Vibration characteristics of rotor systems with disk-shaft clearance

Li, Zhinong; Qiao, Fang; Li, Yunlong; Chen, Shiyao; Zhou, Shijian; Wang, Fei

doi:10.22061/jcarme.2023.9410.2262

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	Vibration characteristics of rotor systems with disk-shaft clearance
Journal of Computational & Applied Research in Mechanical Engineering (JCARME)
مقاله 1، دوره 13، شماره 2 - شماره پیاپی 26، فروردین 2024، صفحه 123-136 اصل مقاله (1.38 M)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22061/jcarme.2023.9410.2262
نویسندگان
Zhinong Li^* ¹؛ Fang Qiao¹؛ Yunlong Li²؛ Shiyao Chen¹؛ Shijian Zhou¹؛ Fei Wang³
¹Key Laboratory of Nondestructive Testing of the Ministry of Education, Nanchang Hangkong University, Nanchang, Jiangxi, 330063, China
²School of Mechanical Engineering, Guangxi University, Nanning, Guangxi, 530004, China
³School of Aircraft Engineering, Nanchang Hangkong University, Nanchang, Jiangxi 330063, China
تاریخ دریافت: 24 آبان 1401، تاریخ بازنگری: 19 شهریور 1402، تاریخ پذیرش: 26 شهریور 1402
چکیده
Currently, the existing study on rotor system with disk-shaft clearance primarily focuses on analyzing factors such as interference force and friction coefficient while neglecting the vibration characteristics during the rotational states. Therefore, a finite element model is established by taking rotor systems with disk-shaft clearance as the research object. The vibration characteristics of rotor systems under different clearances or rotation speeds are analyzed. Increasing clearance leads to gradual fluctuations in the speed difference of shaft to disk, accompanied by an increasing periodicity of these fluctuations. In the time domain diagram, beat vibration characteristic become evident, and its period undergoes noticeable changes. The amplitude of rotation frequency increases, while that of multiple frequency decreases gradually and tends to a constant value. The presence of clearance causes the orbit of the disk center to become an irregular circle, and the shape of 8 appears. Additionally, collision and friction of shaft to disk result in apparent serrations in the orbit. As the rotational speed increases, the speed difference initially increases but eventually reaches a stable value. The beat vibration characteristic disappears due to the small speed difference, leading to a small amplitude of the multiple frequency. The orbit of the disk center tends to become circular, and the serrated phenomenon weakens and disappears. Finally, the experiments of rotor systems with disk-shaft clearance are carried out. The results are in good agreement with the simulations, which verifies the correctness of the dynamic model. The research results can provide a theoretical basis for understanding rotor systems with disk-shaft clearance.
کلیدواژه‌ها
Rotor system؛ Disk-shaft clearance؛ Beat vibration؛ Vibration characteristics؛ Speed difference

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Vibration characteristics of rotor systems with disk-shaft clearance