Investigation of the origin of acoustic Wood anomaly

Liu, Jingfei; Declercq, Nico F.

doi:10.1121/1.4926903

Cited by 13 publications

(4 citation statements)

References 36 publications

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“…Diffraction of an acoustic beam from a periodically corrugated interface has been studied in several works [21][22][23][24][25][26][27]. In this type of diffraction phenomenon, the periodic surface corrugations work as a diffraction grating, and the periodicity of the corrugated surface is crucial to the diffraction pattern.…”

Section: Ultrasonic Bragg Diffraction For Measuring the Characteristi...mentioning

confidence: 99%

Ultrasonic investigation of the effect of compressive strains on 3D periodic bi-material structures

et al. 2022

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Due to the specific elastic properties such as high stiffness to mass ratio, regular microstructure materials are widely used in the industry. The need for nondestructive evaluation is ubiquitous to ensure material quality. As an effective nondestructive testing method, ultrasound has great potential in providing an efficient materials characterization. However, contrary to more convenient ultrasound applications, challenges arise when applying ultrasound to 3D bi-material structures due to the coexistence of different phenomena, including diffraction effects caused by the periodicity. Two linear ultrasound methods, namely the Bragg diffraction and the comb filtering effect, are proposed to address this hurdle. The results show that the comb filtering effect effectively characterizes, respectively, the vertical structural quality of the bi-material. Bragg diffraction can also expose structural variations in the horizontal plane.

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Section: Ultrasonic Bragg Diffraction For Measuring the Characteristi...mentioning

confidence: 99%

Ultrasonic investigation of the effect of compressive strains on 3D periodic bi-material structures

et al. 2022

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“…These effects were first observed in diffraction gratings experimentally by Wood [18] and partly explained theoretically by Rayleigh [19]. In the context of array scattering, occurrences of resonance are frequently referred to as Wood’s anomalies [20]. Here, the waves scattered off each of the array’s individual scatterers are in phase with each other and interfere constructively to form a plane wave propagating along the array.…”

Section: Introductionmentioning

confidence: 99%

Array scattering resonance in the context of Foldy’s approximation

et al. 2022

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This article provides an overview of resonance phenomena in wave scattering by infinite and semi-infinite periodic arrays of small cylindrical scatterers, in the context of Foldy’s approximation. It briefly summarizes well-known results from the literature. Moreover, for infinite arrays, the asymptotics of the resonant wave amplitudes in the double resonance case is investigated. This leads to the rediscovery of non-uniqueness of the solution in this context, and to a discussion of the validity of Foldy’s approximation for double resonance. For semi-infinite arrays, a new and improved uniform far-field approximation is derived, uniqueness issues are considered and the validity of Foldy’s approximation is discussed.

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“…Recent examples of the same strategy are Ducourneau et al, 7 Wang et al, 8 and Zhao et al 9 Experimentally, the effects on the reflected sound field caused by the periodicity of a surface have been demonstrated and analysed by Liu and Declerq. 10 In their work, they analysed the reflection from a periodically corrugated surface.…”

Section: Introductionmentioning

confidence: 99%

Absorption and scattering by perforated facings with periodic narrow slits

Brunskog

Glebe

Garza-Agudelo

et al. 2022

The Journal of the Acoustical Society of America

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This paper develops a theory for the sound absorption and scattering of perforated slit absorbers. A rigid plane, perforated periodically in one dimension with absorbing slits, scatters incoming sound waves as discrete wave components in different directions. The absorbing slits are assumed to be line-like in the sense that their width is much shorter than the wavelengths. The equation for the sound field is solved in the wavenumber domain. The slits are described with an impedance description, assuming local reaction of the slits (typically a Helmholtz resonator). The solution is found by means of an inverse transform, back to the spatial domain. This results in an explicit formulation of the sound field, including a sum consisting of components that either radiate energy in discrete directions or are surface waves. A similar sum is also included in a term that can be interpreted as radiation impedance. The explicit expressions for the absorption and scattering coefficients are found with the aid of the radiating part of the scattered and reflected field. Numerical results of the absorption and scattering coefficients are presented. The result is verified with finite element method and compared with the result from an alternative general formulation of the problem.

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Investigation of the origin of acoustic Wood anomaly

Cited by 13 publications

References 36 publications

Ultrasonic investigation of the effect of compressive strains on 3D periodic bi-material structures

Ultrasonic investigation of the effect of compressive strains on 3D periodic bi-material structures

Array scattering resonance in the context of Foldy’s approximation

Absorption and scattering by perforated facings with periodic narrow slits

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