Contoured shaft and rotor dynamics

Whalley, R.; Abdul-Ameer, A.

doi:10.1016/j.mechmachtheory.2008.04.010

Cited by 13 publications

(6 citation statements)

References 7 publications

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“…Jeon et al 7 developed the rotordynamic model of fuel turbopump and performed the dynamic analysis to predict rotating natural frequencies, critical speeds and system instability. Whalley and Abdual-Ameer 8 considered the dynamics of contoured shaft-rotor system, and resonance and critical speeds are obtained by employing harmonic response techniques. Laxalde et al 9,10 Laxalde and Pierre 11 introduced a new approach for the dynamic behaviour analysis of multi-stage cyclic structures.…”

Section: Introductionmentioning

confidence: 99%

Dynamic characteristics analysis of a dual-rotor system with inter-shaft bearing

Wang

Jiang

2017

Proceedings of the Institution of Mechanical Engineers, Part G:

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The dual-rotor structure is susceptible to vibration, causing the malfunction of the entire operating system. In order to avoid the resonance during operation, it is significant and necessary to conduct modal analysis of such rotors. The dynamic analysis of the full dual-rotor system under operating conditions is also necessary to study dynamic characteristics of the rotating system. In this paper, one-dimension Timoshenko beam-type model, including the effects of gyroscopic moments, rotary inertias, bending and shear deformations, and three-dimension model for dual-rotor system with inter-shaft bearing are developed. Critical speed tests of dual-rotor are carried out to verify the analytical results. Based on the finite element models, the first critical speed excited by inner rotor and the first two critical speeds excited by outer rotor are calculated. The comparisons between both finite element models indicate that 1D model costs less time, which can be used to predict the critical speeds. Good agreement between the theoretical and experimental results shows the accuracy of the FE models. The Campbell diagram, critical speeds, operational deflection shapes and unbalance response of the dual-rotor are obtained to fully study the dynamic characteristics of the dual-rotor system.

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Section: Introductionmentioning

confidence: 99%

Dynamic characteristics analysis of a dual-rotor system with inter-shaft bearing

Wang

Jiang

2017

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…Taplak ve Uzmay [30] dönen mekanik sistemlerin dinamik davranışlarının analizini gerçekleştirmek için bir düz bağlantılı mil sistemi imal etmiş ve farklı işletme şartları için titreşim parametreleri yönünden incelemiştir. Karahan [31] ve Mechefske [32] yapmış oldukları çalışmalarda endüstride kullanılan makinelerde titreşim analizi ile makinelerde arıza teşhisini analiz etmiş, Whalley ve Abdul-Ameer [33] bir mil-yatak sisteminin kritik hızını, dönme frekansını ve rezonansını hesaplamıştır. Kılınç ve Saruhan [34] kaymalı ve yuvarlanmalı yataklarla desteklenmiş millerin farklı yük düzeyleri için kritik hız analizini gerçekleştirmiştir.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Kriyojenik İşlem Uygulanmış Millerin Yuvarlanmalı ve Kaymalı Yataklarda Deneysel Titreşim Analizi

Kam¹,

Saruhan²

2018

Journal of Polytechnic

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“…Whalley and Abdul-Ameer [20], calculated the rotor resonance, critical speed and rotational frequency of a shaft that its, diameter changes by the length, by using basic harmonic response method.…”

Section: Introductionmentioning

confidence: 99%

Plackett-burman desing to study the influence of the stiffness of hydrodynamic bearings on the dynamic behaviour of turbo machinery

Mostefa¹,

Refassi²,

Mimoun³

et al. 2018

MMEP

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Rotating machines are very common in industry.To understand their behaviour is therefore,very important. When considering numerical analysis of such systems, their modelling needsto consider several important effects which are normally disregarded, such as damping and stiffness coefficients associated with the hydrodynamic interactions between the shaft and the supporting bearings. Hydrodynamic bearings play an important role in proper functioning of turbo machinery. They have a direct effect on the dynamic behaviour of this type of machine by adding stiffness to the system. In this paper harmonic analysis of the rotor is done to identify the frequency through the variation of the diameters by design of the optimization (DOE). In the DOE, two levels were used with a total of eleven diameters as parameters and four stiffness factors, which resuted in forty eight runs as per Plakett-Burman design (PBD) plan for answers. Pareto effect graphs and Main effects Plot have been studied to identify the influence of stiffness and the diameters responsible for producing major effects on frequency. We have seen that the stiffness Kyz and the diameters D4 and D10 have an effect on frequency. The results of the confirmatory tests showed that the Plackett-Burman method was very effective in optimizing of rotating machines.

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Contoured shaft and rotor dynamics

Cited by 13 publications

References 7 publications

Dynamic characteristics analysis of a dual-rotor system with inter-shaft bearing

Dynamic characteristics analysis of a dual-rotor system with inter-shaft bearing

Kriyojenik İşlem Uygulanmış Millerin Yuvarlanmalı ve Kaymalı Yataklarda Deneysel Titreşim Analizi

Plackett-burman desing to study the influence of the stiffness of hydrodynamic bearings on the dynamic behaviour of turbo machinery

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