| 岩石声发射Kaiser点信号频带能量分布和分形特征研究 |
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| 引用本文： | 赵奎,王更峰,王晓军,金解放,邓飞.岩石声发射Kaiser点信号频带能量分布和分形特征研究[J].岩土力学,2008,29(11):3082-3088. |
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| 作者姓名： | 赵奎 王更峰 王晓军 金解放 邓飞 |
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| 作者单位： | 1. 江西理工大学,环境与建筑工程学院,江西,赣州,341000
2. 江西理工大学,环境与建筑工程学院,江西,赣州,341000;北京科技大学,土木与环境工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金
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江西省教育厅科技计划
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| 摘 要： | 通过单轴加载岩石破坏全过程声发射试验,根据Kaiser效应原理采用参数法确定了Kaiser点.在此基础上,首先采用小波包频带分解方法,对岩石声发射Kaiser点信号的能量分布特征进行了研究,分析了砂岩声发射信号的不同频带能量分布规律,得到了Kaiser点特征频带能量百分比大于相邻点的重要结论.其次,采用G-P算法计算了声发射过程关联分维数,结果表明声发射过程不仅具有分形特征,而且Kaiser点声发射信号关联分维数小于其相邻点,其结论可作为通过波形分析识别Kaiser点的特征.
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| 关 键 词： | 岩石声发射 Kaiser效应 能量分布 小波包分析 关联分形维数 |
| 收稿时间： | 2007-06-18 |
Research on energy distributions and fractal characteristics of Kaiser signal of acoustic emission in rock |
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| ZHAO Kui,WANG Geng-feng,WANG Xiao-jun,JIN Jie-fang,DENG Fei.Research on energy distributions and fractal characteristics of Kaiser signal of acoustic emission in rock[J].Rock and Soil Mechanics,2008,29(11):3082-3088. |
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| Authors: | ZHAO Kui WANG Geng-feng WANG Xiao-jun JIN Jie-fang DENG Fei |
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| Institution: | 1. Faculty of Environment and Architectural Engineering, Jiangxi Univesity of Science and Technology, Ganzhou 341000, China; 2. School of Civil and Environmental Engineering, University of Science and technology Beijing, Beijing 100083, China |
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| Abstract: | Acoustic emission tests of sandstone specimens under uniaxial compression are carried out; and Kaiser point is determined by parameter method according to the principle of Kaiser effect. First, based on the above testing results, the energy distribution of acoustic emission signals is studied by means of the wavelet packet analysis technique; and regularity of energy distributions for different frequency bands is analyzed. The results show that the energy percentage of dominant frequency band at Kaiser poin... |
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| Keywords: | acoustic emission in rock Kaiser effect energy distribution wavelet packet analysis relevant fractal dimension |
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