Vibration Responses of a Coaxial Dual-Rotor System with Supporting Misalignment

Zhang, Hongxian; Li, Xuejun; Yang, Dalian; Jiang, Lingli

doi:10.3390/app112311219

Cited by 4 publications

(2 citation statements)

References 38 publications

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“…This fault is common due to assembling errors or operation reasons, and it can cause unexpected vibrations and severe consequences [16]. Zhang et al [17] investigated experimentally the dynamic responses of a coaxial dual-rotor system with supporting misalignment, where agreements were found between test results and those of a finite element (FE) model. Yang et al [18] proposed a unified FE model for the full-flexible shaft-disk-drum system where the bolted joints is taking into consideration.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Vibrations of an Uncertain Dual-Rotor Rolling Bearings System with Coupling Misalignment

Yang

et al. 2022

J Nonlinear Math Phys

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In this paper, the nonlinear vibration responses of a dual-rotor system supported on the ball bearings considering coupling misalignment are investigated with inevitable uncertainties included. Moreover, uncertain parameters are modelled by non-probabilistic interval variables, alleviating the hash demands in fitting into a sophisticated probability law. It is then more suited for engineering problems that have sparse prior data on uncertainties. The deterministic vibration responses, orbits and frequency spectrum are provided first to exhibit the evolution of the vibrations. Then, several physical parameters are studied to reveal the effects of their uncertainty on the nonlinear vibrations at different rotating speeds. It is worth noting that uncertainty in the speed ratio between the higher-pressure and lower-pressure rotors has great impacts. Moreover, the sensitivity also depends on the rotating speed.

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Section: Introductionmentioning

confidence: 99%

Nonlinear Vibrations of an Uncertain Dual-Rotor Rolling Bearings System with Coupling Misalignment

Yang

et al. 2022

J Nonlinear Math Phys

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“…* Author to whom any correspondence should be addressed. one of the most significant current discussions in engineering [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamic behavior of a dual-rotor bearing system with coupling misalignment and rubbing faults

Lu¹,

Cheng²,

Zhang³

et al. 2022

Meas. Sci. Technol.

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Taking the dual rotor system in the aero-engine as the research object, the vibration behaviors of the dual rotor bearing system with fault-free, misalignment fault, rub impact fault and misalignment rub impact coupling fault are studied, respectively. Firstly, the three-dimensional model of the dual rotor bearing system is established, and then the first six modes and critical speeds of the dual rotor bearing system are obtained by the finite element method. Then, the dynamic equations of the dual rotor bearing system with fault-free, misalignment fault, rub-impact fault and misalignment rub-impact coupling fault are derived based on the Lagrange method. The Runge-Kutta method is used to solve the dynamic equation, and the nonlinear dynamic response of the system is obtained. The vibration behaviors of the dual rotor system with misalignment fault, rub-impact fault and misalignment rub impact coupling fault are analyzed and discussed through the time history, phase diagram, and frequency spectrum of the rotor. The vibration behaviors of the first six modes of the dual rotor system with fault-free, misalignment fault, rub-impact fault and misalignment rub-impact coupling fault are analyzed, respectively. The results can provide theoretical guidance for structural optimization design of the aero-engine rotor system and the prior decision information for misalignment and rub-impact coupling fault diagnosis.

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Vibration characteristics of bearing-rotor systems with inner ring dynamic misalignment

Yang²,

et al. 2022

International Journal of Mechanical Sciences

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Vibration Responses of a Coaxial Dual-Rotor System with Supporting Misalignment

Cited by 4 publications

References 38 publications

Nonlinear Vibrations of an Uncertain Dual-Rotor Rolling Bearings System with Coupling Misalignment

Nonlinear Vibrations of an Uncertain Dual-Rotor Rolling Bearings System with Coupling Misalignment

Nonlinear dynamic behavior of a dual-rotor bearing system with coupling misalignment and rubbing faults

Vibration characteristics of bearing-rotor systems with inner ring dynamic misalignment

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