ANALYTICAL MODELING OF ACOUSTIC EMISSION SIGNALS IN THIN-WALLED OBJECTS

Autor: Vera A. Barat, S. V. Elizarov, Vladimir V. Bardakov, Denis Terentyev
Rok vydání: 2020
Předmět:
Modal analysis
Acoustics
Thin walled
02 engineering and technology
Impulse (physics)
lcsh:Technology
01 natural sciences
Signal
lcsh:Chemistry
Computer Science::Hardware Architecture
Lamb waves
0203 mechanical engineering
0103 physical sciences
Computer Science::Multimedia
Waveform
Waveguide (acoustics)
General Materials Science
lcsh:QH301-705.5
010301 acoustics
Instrumentation
Computer Science::Cryptography and Security
Fluid Flow and Transfer Processes
Physics
Data processing
lcsh:T
Process Chemistry and Technology
Attenuation
General Engineering
attenuation of acoustic emission waves
modal analysis
lcsh:QC1-999
Computer Science Applications
020303 mechanical engineering & transports
lamb waves
lcsh:Biology (General)
lcsh:QD1-999
Acoustic emission
lcsh:TA1-2040
acoustic emission
lcsh:Engineering (General). Civil engineering (General)
lcsh:Physics
Zdroj: Applied Sciences, Vol 10, Iss 1, p 279 (2019)
Applied Sciences
Volume 10
Issue 1
ISSN: 0201-7032
DOI: 10.14489/td.2020.06.pp.023-029
Popis: 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.
Databáze: OpenAIRE
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