非对称支撑碰摩转子-轴承系统动力学特性研究

兰州理工大学学报 ›› 2026, Vol. 52 ›› Issue (2): 48-54.

非对称支撑碰摩转子-轴承系统动力学特性研究

孟子健, 王安^*

兰州理工大学机电工程学院, 甘肃兰州 730050

收稿日期:2023-04-19 出版日期:2026-04-28 发布日期:2026-04-28
通讯作者: 王安(1981-),男,甘肃靖远人,博士,副教授. Email:wangan1981@126.com
基金资助:
甘肃青年科技基金(1610RJYA020)

Study on dynamic characteristics of rubbing rotor-bearing system with asymmetrical support

MENG Zi-jian, WANG An

School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Received:2023-04-19 Online:2026-04-28 Published:2026-04-28

摘要/Abstract

摘要： 基于Jeffcott转子模型,构建滚柱轴承和滚球轴承支撑的碰摩转子-轴承系统动力学模型.在转速增加时,研究由质量偏心所引起碰摩故障的非线性特性.通过分岔图、相图、FFT频谱图和Poincaré截面图,分析转子系统的动力学响应.结果表明,随着转速加快系统表现出丰富的动力学行为.在低转速未发生碰摩时,系统振动主要受滚动轴承变刚度频率和系统旋转频率的影响,且出现旋转频率与VC频率的组合频率.在高转速发生碰摩时,转子系统主要存在f_p频率和f_p/2频率.研究结果可为非对称支撑碰摩转子系统在不同转速运行时提供理论指导,并为此类转子系统的稳定运行提供理论依据.

关键词: 转子-轴承系统, 碰摩, 非对称支撑, 分岔

Abstract: Based on the Jeffcott rotor model, a dynamic model of a rubbing rotor-bearing system supported by roller bearing and ball bearing was constructed to study the nonlinear character of the rub-impact fault due to the increase of the mass eccentricity when the rotor system speed increased. The dynamic response of the rotor system has been analyzed using a phase diagram, FFT spectrum, Poincaré diagram, and bifurcation diagram. The results found that the system exhibits rich dynamic behaviors with the increase of rotational speed. When there is no friction failure at low speed, the vibration of the system is mainly affected by the variable stiffness frequency of the rolling bearing and the system rotation frequency. Additionally, the combined frequency of rotation frequency and VC frequency occurs. At high speeds with frictional faults, the rotor system primarily exhibits frequencies of f_p and f_p/2. This research results provide theoretical guidance for asymmetric support impact rotor systems operating at different speeds and provide a theoretical basis for the stable operation of such rotor systems.

Key words: bearing-rotor system, rubbing, asymmetrical support, bifurcation

中图分类号:

TH113.1
O322

孟子健, 王安. 非对称支撑碰摩转子-轴承系统动力学特性研究[J]. 兰州理工大学学报, 2026, 52(2): 48-54.

MENG Zi-jian, WANG An. Study on dynamic characteristics of rubbing rotor-bearing system with asymmetrical support[J]. Journal of Lanzhou University of Technology, 2026, 52(2): 48-54.

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链接本文: https://journal.lut.edu.cn/CN/

https://journal.lut.edu.cn/CN/Y2026/V52/I2/48

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