Dimension Spectrum Analysis of the Early Cracked Fault Characters for Aero Engine Rotors

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (1) : 88-93.

Wang Yanfeng, Zhu Jing, Teng Guangrong, Liang EnBo

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Abstract

It is difficult to investigate the early cracking fault for aero engine rotors. Based on crack propagation theory, a mathematical model of early cracking rotor vibration characteristics was established. -dimension spectrum was applied to analyse the model and test data from an early cracking rotor. Both results revealed that -dimension spectrum is efficient for fault signal analysis of early cracking rotors. Through the analysis, not only the fault frequency which is hard to acquire is obtained, but also the noise of mixing noise signals is reduced. It is concluded that -dimension spectrum shows effective properties in vibration monitoring of aero engines especially in early fault diagnosis and data analysis.

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aero engine rotors / cracked fault / theory model / vibration signal / -dimension spectrum

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Wang Yanfeng;Zhu Jing;Teng Guangrong;Liang EnBo. Dimension Spectrum Analysis of the Early Cracked Fault Characters for Aero Engine Rotors[J]. Journal of Vibration and Shock, 2015, 34(1): 88-93