MATEC Web Conf.
Volume 95, 20172016 the 3rd International Conference on Mechatronics and Mechanical Engineering (ICMME 2016)
|Number of page(s)||5|
|Section||Mechanical Design-Manufacture and Automation|
|Published online||09 February 2017|
Random Fatigue Analysis of Drill-Strings in Frequency Domain
1 Department of Mechanical Engineering, Memorial University of Newfoundland, A1B 3X5, St John’s Canada
2 School of Mechanical Engineering, Jiangsu University, 212013, Zhenjiang, Jiangsu, P.R.China
Predicting fatigue damage induced by vibrations is of benefit to oil and gas industry. In this paper a spectral method is developed to estimate the damage of vibration, including both deterministic and random vibration, on the fatigue life of drillstrings. The drill-string is first modeled by the continuous parameter method with two vibration modes: axial and torsional. After the vibration response is obtained, the equivalent stress spectra are calculated for any position along the drill-string, based on maximum shear stress fatigue failure criterion. The fatigue life of the drill-string at arbitrary position is then estimated by the developed spectral methods
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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