A review on dynamic characteristics of blade–casing rubbing

Ma, Hui; Yin, Fanli; Guo, Yuzhu; Tai, Xingyu; Wen, Bangchun

doi:10.1007/s11071-015-2535-x

Cited by 95 publications

(31 citation statements)

References 78 publications

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“…e clearance between the rotor and stator is supposed to be smaller in modern aeroengines to improve the efficiency and power output [1]. As a consequence, the rub-impact between the rotor and stator is more likely to occur, which may cause the economic loss, influence the safety of the engine, and even lead to catastrophic failures [2]. Hence, the evaluation of the rotating machines' condition and the investigation of the rub-impact are always hot topics in research fields.…”

Section: Introductionmentioning

confidence: 99%

Research on Blade‐Casing Rub‐Impact Mechanism by Experiment and Simulation in Aeroengines

Hong

Liang³

et al. 2019

Shock and Vibration

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Aeroengines pursue high performance, and compressing blade-casing clearance has become one of the main ways to improve turbomachinery efficiency. Rub-impact faults occur frequently with clearance decreasing. A high-speed rotor-support-casing test rig was set up, and the mechanism tests of light and heavy rub-impact were carried out. A finite element model of the test rig was established, and the calculation results were in good agreement with the experimental results under both kinds of rub-impact conditions. Based on the actual blade-casing structure model, the effects of the major physical parameters including imbalance and material characteristics were investigated. During the rub-impact, the highest stress occurs at the blade tip first and then it is transmitted to the blade root. Deformation on the impact blade tip generates easily with decreased yield strength, and stress concentration at the blade tip occurs obviously with weaker stiffness. The agreement of the computation results with the experimental data indicates the method could be used to estimate rub-impact characteristics and is effective in design and analyses process.

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Section: Introductionmentioning

confidence: 99%

Research on Blade‐Casing Rub‐Impact Mechanism by Experiment and Simulation in Aeroengines

Hong

Liang³

et al. 2019

Shock and Vibration

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show abstract

“…The clearance between the blade tip and inner casing face has a great influence on compressor efficiency and fuel consumption of aero-engine. To improve the engine performance, one of the modern designs for such improvements aims at minimizing the blade-casing clearance [1]. However, with the decreasing clearance, the rotor and stator are at a high risk of collision which leads to rubbing faults.…”

Section: Introductionmentioning

confidence: 99%

Vibration investigation of rotor system with unbalance and blade-casing rubbing coupling faults

Ding¹,

Wang²,

Lu³

et al. 2020

J. vibroeng.

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In order to investigate the mechanism of a rotor system with unbalance and blade-casing rubbing coupling faults, the vibration and rub force in a rotor system resulting from unbalance and blade-casing rubbing coupling faults are simulated. At first, a dynamic model of 0-2-1 form rotor is established, and a blade-casing model, which considered blade number, clearance between the blade tip and stator, stiffness and size of the blade, is introduced to the rotor model. The characteristics of unbalance and blade-casing rubbing coupling faults are analyzed by waterfall plot, spectrum, time domain chart of vibration and rub force, and the effects of speed and clearance between the blade tip and stator. Secondly, a rotor system tester is established according to the model structure. The experimental test of rubbing is simulated by adjusting the Feeding Device to control the clearance between the blade and stator. After simulation and experimental results were compared, it was found that fraction frequencies and high integer frequencies were affected by a blade-casing rubbing fault, the clearance and speed had different influence on the dynamic characteristic of rotor system with blade-casing rubbing fault.

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“…Friction-induced vibrations (FIV) [1] are ubiquitous in mechanics and unstable FIV are considered a common problem in several fields of engineering, ranging from automotive [2], railways industry [3], aerospace [4][5][6][7] and bioengineering [8,9]. The problem is very widespread as in engineering applications almost all mechanical systems are assembled together and include contacting interfaces, e.g.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental analysis of the bi-stable state for frictional continuous system

et al. 2020

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Unstable friction-induced vibrations are considered an annoying problem in several fields of engineering. Although several theoretical analyses have suggested that friction-excited dynamical systems may experience sub-critical bifurcations, and show multiple coexisting stable solutions, these phenomena need to be proved experimentally and on continuous systems. The present work aims to partially fill this gap. The dynamical response of a continuous system subjected to frictional excitation is investigated. The frictional system is constituted of a 3D printed oscillator, obtained by additive manufacturing that slides against a disc rotating at a prescribed velocity. Both a finite element model and an experimental setup has been developed. It is shown both numerically and experimentally that in a certain range of the imposed sliding velocity the oscillator has two stable states, i.e. steady sliding and stick–slip oscillations. Furthermore, it is possible to jump from one state to the other by introducing an external perturbation. A parametric analysis is also presented, with respect to the main parameters influencing the nonlinear dynamic response, to determine the interval of sliding velocity where the oscillator presents the two stable solutions, i.e. steady sliding and stick–slip limit cycle.

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A review on dynamic characteristics of blade–casing rubbing

Cited by 95 publications

References 78 publications

Research on Blade‐Casing Rub‐Impact Mechanism by Experiment and Simulation in Aeroengines

Research on Blade‐Casing Rub‐Impact Mechanism by Experiment and Simulation in Aeroengines

Vibration investigation of rotor system with unbalance and blade-casing rubbing coupling faults

Numerical and experimental analysis of the bi-stable state for frictional continuous system

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