Dynamic Response of a Rotating Assembly under the Coupled Effects of Misalignment and Imbalance

In rotating machinery, the second most common fault after imbalance is misalignment. Misalignment can have a severe impact on equipment and may reduce the machine’s lifetime considerably. In this paper, the simultaneous effect of imbalance and misalignment (parallel or angular) on the vibration spec...

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Published in:	Shock and vibration Vol. 2020; no. 2020; pp. 1 - 26
Main Authors:	Gowid, Samer Abdelazim, Renno, Jamil, Sassi, Sadok, Desouki, Mohamed
Format:	Journal Article
Language:	English
Published:	Cairo, Egypt Hindawi Publishing Corporation 2020 Hindawi John Wiley & Sons, Inc Hindawi Limited
Subjects:	Amplitudes Analysis Angular speed Coupling Dynamic response Fault diagnosis Journal bearings Machinery Magneto-electric machines Mathematical models Misalignment Numerical analysis Numerical models Research methodology Rotating machinery Spectrum analysis Vibration
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Abstract	In rotating machinery, the second most common fault after imbalance is misalignment. Misalignment can have a severe impact on equipment and may reduce the machine’s lifetime considerably. In this paper, the simultaneous effect of imbalance and misalignment (parallel or angular) on the vibration spectra of rotating machinery will be discussed. A numerical model is developed and used to obtain the time and frequency responses of the rotor-coupling-bearing system to the simultaneous effect of these faults. The numerical model shows that the imbalance was mainly related to the peak located around 1X, whereas misalignment was linked to the peak around 2X. In addition, the parallel misalignment fault magnifies the 2X amplitude of the displacement response, whereas the response of angular misalignment is captured at the 2X and 4X amplitudes. This study also examines the effects of changing the model’s rotational speed, misalignment level, and coupling type for angular and parallel misalignments.
AbstractList	In rotating machinery, the second most common fault after imbalance is misalignment. Misalignment can have a severe impact on equipment and may reduce the machine’s lifetime considerably. In this paper, the simultaneous effect of imbalance and misalignment (parallel or angular) on the vibration spectra of rotating machinery will be discussed. A numerical model is developed and used to obtain the time and frequency responses of the rotor-coupling-bearing system to the simultaneous effect of these faults. The numerical model shows that the imbalance was mainly related to the peak located around 1X, whereas misalignment was linked to the peak around 2X. In addition, the parallel misalignment fault magnifies the 2X amplitude of the displacement response, whereas the response of angular misalignment is captured at the 2X and 4X amplitudes. This study also examines the effects of changing the model’s rotational speed, misalignment level, and coupling type for angular and parallel misalignments.
Audience	Academic
Author	Sassi, Sadok Renno, Jamil Gowid, Samer Abdelazim Desouki, Mohamed
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Cites_doi	10.1201/9781420009491 10.1177/1461348418821582 10.1016/j.jsv.2012.12.024 10.1016/j.ymssp.2011.11.020 10.1006/jsvi.1994.1405 10.1115/1.3269161 10.1006/jsvi.1995.0407 10.1201/9781420017878 10.1002/9780470903704 10.1016/j.apacoust.2019.05.022 10.1006/jsvi.1994.1406 10.1016/j.jsv.2007.04.008 10.1177/1687814018772908 10.1260/0957-4565.40.1.17 10.1016/j.jsv.2019.03.007 10.17485/ijst/2009/v2i9.11 10.1016/j.jsv.2009.07.014 10.1006/jsvi.2001.3866 10.1201/9781420027792 10.1016/j.matpr.2018.10.178 10.1016/j.apacoust.2017.07.022 10.1016/j.mechmachtheory.2018.03.009 10.1016/j.jsv.2009.03.024 10.1016/j.eswa.2010.04.009
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Copyright	Copyright © 2020 Mohamed Desouki et al. COPYRIGHT 2020 John Wiley & Sons, Inc. Copyright © 2020 Mohamed Desouki et al. This is an open access article distributed under the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. https://creativecommons.org/licenses/by/4.0
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References	22 23 24 B. Badri (30) 2014 25 26 27 28 V. Hariharan (19) 2011; 33 C. B. Gibbons (9) 1976; 40 J. Piotrowski (3) 2006 10 11 12 A. Muszynska (2) 2005 13 14 15 17 18 B. Klebanov (1) 2007 I. Redmond (16) 2007; 40 Ruland Manufacturing Co. (29) 2020 J. Vance (7) 2010 4 5 M. Adams (6) 2010 8 20 21
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SubjectTerms	Amplitudes Analysis Angular speed Coupling Dynamic response Fault diagnosis Journal bearings Machinery Magneto-electric machines Mathematical models Misalignment Numerical analysis Numerical models Research methodology Rotating machinery Spectrum analysis Vibration
Title	Dynamic Response of a Rotating Assembly under the Coupled Effects of Misalignment and Imbalance
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