两条粗糙平行节理表面形貌对应力波能耗的影响研究

发布时间：2019-01-01 10:10

【摘要】：基于图形图像学与分形几何交叉学科理论,提出了一种用于描述节理面形貌的新方法—YUV维数法,该方法可替代传统分形维数且有其优势。在此基础上,通过对含两条粗糙平行节理岩石的SHPB试验,探讨了两条节理面形貌(以YUV维数描述)对应力波能耗的影响规律。研究结果表明:YUV维数法是一种新型表面描述方法,相对传统自相似图像维数有其优势;当两条节理YUV维数或节理YUV维数之和增大时,节理能耗值随之增加。出现上述现象的机理是:当节理面YUV维数增大时,岩石节理刚度相应减小,导致应力波穿越节理的能力降低,造成应力波能量耗散值增大。另外,能耗与YUV维数间呈现一种非线性关系,这种非线性关系是由节理的非线性变形所引发。为了工程应用之目的,同时给出了能耗与两条节理YUV维数间的二元函数关系。
[Abstract]:Based on the cross discipline theory of graphics and fractal geometry, a new method, YUV dimension method, is proposed to describe the morphology of joint surface. This method can replace the traditional fractal dimension and has its advantages. Based on the SHPB test of rock with two rough parallel joints, the influence of the shape of two joints (described by YUV dimension) on the energy consumption of force wave is discussed. The results show that the YUV dimension method is a new surface description method, which has advantages over the traditional self-similar image dimension, and when the sum of YUV dimension or YUV dimension of two joints increases, the joint energy consumption increases. The mechanism of the above phenomenon is that when the YUV dimension of the joint plane increases, the stiffness of rock joint decreases accordingly, which results in the decrease of the ability of the stress wave to cross the joint and the increase of the energy dissipation value of the stress wave. In addition, there is a nonlinear relationship between energy consumption and YUV dimension, which is caused by the nonlinear deformation of joints. For the purpose of engineering application, the binary function relationship between energy consumption and YUV dimension of two joints is also given.
【作者单位】：湖北文理学院建筑工程学院;南洋理工大学土木与环境工程学院;同济大学土木工程学院;
【基金】：国家自然科学基金面上项目(51374100) 湖北省教育厅科学技术研究计划重点项目(D20142603)
【分类号】：TU45

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