| 岩石流变参数鲁棒辨识方法研究 |
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| 引用本文： | 韩冰,王芝银.岩石流变参数鲁棒辨识方法研究[J].岩土力学,2008,29(10):2661-2666. |
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| 作者姓名： | 韩冰 王芝银 |
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| 作者单位： | 1. 中国石油大学,城市油气输配技术北京市重点实验室,北京,102249;中国石油管道公司,管道研究中心,河北,廊坊,065000
2. 中国石油大学,城市油气输配技术北京市重点实验室,北京,102249 |
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| 摘 要： | 基于室内岩石三轴蠕变试验资料对岩石的流变本构模型及流变参数进行辨识,是研究岩石流变力学特性的重要手段.由于受到试验条件和随机噪声的影响,试验数据中经常夹杂有异常值,采用传统的最小二乘法进行参数估计其结果往往会出现较大偏差.为了克服异常值对参数辨识结果的影响,引入统计学中的稳健估计理论,通过对实测的样本资料赋予不同的权重,采用双二次加权最小二乘法对流变参数进行估计.对比试验和计算结果表明,该方法能够有效地减小异常值对辨识结果的影响,在估值精度、收敛性、鲁棒性方面均优于传统的最小二乘估计方法.
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| 关 键 词： | 三轴蠕变试验 异常值 鲁棒估计 参数辨识 |
| 收稿时间： | 2006-09-18 |
Research on robust identification of rheological parameters of rocks |
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| HAN Bing,WANG Zhi-yin.Research on robust identification of rheological parameters of rocks[J].Rock and Soil Mechanics,2008,29(10):2661-2666. |
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| Authors: | HAN Bing WANG Zhi-yin |
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| Institution: | 1. Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102249, China; 2. R&D Center of PetroChina Pipeline Company, Langfang 065000, China |
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| Abstract: | It is an important method for studying the rheological characteristics of rock to choose an appropriate rheological model and obtain the corresponding parameters based on the triaxial creep experiment of rock in lab.However,there are always a few abnormal values in sample data due to the influence of experiment conditions and random noises;the estimation accuracy may be worse if we use the ordinary least square algorithm to estimate parameters.The robust estimation theory derived from statistics is applied ... |
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| Keywords: | triaxial creep experiment abnormal value robust estimation parameter identification |
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