燕山大学学报2017，Vol.41Issue(3)：240-245,6.DOI:10.3969/j.issn.1007-791X.2017.03.007
钻杆纵-扭耦合振动两自由度模型的动力学分析
Dynamics analysis of couple axial-torsional vibrations of drill-strings with two degrees of freedom
摘要
Abstract
Nonlinear dynamics of drill-strings is presented based on a 2DOF model which considers the coupling between axial and torsional vibrations and a simplified contact model in this paper.Both the averaging method and the numerical method are simultane-ously used to investigate the influence of parameters in the governing equation such as rotation speed at the surface and friction efficient.It is found from the analytical results that both the variations of frequency with amplitudes and the variations of amplitude with rotation speed at the surface and friction coefficient are non-linear for harmonic motions. It is observed from the simulation results that the amplitudes of stick-slip motions with shorter stick time are larger for higher rotary speed and the stick time in stick-slip motions are longer for larger friction coefficient.关键词
钻杆/纵-扭耦合振动/非线性动力学/粘滑振动/数值仿真Key words
drill-strings/coupled axial-torsional vibration/nonlinear dynamics/stick-slip vibration/numerical simulation分类
数理科学引用本文复制引用
韩善凯,李欣业,侯书军,陈涛..钻杆纵-扭耦合振动两自由度模型的动力学分析[J].燕山大学学报,2017,41(3):240-245,6.基金项目
河北省高层次人才资助项目( C201400309) （ C201400309）
