Modeling and dynamic characteristic analysis of dual rotor-casing coupling system with rubbing fault

Autor: Bingqiang Li, Honggen Zhou, Jinfeng Liu, Chao Kang
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Journal of Low Frequency Noise, Vibration and Active Control, Vol 41 (2022)
Druh dokumentu: article
ISSN: 1461-3484
2048-4046
14613484
DOI: 10.1177/14613484211039322
Popis: With the rapid development of aero-engine manufacturing technology, the dual-rotor system has been employed in part of turbofan engine in order to improve the working performance of aircraft more efficiently. In this study, taking the counter-rotation dual-rotor as the research object, the dynamic model of dual rotor-casing coupling system is established by the aid of MATLAB. The dynamic frequency curves are in good agreement with the results in references and calculated by FEM method, that shows the validity and feasibility of the model. The local rub-impact dynamic model of dual rotor-casing coupling system is established, and rubbing analysis is carried out using Newmark- β method. The effects of rotating speed and speed ratio on local rub-impact response are deeply discussed. The results show that with the increase of rotating speed, combined frequencies and frequency multiplication components are more significant. In addition, speed ratio has a great influence on the periodic motion of the system. With the increase of the absolute value of the speed ratio, the whirl radius of the outer rotor and the normal rubbing force increase dramatically.
Databáze: Directory of Open Access Journals
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