Friction failure dynamics modeling analysis of aero-engine dual rotor system

Mingchao Xie; Qihao Liu; Wei Yan

doi:10.1117/12.3046600

27 September 2024 Friction failure dynamics modeling analysis of aero-engine dual rotor system

Mingchao Xie, Qihao Liu, Wei Yan

Proceedings Volume 13261, Tenth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2024); 1326150 (2024) https://doi.org/10.1117/12.3046600
Event: 10th International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2024), 2024, Wuhan, China

Abstract

Modern aero engines often utilize a dual-rotor structure composed of high-pressure and low-pressure rotors. During the operation of these dual-rotor systems, there is a potential for friction failure between the rotor and stator, which can exacerbate vibrations, create additional excitations, and compromise engine safety. In this study, a comprehensive dynamic model encompassing high-pressure rotors, low-pressure rotors, rolling bearings, and the casing was developed for a realistic aero-engine dual-rotor system. This model accounts for various factors, including rotor unbalance excitation, nonlinear Hertzian contact forces, variable flexibility, rolling bearing dynamics, and friction collision non-linearity. The numerical integration method was employed to solve the system response, facilitating dynamic analysis. Findings indicate that friction collision induces system response frequencies characterized by frequency doubling, combination frequencies, and frequency division, markedly distinct from those without friction collision. These frequencies can serve as diagnostic indicators for friction faults in dual-rotor systems. This research offers a theoretical foundation for analyzing the mechanisms and extracting fault characteristic parameters associated with aero-engine dual-rotor system collision failures, contributing significantly to enhancing engine safety and reliability.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Mingchao Xie, Qihao Liu, and Wei Yan "Friction failure dynamics modeling analysis of aero-engine dual rotor system", Proc. SPIE 13261, Tenth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2024), 1326150 (27 September 2024); https://doi.org/10.1117/12.3046600

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KEYWORDS

Vibration

Frequency response

Failure analysis

Modeling

Systems modeling

Reliability

Analytical research

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