Rubbing response comparisons between single blade and flexible ring using different rubbing force models

Zeng, Jin; Ma, Hui; Yu, Kun; Guo, Xumin; Wen, Bangchun

doi:10.1016/j.ijmecsci.2019.105164

Cited by 29 publications

(2 citation statements)

References 54 publications

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“…Hou et al [7] investigated the gap of bearing and Hertzian contact exponent under dynamic loads, and the results show that the dynamic loads have differences of vibrational modes to the system at different rotating speeds. Ma et al [8][9][10][11] have obtained much progress in the rub-impact of rotor and analytical methods.…”

Section: Introductionmentioning

confidence: 99%

Misalignment and Rub-Impact Coupling Dynamics of Power Turbine Rotor with Offset Disk

Nan,

Yang,

2024

Applied Sciences

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When the dual rotor system of the aircraft engine is operating, the mass eccentricity of the power turbine rotor and the misalignment of the shaft coupling or the bearing will cause too large vibration of the rotor; this vibration leads to the rub-impact between the rotor and the casing. The power turbine rotor from the dual rotor system is taken as the research object in this paper. Considering the misalignment, the resulting rub-impact faults, the imbalance of rotor and the disk offset, the equation of motion for the system is developed according to the Lagrangian Equation, and then the Range-Kutta Method is adopted to solve the equation. The influence of the key parameters such as the rotating speed, the misalignment angle and the rub-impact clearance on the dynamics of the system is studied; the finite element analysis was carried out to validate the correctness of the theoretical modeling method. The results show that the rub-impact increases the stiffness of the system; the Hopf bifurcation occurs in the misalignment and rub-impact coupling system; the vibrational stability near the half of the switching speed slumps with the increase of the misalignment angle; with increasing of the stiffness, the number of the chaotic zone increases, and the range of the chaos is widening; enlarging the rub-impact clearance is beneficial to reduce the degree of the rub-impact system and enhance the stability of the system.

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Section: Introductionmentioning

confidence: 99%

Misalignment and Rub-Impact Coupling Dynamics of Power Turbine Rotor with Offset Disk

Nan,

Yang,

2024

Applied Sciences

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“…The vibration responses obtained in the developed models are compared against the results from the FE model. Zeng et al [14] studied rub in a single blade-casing system with flexible supports by an (FE) model of two-node Timoshenko beam, and programming two types of algorithm for the contact interface. Different to most of the approaches in the literature, Mokhtar et al [15] studied rub considering a coupled rotor-stator system.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Validation of Experimentally Optimised Parameters Used in a Vibration-Based Machine-Learning Model for Fault Diagnosis in Rotating Machines

Espinoza-Sepulveda

Sinha

2021

Machines

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Mathematical models have been widely used in the study of rotating machines. Their application in dynamics has eased further research since they can avoid time-consuming and exorbitant experimental processes to simulate different faults. The earlier vibration-based machine-learning (VML) model for fault diagnosis in rotating machines was developed by optimising the vibration-based parameters from experimental data on a rig. Therefore, a mathematical model based on the finite-element (FE) method is created for the experimental rig, to simulate several rotor-related faults. The generated vibration responses in the FE model are then used to validate the earlier developed fault diagnosis model and the optimised parameters. The obtained results suggest the correctness of the selected parameters to characterise the dynamics of the machine to identify faults. These promising results provide the possibility of implementing the VML model in real industrial systems.

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Experimental Study on Internal Friction Induced Vibrations of a High-Speed Turbine Rotor-Bearing System

Guo²,

Liu

et al. 2021

Lecture Notes in Electrical Engineering

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Rubbing response comparisons between single blade and flexible ring using different rubbing force models

Cited by 29 publications

References 54 publications

Misalignment and Rub-Impact Coupling Dynamics of Power Turbine Rotor with Offset Disk

Misalignment and Rub-Impact Coupling Dynamics of Power Turbine Rotor with Offset Disk

Mathematical Validation of Experimentally Optimised Parameters Used in a Vibration-Based Machine-Learning Model for Fault Diagnosis in Rotating Machines

Experimental Study on Internal Friction Induced Vibrations of a High-Speed Turbine Rotor-Bearing System

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