10.14489/td.2020.06.pp.023-029

2020, 06 June

DOI: 10.14489/td.2020.06.pp.023-029

Barat V. A., Terentyev D. A., Bardakov V. V., Elizarov S. V.
ANALYTICAL MODELING OF ACOUSTIC EMISSION SIGNALS IN THIN-WALLED OBJECTS
(pp. 23-29)

Abstract. For the effective detection of acoustic emission (AE) impulses against the noise background, the correct assessment of AE parameters and the increase in the defect location accuracy during data processing, it is necessary to consider the waveform of the AE impulse. The results of numerous studies have shown that the waveform of the AE impulse mainly depends on the properties of the waveguide – the path along which the signal propagates from the source to the sensor. In this paper, the effective analytical method for modeling of AE signals is considered, which allows to obtain model signals that have the shape of the envelope and spectrum as real one. Based on the obtained results, the attenuation parameters of AE waves for various characteristics of the waveguide and evaluate the probability of defects detecting at various distances between the AE source and sensor are evaluated. Based on the results obtained, the parameters of the AE impulse for various characteristics of the waveguide were estimated, and the parameters of the AE pulses and noise were compared.

Keywords: acoustic emission, Lamb waves, attenuation of acoustic emission waves, modeling of acoustic emission signals.

+ - About the Authors Click to collapse

V. А. Barat (“Interunis-IT” LLC, Shosse Entuziastov str., Moscow, Russia; National Research University “MPEI”, Moscow, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.
D. А. Terentyev (“Interunis-IT” LLC, Shosse Entuziastov str., Moscow, Russia) Е-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.
V. V. Bardakov (“Interunis-IT” LLC, Shosse Entuziastov str., Moscow, Russia; National Research University “MPEI”, Moscow, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.
S. V. Elizarov (“Interunis-IT” LLC, Shosse Entuziastov str., Moscow, Russia) Е-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

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