单轴压缩下的岩石声发射及其分维特征
首发时间:2008-02-26
摘要:本文通过对几种岩样破裂时声发射数据的分析,研究了声发射参数之间的相互关系,发现岩石本构关系与岩石的声发射之间存在的一种必然联系。通过多种试验参数的图形拟合,分析了声发射活动的规律。将求得的分维和声发射参数随时间的变化曲线进行了对照,结果表明,分维和声发射参数随时间的变化趋势存在相关性。分形维数不仅可以表征声发射的频度,而且分维最小值往往预示着一个大破裂的发生。
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Acoustic emission and fractal dimension of rock under uniaxial compression
Abstract:The relationship of acoustic emission parameters is studied by analyzing the acoustic emission data of several damaging rocks ,and find that the constitutive equation of rock have a certain relationship with acoustic emission.The law of acoustic emission activity is analyzed by many combined parameters in the figure. Fractal dimension and time curve of acoustic emission are compared, the result shows that fractal dimension is related to the complexity of curve of acoustic emission. Not only fractal dimension can token the frequently of acoustic emission, but also the least fractal dimension sometimes indicate that a great cracking will take place.
Keywords: acoustic emission(AE) parameter, damage, damage factor, constitutive equation, fractal dimension
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No.1883416271120398****
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