An experimental study on the nonlinear vibration phenomenon of a rotor system subjected to barrel roll flight and coupled rub-impact faults. (1st March 2020)

• Record Type: Journal Article
• Authors: Gao, Tian; Cao, Shuqian; Hou, Lanlan; Hou, Yuanhang
• Is Part Of: Measurement. Volume 153(2020)
• Publication Date: 2020-03-01
• Subjects: Barrel roll flight -- Coupled rub-impact faults -- Nonlinear vibration -- Experimental study; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2019.107406
• Languages: English
• ISSNs: 0263-2241

Abstract

Highlights: Differences of two types of rub-impact rotors for an aircraft in flight maneuvers. Amplitude modulation of harmonic frequencies caused by aircraft barrel roll flight. Distinguishable transient harmonic frequencies of multi-fault rub-impact rotors. Abstract: This study focuses on the nonlinear vibration phenomenon of a rotor system subjected to aircraft barrel roll flight and coupled rub-impact faults. An experimental device is designed to imitate the rotor installed on an aircraft, which is rare because of the complex installation conditions of a rotor system. The transient nonlinear dynamic behavior of a rub-impact fault rotor and a coupled rub-impact fault rotor with misalignment are investigated for an aircraft in barrel roll flight. By combining a spectrum cascade, reassigned wavelet scalogram, and spectrogram, some novel nonlinear features of two types of rub-impact fault rotors are obtained, the most critical being the distinguishable transient harmonic components due to the time-varying influence of the aircraft barrel roll flight. This analysis contributes to a deep understanding of the complex nonlinear vibration phenomenon of coupled rub-impact fault rotors during flight maneuvers.