An experimental study on the nonlinear vibration phenomenon of a rotor system subjected to barrel roll flight and coupled rub-impact faults

Gao, Tian; Cao, Shuqian; Hou, Lanlan; Hou, Yuanhang

doi:10.1016/j.measurement.2019.107406

Cited by 27 publications

(11 citation statements)

References 28 publications

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“…Based on the vibration spectrum, we found that "the basic power spectra are not generally informative in Fig. 4, partly because they are in the presence of strong masking signals from other machine components but also because the angle of the load from the radial plane varies with the position of each rolling element in the bearing as the ratio of the local radial to the axial load changes" [31,32]. It should be noted that the uncertainty of the bearing signals is the main characterization to bearing signals, because it always exists and changes from the beginning of health signals to the formation of fault signals.…”

Section: Adata Collectionmentioning

confidence: 99%

Tapered Roller Bearing Failure Diagnosis Based on Improved Probability Box Model

Tang

Dai

2020

IEEE Access

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Bearing failure often occurs in rotating machinery. The fault diagnosis method based on the vibration signals has been studied for many years. This paper proposed an improved probability box (ip-box) modeling method for diagnosing bearing faults. The major theoretical principles involved with the probability box (p-box) modeling methods and a projection method. Since a larger aggregated width results in the p-box not being conducive to a fault identification and diagnosis, the mean of the focal element interval and the amount of data fluctuation between the adjacent focal elements were used as additional information. Then, the additional information was added to the ip-box model by the cooperative optimization method. Finally, the experimental results showed that the classification performance of a support vector machine (SVM) trained with eight measured values from the ip-box was significantly improved.

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Section: Adata Collectionmentioning

confidence: 99%

Tapered Roller Bearing Failure Diagnosis Based on Improved Probability Box Model

Tang

Dai

2020

IEEE Access

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“…It has been recognized that rub-impact originates from a very small tip clearance between the stationary and rotating parts in an operating aero-engine [26]. If the clearance can be systematically controlled, the rub-impact might be effectively mitigated or eliminated.…”

Section: Introductionmentioning

confidence: 99%

Study on a Fault Mitigation Scheme for Rub-Impact of an Aero-Engine Based on NiTi Wires

Pan

Liu³

et al. 2022

Sensors

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The aim of this study was to solve the frequently occurring rotor-stator rub-impact fault in aero-engines without causing a significant reduction in efficiency. We proposed a fault mitigation scheme, using shape memory alloy (SMA) wire, whereby the tip clearance between the rotor and the stator is adjusted. In this scheme, an acoustic emission (AE) sensor is utilized to monitor the rub-impact fault. An active control actuator is designed with pre-strained two-way SMA wires, driven by an electric current via an Arduino control board, to mitigate the rub-impact fault once it occurs. In order to investigate the feasibility of the proposed scheme, a series of tests on the material properties of NiTi wires, including heating response rate, ultimate strain, free recovery rate, and restoring force, were carried out. A prototype of the actuator was designed, manufactured, and tested under various conditions. The experimental result verifies that the proposed scheme has the potential to mitigate or eliminate the rotor-stator rub-impact fault in aero-engines.

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“…They also find that the response of the system subject to two frequencies has abundant nonlinear behaviours such as jump phenomena due to saddle-node bifurcation, second Hopf bifurcation and quasi-periodic motion. Moreover, the amplitude jumping and bistable phenomenon [17][18][19] also exist in the responses of a rotor-bearing system with squeeze-film dampers (SFDs), Gao et al 20,21 proposed a mathematical model of a flexible asymmetric aero-engine rotor system in manoeuvring flight, and it was found that the responses of the rotor show clear nonlinear characteristics such as bistable, amplitude jumping phenomenon and nonsynchronous vibration. Chen et al [22][23][24] derived the dynamic model of a rotor system supported by the squeeze film damper during an aircraft turning manoeuvre, and the nonlinear vibration behaviours of rotor systems are investigated.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamics of the rotor system with a floating raft isolation structure under the coupled motion of ship heaving and rolling

Xie

Wang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part K:

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A floating raft isolation structure is adopted to reduce the vibration of the marine rotor-bearing system, however, the system on the moving hull will be affected by the ship implicate motion, and its vibration will be difficult to predict. In this study, a dynamic model of the system under heaving and rolling coupled motion is established after considering the nonlinear oil film reaction force, unbalance inertia force, restoring force of the structure and inertia force of the ship motion. A numerical method is introduced to present the responses of the system, such as the amplitude and rotating speed curve, waterfall diagrams, and the rotor orbit and its Poincaré maps, etc. Moreover, the effects of rotating speed, amplitudes and frequencies of the coupled motion on the dynamic behaviours of the system are studied. The results indicate that the unstable region of rotating speed of the system increases under the coupled motion, the vibration of the system is greatly affected by the parameters of coupled motion, and the vibration amplitudes of rotor and raft can be effectively limited due to the displacement restrictor.

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An experimental study on the nonlinear vibration phenomenon of a rotor system subjected to barrel roll flight and coupled rub-impact faults

Cited by 27 publications

References 28 publications

Tapered Roller Bearing Failure Diagnosis Based on Improved Probability Box Model

Tapered Roller Bearing Failure Diagnosis Based on Improved Probability Box Model

Study on a Fault Mitigation Scheme for Rub-Impact of an Aero-Engine Based on NiTi Wires

Nonlinear dynamics of the rotor system with a floating raft isolation structure under the coupled motion of ship heaving and rolling

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