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基于逆向工程技术的数字化建模方法,通过精细化扫描和数字图像技术对研究对象进行逆向建模,拓取粗糙裂隙表面空间形态,分析粗糙裂隙面三维坐标数据,建立粗糙裂隙试件三维空间模型,实现整个过程的全数字化处理及实体—三维数据—三维模型的转换过程。基于裂隙细观结构渗流过程,对获得的三维裂隙进行渗流数值模拟,开展三维裂隙渗流特性分析,研究粗糙度、开度等因素对于三维粗糙裂隙的渗流特性影响。研究结果显示:在相同开度条件下,裂隙粗糙程度越大,裂隙内平均流速越低,出口处平均流速及渗流量越小;当其它工况条件相同时,渗流的方向对于渗透特性有一定影响。
The digital modeling method based on reverse engineering technology is used to reversely model the research object through meticulous scanning and digital image technology. The spatial morphology of the rough fracture surface is extended. The three-dimensional coordinate data of the rough fracture surface is analyzed. The three-dimensional space model of the rough fracture specimen is established , To achieve the entire process of digital processing and entity - three-dimensional data - three-dimensional model of the conversion process. Based on the seepage process of fissure meso-structure, seepage numerical simulation of the obtained three-dimensional fissure is carried out. The seepage characteristics of the three-dimensional fissure are analyzed and the influence of roughness and opening on the seepage characteristics of three-dimensional rough fissures is studied. The results show that under the same opening condition, the larger the roughness of the crack, the lower the average flow velocity in the fracture and the smaller the average flow velocity and the seepage volume at the exit. When the other conditions are the same, the seepage direction has certain permeability characteristics influences.