AE Identification of Flanged Connection Condition in Vibration Environment

Abstract:

On the basis of vibration testing of flanged connection structure, AE signals gathered are carried on processing with MATLAB,mainly the reconstructed signals. The concepts of characteristic frequency band and the superiority frequency band are drawn, and the layers of wavelet packet decomposition are determined, and the frequency band distributed characteristics of acoustic emission (AE) are obtained. With the percentage of wavelet packet energy band, the strengths of superiority frequency band and the relationship of torque and it are gotten quantitatively and it is found that the energy has certain regularity with the torque changing, and proposed that express its rule characteristic with wavelet packet energy spectrum rate of change this target in order to achieve the identification of the connection structure condition.

• Periodical: Key Engineering Materials (Volume 517)
• Pages: 836-843
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.517.836
• Online since: June 2012
• Authors: Ning Wang, Yong Yao, Jun Lin Tao, Lin Long
• Keywords: Acoustic Emission (AE), Flanged Connection, Frequency Band Energy, Identification, Vibration

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