Influence of boundary conditions on acoustic emission propagation characteristics of Zelkova schneideriana

نویسندگان

چکیده

Abstract To study the propagation characteristics of acoustic emission signals in Zelkova schneideriana under different boundary conditions, three types conditions were generated by applying aluminum plates and sound-absorbing cotton on surface specimens. Firstly, sudden continuous (AE) sources simulated PLB (pencil–lead break) tests signal generator specimen surface, AE collected 5 sensors equally spaced specimen, sampling frequency was set to 500 kHz. Then, detailed bands obtained wavelet decomposition, TDOA (the time difference arrival) correlation analysis method used calculate longitudinal wave transverse corresponding velocity, respectively. Finally, pulse trains with energy levels as attenuation law distance conditions. The results show that changes can lead a significant increase have no effect velocity. At same time, waves is faster after plate are affixed, 90% reduced from 186 139 mm, 312 226 mm.

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ژورنال

عنوان ژورنال: Journal of Wood Science

سال: 2022

ISSN: ['1435-0211', '1611-4663']

DOI: https://doi.org/10.1186/s10086-022-02070-1