中国工程机械学报

截齿作为旋挖钻机的破岩刀具，为了提升其截割性能，需对截齿布置形式进行性能分析与结构参数优化。基于离散元法和响应面试验设计原理研究岩石单轴压缩强度与其材料的本构模型参数关系，确定4种典型岩层的离散元参数标定结果。基于截齿截割性能的多目标评价模型探究2种截齿布置形式与岩石强度的匹配关系，揭示截齿的截割性能，并对截齿布置形式的倾角、偏斜角和齿间距3个关键结构参数进行优化。研究结果表明：软岩地层中径向布置截齿的截割性能较好，硬岩地层中周向布置截齿形式的截割性能较好；径向截齿布置形式截齿倾角取45°，齿间距取56 mm时截割性能最好，周向截齿布置形式的截齿倾角取30°，截齿偏斜角取18°时截割性能最好。本研究可为不同岩层下旋挖钻机截齿布置形式的设计提供参考。

As a cutting tool of rotary drilling rig,the pick teeth need to be analyzed for its cutting performance,and the structural parameters need to be optimized. Based on the discrete element method and response surface experimental design principle,the relationship between the uniaxial compressive strength of rock and its material constitutive model parameters is studied to determine the calibration results of discrete element parameters for four typical rock layers. A multi-objective evaluation model of tooth cutting performance is explored to reveal the cutting performance of the tooth and optimize the inclination angle,skew angle,and tooth spacing of the tooth arrangement. The research results show that the radial arrangement of teeth performs better in soft rock formations,while the circumferential arrangement of teeth performs better in hard rock formations. The cutting performance is best when the radial tooth arrangement has an inclination angle of 45° and a tooth spacing of 56 mm,while the circumferential tooth arrangement has an inclination angle of 30° and a skew angle of 18°. This study can provide reference for the design of tooth arrangement for rotary drilling rigs in different rock formations.