基于随机过程数学建模的声发射信号振幅重构

IF 0.9 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Russian Journal of Nondestructive Testing Pub Date : 2024-08-23 DOI:10.1134/S1061830924601788
V. N. Berkovich, S. I. Builo, B. I. Builo
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摘要

摘要 研究了弹性大质量体在失效前阶段由边界附近的内部缺陷产生的随机振荡问题。该研究基于声发射(AE)理论中的不变量法的结果,根据不变量法,当体保持在同一失效前阶段时,由缺陷引起的声发射(AE)信号参数值的统计分布服从稳定条件。本文构建了弹性大质量体中位移非稳态波场的数学模型,并对其应用的正确性问题进行了研究。该问题简化为研究特殊类随机过程中的某个边界积分方程。我们提出了基于 AE 信号重建和描述自由边界上缺陷发射随机过程性质的问题。文中给出了数值分析数据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Reconstruction of the Amplitude of Signals of Acoustic Emission Based on Mathematically Modeling as a Stochastic Process

The problem of random oscillations generated by an internal defect within the neighborhood of the boundary of an elastic massive body at the prefailure stage is considered. The study is based on the results of the invariant method in the theory of acoustic emission (AE), according to which the statistical distribution of the values of the parameters of acoustic emission (AE) signals due to a defect obeys the stability condition when the body remains at the same prefailure stage. A mathematical model of a nonstationary wave field of displacements in an elastic massive body is constructed and the issues of the correctness of its application are studied. The problem is reduced to the study of a certain boundary integral equation in special classes of stochastic processes. We pose the problem of reconstructing and describing the nature of the random process of defect emission on the free boundary of the body based on AE signals. The data of numerical analysis are presented.

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来源期刊
Russian Journal of Nondestructive Testing
Russian Journal of Nondestructive Testing 工程技术-材料科学:表征与测试
CiteScore
1.60
自引率
44.40%
发文量
59
审稿时长
6-12 weeks
期刊介绍: Russian Journal of Nondestructive Testing, a translation of Defectoskopiya, is a publication of the Russian Academy of Sciences. This publication offers current Russian research on the theory and technology of nondestructive testing of materials and components. It describes laboratory and industrial investigations of devices and instrumentation and provides reviews of new equipment developed for series manufacture. Articles cover all physical methods of nondestructive testing, including magnetic and electrical; ultrasonic; X-ray and Y-ray; capillary; liquid (color luminescence), and radio (for materials of low conductivity).
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