利用钻柱动力学有限元模型的数值计算方法 ,在考虑了钻头与岩石互作用力学模型的基础上 ,建立了钻头和钻柱扭转振动动力学仿真模型。通过仿真计算可预测钻头处阻力扭矩、钻柱顶部扭矩和钻头转速的变化情况。对 8 英寸XHP2S钻头做了仿真 ,结果表明 ,钻头处受岩石的阻力扭矩是随机变化的 ,并有负扭矩出现 ,扭矩的变化幅值随静钻压的增加而增加 ;钻柱顶部转盘施加的扭矩变化不如底部剧烈 ;钻头的转速在局部有较小的波动 ,其总体变化较为平缓。 Based on the numerical calculation method of the dynamic finite element model of drill string, the torsional vibration dynamic simulation model of drill bit and drill string was established on the basis of considering the interaction model between drill bit and rock. Through the simulation calculation can predict the drill bit torque at the top of the drill string torque and bit speed changes. The simulation results of 8-inch XHP2S drill bit show that the resistance torque at the drill bit varies randomly with negative torque, and the amplitude of torque increases with the increase of the static drilling pressure. The torque variation is not as dramatic as the bottom; the bit speed has small fluctuations locally, and its overall change is relatively flat.