梅琦，王杰，罗庆怡，李何钰秋，董杰

[摘    要]为研究旋挖钻进过程中钻削参数对钻削轴向力的影响，利用有限元分析软件LS-DYNA对单个截齿钻削岩石的过程进行仿真模拟。采用单因素试验方法，以主轴转速与进给速度为设计变量，得到钻削轴向力与主轴转速、进给速度的变化曲线。结果表明：轴向力随主轴转速的增大而减小，随进给速度的增大而增大。研究结果可为旋挖钻头截齿的分布和实际钻削破岩时选择合理的钻削参数提供一定的依据。

[关键词]截齿;LS-DYNA;破岩仿真;钻削轴向力

[中图分类号]TG54 [文献标志码]A [文章编号]2095–6487（2022）02–00–03

Simulation Research on Rock Breaking Drilling Force of Pick Based on LS-DYNA

Mei Qi，Wang Jie，Luo Qing-yi，Li Heyu-qiu，Dong Jie

[Abstract]In order to study the influence of drilling parameters on the drilling axial force in the process of rotary drilling， the process of drilling rock with a single pick is simulated by using the finite element analysis software LS-DYNA. Using the single factor test method and taking the spindle speed and feed speed as the design variables， the variation curves of drilling axial force， spindle speed and feed speed are obtained. The results show that the axial force decreases with the increase of spindle speed and increases with the increase of feed speed. The research results can provide a certain basis for the distribution of rotary bit pick and the selection of reasonable drilling parameters in actual rock breaking drilling.

[Keywords]pick; LS-DYNA; rock breaking simulation; drilling axial force

随着经济的发展，各类高压输电线路工程的需求日益增大，而基础性建设是输电线路工程的根基。桩基础因具有承载力高、抗倾覆能力与抗拔抗压能力强、适用条件广泛等优点成为现阶段使用最广泛的基础形式之一。实际钻孔灌注桩常采用旋挖钻机，一个旋挖钻机的钻头有许多截齿，破岩时由钻头带动各个截齿进行切削，而现有的关于旋挖破岩的研究较少。冯杰等[1]利用有限元分析软件ABAQUS对TC4钛合金薄壁件钻削加工过程进行动态仿真，获得钻削加工过程中钻削参数对钻削力的影响规律，但研究对象为钛合金薄壁件。柳波等[2]基于岩石力学理论建立了钻机筒钻单齿切削岩石过程的物理模型，应用离散元软件EDEM仿真分析出切削深度和切削速度对单齿切削力的影响规律，但该文将模型简化为单齿沿直线对岩石进行切削，非钻削工况。……