Journal ArticleDOI
Coupling misalignment in rotating machines: modelling, effects and monitoring
G.N.D.S. Sudhakar,A. S. Sekhar +1 more
TLDR
In this article, the authors explore the research on coupling misalignment by briefly summarizing the research work done so far on different modelling techniques, effects on the system behaviour, fault identification and condition monitoring techniques.Abstract:
After unbalance, coupling misalignment is the most common fault present in rotating machines. However, limited research has been carried out on coupling misalignment and its effects. The present study aims to explore the research on coupling misalignment by briefly summarizing the research work done so far on different modelling techniques, effects on the system behaviour, fault identification and condition monitoring techniques.read more
Citations
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Journal ArticleDOI
Vibration signatures of a rotor-coupling-bearing system under angular misalignment
TL;DR: In this paper, a comparison between two approaches for modeling the forces and moments generated by a metallic disc coupling under angular misalignment is presented, where a well-established model based on the linear bending flexure of the disc packs is proposed.
Journal ArticleDOI
Detection and monitoring of coupling misalignment in rotors using torque measurements
TL;DR: In this paper, Fourier and wavelet transforms are used to detect the misalignment in rotating machinery shafts at different frequency of operation and the variation of the fault characteristics with respect to time are reported for sampled signals using wavelet transform.
Journal ArticleDOI
Current Signature and Vibration Analyses to Diagnose an In-Service Wind Turbine Drive Train
Estefania Artigao,Sofia Koukoura,Andrés Honrubia-Escribano,James Carroll,Alasdair McDonald,Emilio Gómez-Lázaro +5 more
TL;DR: The diagnosis is achieved through spectral analysis of the stator currents, where fault frequency components related to rotor mechanical unbalance are identified and can be implemented in condition monitoring strategies, which is of great interest to optimise operation and maintenance costs of wind farms.
Journal ArticleDOI
Feature extraction method based on NOFRFs and its application in faulty rotor system with slight misalignment
TL;DR: A new method, named variable weighted contribution rate of NOFRFs, is proposed, which enhances the ratio of high-order output frequency response to total output response of a rotor system and proposes a new index MR, which is more sensitive for the slight misalignment rotor system.
Journal ArticleDOI
Model based analysis and identification of multiple fault parameters in coupled rotor systems with offset discs in the presence of angular misalignment and integrated with an active magnetic bearing
TL;DR: In this paper, the effect of angular misalignment in a rotor-train-AMB system with two 4-dof simple rotors, each with an offset disc to have gyroscopic effects, is quantified by way of estimation of additive coupling stiffness.
References
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Book
Rotordynamics prediction in engineering
Michel Lalanne,Guy Ferraris +1 more
TL;DR: In this paper, the authors present a simple model of a simple rotor with three disc bearing elements for industrial applications and derive the minimum shaft radius branched systems in torsion analysis for industrial electric motor centrifugal compressor unit.
BookDOI
Dynamics of rotors and foundations
TL;DR: In this article, the one degree of freedom system is described in detail, including the Short and the Long Rotors, with oil-film bearing and rolling-element bearing, as well as the Shaft Seals and non-circular Shafts.
Journal ArticleDOI
Vibration Analysis Of A Motor-Flexible Coupling-Rotor System Subject To Misalignment And Unbalance, Part I: Theoretical Model And Analysis
M. Xu,R.D. Marangoni +1 more
TL;DR: In this paper, a theoretical model of a complete motor-flexible coupling-rotor system capable of describing the mechanical vibration resulting from misalignment and unbalance was developed.
Journal ArticleDOI
Effects of coupling misalignment on vibrations of rotating machinery
A. S. Sekhar,B.S. Prabhu +1 more
TL;DR: In this paper, the rotor bearing system is modelled using higher order finite elements by considering deflection, slope, shear force, bending moment with eight degrees of freedom per node.
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Effects of coupling misalignment on vibrations of rotating machinery
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Vibration Analysis Of A Motor-flexible Coupling-Rotor System Subject To Misalignment And Unbalance, Part II: Experimental Validation
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