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首页> 外文期刊>Shock and vibration >Nonlinear Model and Qualitative Analysis for Coupled Axial/Torsional Vibrations of Drill String
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Nonlinear Model and Qualitative Analysis for Coupled Axial/Torsional Vibrations of Drill String

机译：钻柱轴向/扭转耦合非线性模型与定性分析

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摘要

A nonlinear dynamics model and qualitative analysis are presented to study the key effective factors for coupled axial/torsional vibrations of a drill string, which is described as a simplified, equivalent, flexible shell under axial rotation. Here, after dimensionless processing, the mathematical models are obtained accounting for the coupling of axial and torsional vibrations using the nonlinear dynamics qualitative method, in which excitation loads and boundary conditions of the drill string are simplified to a rotating, flexible shell. The analysis of dynamics responses is performed by means of the Runge-Kutta-Fehlberg method, in which the rules that govern the changing of the torsional and axial excitation are revealed, and suggestions for engineering applications are also given. The simulation analysis shows that when the drill string is in a lower-speed rotation zone, the torsional excitation is the key factor in the coupling vibration, and increasing the torsional stress of the drill string more easily leads to the coupling vibration; however, when the drill string is in a higher-speed rotating zone, the axial excitation is a key factor in the coupling vibration, and the axial stress in a particular interval more easily leads to the coupling vibration of the drill string.
机译：提出了非线性动力学模型和定性分析，以研究影响钻柱轴向/扭转振动的关键有效因素，该因素被描述为轴向旋转下的简化，等效，柔性壳体。在此，经过无量纲处理后，使用非线性动力学定性方法获得了考虑轴向和扭转振动耦合的数学模型，其中，将激励载荷和钻柱的边界条件简化为旋转的柔性壳体。动力学响应的分析是通过Runge-Kutta-Fehlberg方法进行的，其中揭示了控制扭转和轴向激励变化的规则，并提供了工程应用建议。仿真分析表明，当钻柱处于低速旋转区域时，扭转激励是耦合振动的关键因素，而增大钻柱的扭转应力更容易导致耦合振动。但是，当钻柱处于较高的旋转区域时，轴向激励是耦合振动的关键因素，并且在特定间隔内的轴向应力更容易导致钻柱的耦合振动。

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  • 来源
    《Shock and vibration》 |2016年第3期|1646814.1-1646814.17|共17页
  • 作者

    Ren Fushen; Wang Baojin; Chen Suli; Yao Zhigang; Bai Baojun;

  • 作者单位

    Northeast Petr Univ, Dept Engn Sci & Mech, Daqing 163318, Heilongjiang, Peoples R China|Missouri Univ Sci & Technol, Dept Petr Engn, Rolla, MO 65401 USA;

    Northeast Petr Univ, Dept Engn Sci & Mech, Daqing 163318, Heilongjiang, Peoples R China;

    Northeast Petr Univ, Dept Engn Sci & Mech, Daqing 163318, Heilongjiang, Peoples R China;

    Northeast Petr Univ, Dept Engn Sci & Mech, Daqing 163318, Heilongjiang, Peoples R China;

    Missouri Univ Sci & Technol, Dept Petr Engn, Rolla, MO 65401 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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