IMPROVING THE ACCURACY OF MEASURING THE PARAMETERS OF FREQUENCY-DEPENDENT ATTENUATION OF A LONGITUDINAL ULTRASONIC WAVE IN SOLIDS
- Авторлар: Bazulin E.G.1, Dolgova E.S.2
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Мекемелер:
- ECHO+ Research and Production Center LLC
- Moscow Power Engineering Institute (National Research University)
- Шығарылым: № 11 (2025)
- Беттер: 28-43
- Бөлім: Acoustic methods
- URL: https://bakhtiniada.ru/0130-3082/article/view/303299
- DOI: https://doi.org/10.31857/S0130308225110033
- ID: 303299
Дәйексөз келтіру
Аннотация
The article proposes a method for improving the accuracy of measuring the parameters of frequency-dependent attenuation of longitudinal ultrasonic waves in solids using standard flaw detectors and piezoelectric transducers (PEP). Traditional approaches such as Papadakis and Roth methods are considered and their limitations are revealed due to the difficulties of accounting for reflection coefficients, wave front divergence and the influence of the contact layer. An improved method based on the Rota method using a multi-frequency correction of the wavefront divergence is proposed, and an optimization method based on the NSGA-II genetic multicriteria algorithm for estimating attenuation parameters is proposed. The analysis of factors affecting the measurement accuracy is carried out, such as: frequency characteristics of the PEP, amplitude measurement errors, the presence of structural noise, sampling step, energy leakage at the boundaries of the sample, etc. The results of numerical experiments performed in the CIVA program, when using a converter with an operating frequency of 5 MHz, showed a relative error in measuring the speed of sound at ± 0,1%, attenuation coefficient ±1,5 %, and degree of frequency dependence ±20 %. A model experiment on a steel sample with two “steps” of 12 and 20 mm using a converter with an operating frequency of 10 MHz confirmed the practical applicability of the method: the relative error in measuring the longitudinal wave velocity for two “steps” can be estimated as ±0,1 %, the attenuation coefficient ±1 % and the degree of frequency dependence ±2 %. To increase accuracy, it is recommended to use PEP with an operating frequency of 10 MHz and the use of separately combined converters
Авторлар туралы
Evgeny Bazulin
ECHO+ Research and Production Center LLC
Email: bazulin@echoplus.ru
Ресей, 123458 Moscow, Tvardovskiy str., 8, Strogino Technopark
Ekaterina Dolgova
Moscow Power Engineering Institute (National Research University)
Хат алмасуға жауапты Автор.
Email: dol.katerina@vk.com
Ресей, 111250 Moscow, Krasnokazarmennaya str., 14
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