算法，并取得了较好的效果。
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| 关 键 词： | Burgers模型 非定常参数蠕变模型 粒子群算法 参数识别 |
| 收稿时间： | 2006-10-28 |
A study of shear creep model with non-stationary parameters for interlayer of Jinping Cascade 2 Hydroplane project and parameter identification |
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| LUO Run-lin,RUAN Huai-ning,ZHU Zhen-de,ZHU Chang-xing.A study of shear creep model with non-stationary parameters for interlayer of Jinping Cascade 2 Hydroplane project and parameter identification[J].Rock and Soil Mechanics,2006,27(Z2):239-243. |
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| Authors: | LUO Run-lin RUAN Huai-ning ZHU Zhen-de ZHU Chang-xing |
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| Institution: | Institute of Geotechnical Engineering, Hohai University , Nanjing 210098,China |
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| Abstract: | A Burgers model with non-stationary parameters was presented in this paper based of the study on the shear creep experiments of the interlayer in Jinping Cascade 2 Hydroplane project. Because it takes into account the character of partial parameter that their value change with the passage of time, this model can not only describe the process of acceleration creep stage, but also is better than Burgers model with stationary parameters to describe the process of initial creep deformation and the process of steady creep deformation. Burgers model involve too many parameters, so particle Swarm Optimization (PSO) algorithm is adopted to identify the model parameters, and the results are satisfactory. |
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| Keywords: | Burgers model non-stationary parameters creep model PSO parameters identification |
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