Analysis on Multimode Nonlinear Resonance of an Asymmetric Rolling Bearing Rotor with the Application of a Squeeze Film Damper

• Published in: Shock and vibration Vol. 2021; no. 1
• Main Authors: Huizheng, Chen, Shun, Zhong, Zhenyong, Lu, Yushu, Chen, Xiyu, Liu
• Format: Journal Article
• Language: English
• Published: Cairo Hindawi 2021; Hindawi Limited; Wiley
• Subjects: Ball bearings; Behavior; Damping; Demand analysis; Design optimization; Design parameters; Excitation; Journal bearings; Nonlinear systems; Parameter identification; Resonance; Resonant frequencies; Roller bearings; Rotor-bearing systems; Squeeze films; Vibration analysis; Vibration control
• ISSN: 1070-9622; 1875-9203
• DOI: 10.1155/2021/4370981

Rolling bearings are a type of main support for aeroengines and are a key source of vibration (parametric excitation) in rotor-bearing systems, which create a demand for vibration analysis and diagnostic techniques under various operating conditions [9]. Studying the nonlinear behaviour of the system and identifying the influence of rolling element bearing parameters on the nonlinear behaviours of the rotor system will help to reasonably avoid system instability, increase the operating life, and improve the efficiency of mechanical equipment [10]. [...]the rolling bearing supported rotor systems have drawn many research interests [11–17]. The resonance types of a multi-degree-of-freedom rolling bearing-rotor system mainly contain (1) prime resonances of each order, that is, the resonance when the external frequency is equal to the natural frequency of the system, (2) superharmonic or subharmonic resonances, which are caused by the nonlinear relationship between the excitation and response in the nonlinear system, (3) quasi-periodic resonances, and (4) combination resonances. [...]it is necessary to add damping structures to suppress the unexpected resonances. To further investigate the dynamical behaviours and achieve better or desired performances of the rotor systems with SFD, so as to provide a theoretical basis for the corresponding vibration reduction design strategy, the design of the parameters of the SFD need focused attention. [...]this work will focus on the dynamic analysis of the ball bearing supported rotor system with the application of the SFD and their parameter analysis.