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| Acoustic Response Characteristics of Acoustic Emission Induced by Eddy Current Exciting |
| Cai Zhichao1, Liu Suzhen1, Zhang Chuang1, Yang Qingxin1, 2 |
1. Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology Tianjin 300130 China;
2. Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University Tianjin 300387 China |
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Abstract Due to the contactless local loading of electromagnectic acoustic emission, this paper provides a method for the damage online inspection under severe working conditions, which is a beneficial supplement of traditional acoustic emission technology. This paper studies the acoustic response characteristics arising from electromagnetic acoustic emission under various electromagnetic loads. According to the electroplastic theory and free-electron theory, the mechanism of acoustic emission energy release and the rate variations of the crack tip dislocation slip are analyzed. Thus, the various acosutic responses of the electronic directional movement under different magnetic field directions can be obtained. The electromagnetic acoustic emission signal analysis based on Hilbert- Huang transform (HHT) is an effective tool to extract the features. The experimental results show the stress wave characteristics are closely related to electromagnetic loading. Therefore, this process is the specific acoustic response between the directional mobile electronic and obstacle barrier.
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Received: 30 July 2015
Published: 03 January 2017
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2016, Vol. 31 
