用图像处理方法研究非均质材料的声发射

英文篇名：Study on acoustic emission of non-homogeneous material by image processing method
中文刊名：岩土力学
英文刊名：Rock and Soil Mechanics
作者：逄焕东 ; 姜福兴 ; 张兴民
英文作者：PANG Huan-dong1 ; JIANG Fu-xing2 ; ZHANG Xing-min1 (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)
中文关键词：变分原理 ; 声发射 ; 非均质性 ; 图形矩阵
英文关键词：variational principle ; acoustic emission ; non-homogenization ; image matrix
出版日期：2005-05-30
机构：山东科技大学土木建筑学院,北京科技大学土木与环境工程学院,山东科技大学土木建筑学院山东泰安271019 ,北京100083 ,山东泰安271019
年：2005
期：05
出版单位：岩土力学

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。
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.

引文

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