Method of Finite Differences in Time Domain. Calculating Echo Signals in Anisotropic Inhomogeneous Materials, Pattern Noise
- 作者: Bazulin E.1, Konovalov D.2, Sadykov M.2
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隶属关系:
- ECHO+ Scientific Production Association
- Moscow Power Engineering Institute
- 期: 卷 54, 编号 8 (2018)
- 页面: 539-545
- 栏目: Acoustic Methods
- URL: https://journals.rcsi.science/1061-8309/article/view/181758
- DOI: https://doi.org/10.1134/S1061830918080028
- ID: 181758
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详细
When developing ultrasonic testing techniques for such complex objects as composite welds, the method of finite differences in time domain (FDTD) can be used to calculate echo signals in numerical experiments. Since the FDTD method is based on explicit numerical solution of the wave equation for an elastic medium, it can be used to take account of such effects as the emergence of a run round wave on a volume reflector, the transformation of a longitudinal wave into a lateral one under scattering of ultrasound by a crack, and the rescattering of pulses between reflectors and test-object boundaries. Applying the FDTD method to modeling the propagation of ultrasound in the sample with a high pattern noise and in the samples made of anisotropic inhomogeneous materials is substantiated. The FDTD calculation of the direct problem of propagation of elastic vibrations in a solid may prove useful when solving the inverse problem of ultrasonic nondestructive testing.
作者简介
E. Bazulin
ECHO+ Scientific Production Association
编辑信件的主要联系方式.
Email: bazulin@echoplus.ru
俄罗斯联邦, Moscow, 123458
D. Konovalov
Moscow Power Engineering Institute
Email: bazulin@echoplus.ru
俄罗斯联邦, Moscow, 111250
M. Sadykov
Moscow Power Engineering Institute
Email: bazulin@echoplus.ru
俄罗斯联邦, Moscow, 111250