Nonlinear Model and Qualitative Analysis for Coupled AxialTorsional Vibrations of Drill String
Joint Authors
Bai, Bao-jun
Ren, Fushen
Wang, Baojin
Chen, Suli
Yao, Zhigang
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-01-13
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Abstract EN
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.
American Psychological Association (APA)
Ren, Fushen& Wang, Baojin& Chen, Suli& Yao, Zhigang& Bai, Bao-jun. 2016. Nonlinear Model and Qualitative Analysis for Coupled AxialTorsional Vibrations of Drill String. Shock and Vibration،Vol. 2016, no. 2016, pp.1-17.
https://search.emarefa.net/detail/BIM-1118813
Modern Language Association (MLA)
Ren, Fushen…[et al.]. Nonlinear Model and Qualitative Analysis for Coupled AxialTorsional Vibrations of Drill String. Shock and Vibration No. 2016 (2016), pp.1-17.
https://search.emarefa.net/detail/BIM-1118813
American Medical Association (AMA)
Ren, Fushen& Wang, Baojin& Chen, Suli& Yao, Zhigang& Bai, Bao-jun. Nonlinear Model and Qualitative Analysis for Coupled AxialTorsional Vibrations of Drill String. Shock and Vibration. 2016. Vol. 2016, no. 2016, pp.1-17.
https://search.emarefa.net/detail/BIM-1118813
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1118813