砂岩全应力应变试验曲线阶段特征的Kolmogorov熵分析

Research on stage features of sandstone specimens by Kolmogorov entropy method

应用K o lm ogorov熵评价准则,进行砂岩全应力应变曲线阶段特征的非线性动力学研究,定量描述了峰前、峰后和全程三个层次的分段特征。通过与功率谱分析结论的比较研究,得出砂岩全应力应变曲线阶段特征的K o lm ogorov熵分析具有高度的可靠性,是对功率谱分析方法的科学验证与有益补充,开辟了岩石全应力应变曲线分段特征定量研究的新途径,具有一定的理论意义。

Stage features of sandstone specimens are studied by a nonlinear dynamics method of Kolmogorov entropy. Comparing research results from power spectra and Kolmogorov entropy to three stages of forepart, rear part and whole process of strain-stress curves, the paper finds that Kolmogorov entropy method is satisfied even more. The method produces a new approach to value system state quantitatively and is a good supplement to power spectra method. Conclusions of the paper have theoretical sense to nonlinear dynamics.