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Research on early weak structural damage detection of aeroengine intershaft bearing based on acoustic emission technology
- Source :
- Structural Health Monitoring. 20:3113-3122
- Publication Year :
- 2020
- Publisher :
- SAGE Publications, 2020.
-
Abstract
- Until now, there is no effective method to detect the early weak structural damage of the aero engine intershaft bearing. In this article, an online method based on acoustic emission technology is used to detect the early weak structural damage of aeroengine intershaft bearing. The combination of maximum correlated kurtosis deconvolution and bandpass filter is proposed to enhance and denoise fault characteristic signals of the aero engine intershaft bearing. The Hilbert envelope demodulation is used to extracting the bear fault characteristic frequency. Under aeroengine working conditions, the experiment of an intershaft bearing with outer ring fault is carried out. The result shows that bearing outer ring fault characteristic frequency and bearing vibration frequencies clearly appear in the envelope spectrum of the acoustic emission signal. Therefore, online detection of early weak structure damage of aeroengine intershaft bearing is realized by acoustic emission technology under the background of strong noise.
- Subjects :
- Damage detection
Materials science
Bearing (mechanical)
Mechanical Engineering
Acoustics
Biophysics
02 engineering and technology
Aero engine
01 natural sciences
law.invention
020303 mechanical engineering & transports
0203 mechanical engineering
Acoustic emission
law
0103 physical sciences
Online method
010301 acoustics
Subjects
Details
- ISSN :
- 17413168 and 14759217
- Volume :
- 20
- Database :
- OpenAIRE
- Journal :
- Structural Health Monitoring
- Accession number :
- edsair.doi...........85632ac3c69df2cdbd5c5f457bfc49a2