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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