| 用图像处理方法研究非均质材料的声发射 |
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| 引用本文： | 逄焕东,姜福兴,张兴民.用图像处理方法研究非均质材料的声发射[J].岩土力学,2005,26(5):795-798. |
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| 作者姓名： | 逄焕东 姜福兴 张兴民 |
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| 作者单位： | 1. 山东科技大学,土木建筑学院,山东,泰安,271019
2. 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： | 国家自然科学基金重大国际合作项目(No.50320120001)，国家自然科学基金项目(No.50074021)。 |
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| 摘 要： | 根据几种不同强度单元的分布构造材料，依据图形变化与受外荷载的亮度对应关系，讨论了材料的受力变化。用图形亮度表示不同均质程度岩石单元的受力、破坏和声发射状态，结果表明：声发射模式与所取门槛值有很大关系。不同检测门槛值得到的声发射模式可能不同，通常情况下，材料在接近破坏时声发射的能量会增加很多倍，所以，采用较大门槛值检测声发射事件，并预测岩石的破裂具有可行性。
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| 关 键 词： | 变分原理 声发射 非均质性 图形矩阵 |
| 文章编号： | 1000-7598-(2005)05-0795-04 |
| 收稿时间： | 2004-02-02 |
| 修稿时间： | 2004年2月2日 |
Study on acoustic emission of non-homogeneous material by image processing method |
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| PANG Huan-dong,JIANG Fu-xing,ZHANG Xing-min.Study on acoustic emission of non-homogeneous material by image processing method[J].Rock and Soil Mechanics,2005,26(5):795-798. |
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| Authors: | PANG Huan-dong JIANG Fu-xing ZHANG Xing-min |
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| Institution: | 1. School of Civil Engineering and Architecture, Shandong University of Science & Technology, Tai’an 271019; 2. School of Civil and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083 |
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| Abstract: | Some artificial materials were constructed according to a types of different element strength distribution, and then the inner state of the material had been discussed in line to the relationship between change of image and exterior force. By element's lightness indicating the value of inner force, breakage and acoustic emission (AE), it suggested that the AE had close relationship to the chosen critical value. Different detect critical value led to different AE mode. Usually the energy emission would become stronger when the rock mass was going to break, so it was feasible to check AE and predict rock mass' breakage by larger critical value. |
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| Keywords: | variational principle acoustic emission non-homogenization image matrix |
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