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Qiuyue Li

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Proceedings Article | 9 October 2022 Paper

Research on finite element analysis and signal denoising based on electromagnetic acoustic emission

Chenglong Yang, Yushu Lai, Qiuyue Li

Proceedings Volume 12246, 1224608 (2022) https://doi.org/10.1117/12.2643467

KEYWORDS: Electromagnetism, Acoustic emission, Wavelets, Denoising, Finite element methods, Magnesium, Metals

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In order to investigate the feasibility of acoustic emission phenomenon aroused by electromagnetic excitation in metal specimens, electromagnetic acoustic emission model based on COMSOL software was established. On this basis, electromagnetic acoustic emission experiments were carried out and real signals with a lot of noise were obtained. To remove the noise of the electromagnetic acoustic emission signal, wavelet packet transform and complete ensemble empirical mode decomposition with adaptive noise(CEEMDAN) was introduced. Firstly, the noise signal of low-frequency was removed by the wavelet packet transform, and the retained node signal was reconstructed. Then the reconstructed signal was resolved by CEEMDAN, and the effective component signal was obtained by the variance contribution rate. Finally, to obtain denoised electromagnetic acoustic emission signal, the effective component signal was reconstructed. The result of simulation and experiment shows that the electromagnetic acoustic emission signal could be effectively obtained by loading electromagnetic excitation, which has greater practical value in engineering applications.

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