单轴压缩条件下饱水粉砂岩红外温度场的分形特征研究

为探寻单轴压缩下饱水粉砂岩破裂过程中的红外辐射特性,引入分形理论,通过盒维数法计算出饱水粉砂岩红外温度场的分形维数,结合方差对单轴压缩下饱水粉砂岩的分形特征进行分析。结果表明:红外温度场的分形维数不仅能够表征饱水粉砂岩变形过程中裂纹发育的几何特征,同时也体现了裂纹发育过程中的动力学特征;较方差而言,分形维数对岩石加载过程的红外温度场变化更为敏感;分形维数在弹性阶段以及表征饱水粉砂岩试样破裂的红外前兆方面刻画效果优于方差。

Study on Fractal Characteristics of Infrared Temperature Field of Saturated Sandstone under Uniaxial Compression

In order to study the infrared radiation characteristics of the saturated sandstone during the uniaxial compression, the fractal dimension of the infrared temperature field of the saturated sandstone is calculated by the box dimension method. The fractal dimension of the saturated temperature field of the saturated sandstone Fractal characteristics. The results show that the fractal dimension of the infrared temperature field can not only characterize the geometric characteristics of the crack development during the deformation process of the saturated sandstone, but also the dynamic characteristics of the crack development process. In terms of variance, the fractal dimension is the rock loading process The fractal dimension is better than the variance in the elastic phase and the infrared precursors that characterize the rupture of the saturated sandstone specimen.