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为了更准确地预测旋挖钻机钻杆的振动特性并减小其振动,在分析钻杆振动机理的基础上,结合能量法和有限元理论,建立了钻杆轴向、横向、扭转耦合振动的动力学模型,采用Newmark-β法仿真分析了钻杆的动力学响应。设计了一种旋挖钻机钻杆减振器,并对减振器的减振效果进行了试验研究。结果表明:钻杆系统的横向振动位移幅值比轴向振动位移幅值大;横向和轴向加速度值的突变说明钻杆与孔壁发生了接触碰撞作用;所设计的钻杆减振器具有良好的减振效果,使轴向减振幅度达到52.1%,y轴和z轴横向减振幅度分别达到63.8%和44.2%。
In order to more accurately predict the vibration characteristics of the drill pipe and reduce its vibration, based on the analysis of the vibration mechanism of the drill pipe, combined with the energy method and the finite element theory, the axial, transverse and torsional coupling vibration of the drill pipe Dynamic model, using the Newmark-β method to simulate the dynamic response of the drill pipe. A drill pipe vibration absorber for rotary drilling rig was designed and the vibration reduction effect of the shock absorber was tested. The results show that the amplitude of lateral vibration displacement of drill pipe system is larger than the amplitude of axial vibration displacement. The abrupt changes of lateral and axial acceleration values indicate that the drill pipe collides with the hole wall. The designed drill rod shock absorber has Good damping effect, the axial damping amplitude reached 52.1%, y-axis and z-axis lateral damping amplitude reached 63.8% and 44.2%.