Resonance Scattering Methods for NDT, Acoustics, and RADAR
作者： H. Überall , P. J. Moser , A. Nagl , J. V. Subrahmanyam , P. P. Delsanto
DOI: 10.1007/978-3-662-02363-1_23
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摘要: The eigenvibrations of an inhomogeneity (e.g., a crack, cavity, or inclusion) in elastic matrix may be excited by incident ultrasonic beam, similarly as the sonar radar target get wave. This excitation results appearance effects resonances returned echo signals, which analyzed to obtain resonance frequency spectrum target. approach “acoustic spectroscopy” provides us with means identifying and classifying inhomogeneity. eigen-frequencies are related surface waves (“creeping waves”) on target, example helical obliquely plane wave cylindrical cavity inclusion is treated detail. A synthesis from certain poles scattering amplitude complex accomplished time domain.
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sci-hub.st 参考文章(17)
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