Experimental validation of impact energy model for the rub–impact assessment in a rotor system

Cong, Feiyun; Chen, Jin; Dong, Guangming; Huang, Kun

doi:10.1016/j.ymssp.2011.04.004

Cited by 32 publications

(11 citation statements)

References 22 publications

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“…A new model was developed to simulate the frictional collision contact force between the rotating shell and stator in the rotor system, and the frictional collision contact model was verified. Cong et al [13] proposed an impact energy model for assessing the probability or severity of a rubbing fault. e frictional screw was used to simulate the local rubbing fault, and a rotor-stator friction experiment in the rotor system was conducted.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics and Experimental Research of a Two‐Span Rotor‐Bearing System with Rub‐Impact Fault

Zhu

Wang

Han

et al. 2019

Shock and Vibration

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Rotor rub-impact has a great influence on the stability and safety of a rotating machine. This study develops a dynamic model of a two-span rotor-bearing system with rubbing faults, and numerical simulation is carried out. Moreover, frictional screws are used to simulate a rubbing state by establishing a set of experimental devices that can simulate rotor-stator friction in the rotor system. Through the experimental platform and its analysis system, the rubbing experiment was conducted, and the vibration of the rotor-bearing system before and after the critical speed is observed. Rotors running under normal condition, local slight rubbing, and severe rubbing throughout the entire cycle are simulated. Dynamic trajectories, frequency spectrum diagrams, chart of axis track, and Poincare maps are used to analyze the features of the rotor-bearing system with rub-impact faults under various parameters. The vibration characteristics of rub impact are obtained. Results show that the dynamic characteristics of the rotor-bearing system are affected by the change in velocity and degree of impact friction. The findings are helpful in further understanding the dynamic characteristics of the rub-impact fault of the two-span rotor-bearing system and provide reference for fault diagnosis.

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Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics and Experimental Research of a Two‐Span Rotor‐Bearing System with Rub‐Impact Fault

Zhu

Wang

Han

et al. 2019

Shock and Vibration

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“…The simplest model is based on the use of a restitution coefficient that links the speeds of the rotor before and after the contact [55]. This model assumes that the contact is intermittent and that a significant lapse of time separates two successive contacts.…”

Section: Contact Treatmentmentioning

confidence: 99%

Rotor to stator contacts in turbomachines. Review and application

Jacquet‐Richardet

Torkhani

Cartraud

et al. 2013

Mechanical Systems and Signal Processing

182

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International audienceThe safety of turbomachines requires controlling the risks caused by contacts occurring between fixed and rotating parts. Undesirable phenomena induced by bladed wheel/casing interactions are caused by the forced excitation of the natural modes of a blade leading to its damage or by potentially dangerous couplings between the modes of the casing and those of the wheel. Rotor-stator contacts may also lead to various types of dangerous behavior, including the well known configurations of dry whirl and dry whip. The paper proposes a large-scale literature review and examines existing numerical models and experimental setups used for highlighting the phenomenology involved in different rotor to stator contacts configurations. It confirms the great complexity of the problems which, by nature, are considerably nonlinear and involve multiphysics and multiscale coupled behaviors

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“…Leong and Lim [84] proposed a method that involved wavelet analysis technique to detect blade looseness and monitoring blade pass frequency signals for blade rubbing and cracks identification. Cong et al [85] reported the use of an impact energy model for the evaluation of rotor rub impact fault where spectrum analysis can show a distinctive pattern for different severity states of the blade rub.…”

Section: Blade Rubbingmentioning

confidence: 99%

Condition Monitoring of Blade in Turbomachinery: A Review

Abdelrhman

Hee

Leong

et al. 2014

Advances in Mechanical Engineering

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Blade faults and blade failures are ranked among the most frequent causes of failures in turbomachinery. This paper provides a review on the condition monitoring techniques and the most suitable signal analysis methods to detect and diagnose the health condition of blades in turbomachinery. In this paper, blade faults are categorised into five types in accordance with their nature and characteristics, namely, blade rubbing, blade fatigue failure, blade deformations (twisting, creeping, corrosion, and erosion), blade fouling, and loose blade. Reviews on characteristics and the specific diagnostic methods to detect each type of blade faults are also presented. This paper also aims to provide a reference in selecting the most suitable approaches to monitor the health condition of blades in turbomachinery.

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Experimental validation of impact energy model for the rub–impact assessment in a rotor system

Cited by 32 publications

References 22 publications

Dynamic Characteristics and Experimental Research of a Two‐Span Rotor‐Bearing System with Rub‐Impact Fault

Dynamic Characteristics and Experimental Research of a Two‐Span Rotor‐Bearing System with Rub‐Impact Fault

Rotor to stator contacts in turbomachines. Review and application

Condition Monitoring of Blade in Turbomachinery: A Review

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