采用显式动力学中的接触、侵蚀有限元分析方法,对PDC钻头的单齿工作参数变化进行了仿真。当绕钻头中心轴线旋转的单粒PDC切削齿在切削深度为2mm时,研究了具有不同前倾角、侧倾角破岩时切削齿的受力分布及岩石破碎情况。仿真结果较真实地表明了单粒PDC切削齿应力分布、接触压力分布随钻头破岩过程的动态变化情况,为PDC钻头的设计提供了有效的依据。 By using the contact and erosion finite element method in explicit dynamics, the single-tooth working parameters of PDC bit were simulated. When the single-chip PDC cutter rotating around the central axis of the drill bit has a cutting depth of 2mm, the stress distribution and rock breaking of the cutting teeth with different rake and roll angle are studied. The simulation results show the stress distribution and the contact pressure distribution of single-PDC PDC bit more accurately. The dynamic change of the contact pressure distribution with the bit breaking process provides an effective basis for the PDC bit design.