Vibration analysis of cracked rotor sliding bearing system with rotor–stator rubbing by harmonic wavelet transform

• Published in: Journal of sound and vibration Vol. 271; no. 3; pp. 507 - 518
• Main Authors: Wan, Fangyi, Xu, Qingyu, Li, Songtao
• Format: Journal Article
• Language: English
• Published: London Elsevier Ltd 06.04.2004; Elsevier
• Subjects: Exact sciences and technology; Fundamental areas of phenomenology (including applications); Physics; Solid mechanics; Structural and continuum mechanics; Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...); Vibration; Time frequency domain method; Newmark method; Frequency domain method; Non linear transformation; Dynamic method; Rotor stator interaction; Time domain method; Wavelet transformation; Shaft; Plain bearing; Non linear effect; Structural analysis; Crack; Journal bearing
• ISSN: 0022-460X; 1095-8568
• DOI: 10.1016/S0022-460X(03)00277-3

In this paper, the vibration of a cracked rotor sliding bearing system with rotor–stator rubbing is investigated using harmonic wavelet transform (HWT). Three non-linear factors, non-linear oil film forces, rotor–stator rubbing and the presence of crack, are taken into account. So the non-linear behavior of the rotor will be much more complex. According to Newmark method, the dynamic response of the rotor is calculated. Using HWT method, the effect of these non-linear factors is analyzed simultaneously in both time and frequency domain. The numerical simulated result shows that HWT will be available to analyze this multi-non-linear factors rotor effectively and can reveal the exact fault characteristics in detail.