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根据硬岩的物理特性,结合短螺旋钻的切削原理,通过建立随机载荷数学模型,对短螺旋钻切削硬岩过程进行有限元分析。利用Matlab软件计算了不同接触强度下短螺旋钻的扭矩和轴向力分布,预测了短螺旋钻的载荷。基于ANSYS软件对硬岩钻进过程进行有限元分析,研究了不同切削深度下的硬岩的等效应力分布。研究表明:相同切削厚度下,硬岩的等效应力随着切削深度增加而变大。
According to the physical characteristics of hard rock and the cutting principle of short auger, the finite element analysis of the short auger cutting hard rock process is established by establishing a mathematical model of random loading. The torque and axial force distribution of short auger under different contact strengths were calculated by Matlab software and the short auger load was predicted. Based on the ANSYS software, the finite element analysis of the hard rock drilling process was conducted and the equivalent stress distribution of the hard rock under different cutting depths was studied. The results show that the equivalent stress of hard rock increases with the depth of cut at the same cutting thickness.