Results 281 to 290 of about 2,649,760 (341)

Partially Embedded Gradient Metabarrier: Broadband Shielding from Seismic Rayleigh Waves at Ultralow Frequencies

, 2020
A partially embedded gradient metabarrier (PEGM) for seismic Rayleigh waves was designed and studied using the finite-element method (FEM).
Ze Liu, Kai-Qiang Qin, Gui-Lan Yu
semanticscholar   +1 more source

Propagation of Rayleigh waves in unsaturated porothermoelastic media

International journal for numerical and analytical methods in geomechanics (Print), 2020
Based on the frame of elastic theory for unsaturated porous medium, considering the influence of thermal effect, the propagation characteristics of Rayleigh wave in unsaturated porous media are studied. Firstly, the thermoelastic wave equations for three‐
Hongbo Liu, Feng-xi Zhou, Li-ye Wang, Ruiling Zhang   +3 more
semanticscholar   +1 more source

Propagation of Rayleigh waves in modified couple stress generalized thermoelastic with a three-phase-lag model

Waves in Random and Complex Media, 2019
The main aim of this article is to study the problem of propagation of Rayleigh waves in a homogeneous isotropic modified couple stress generalized thermoelastic medium.
Rajneesh Kumar, S. Devi, S. Abo-Dahab
semanticscholar   +1 more source

Asymptotic Theory for Rayleigh and Rayleigh-Type Waves [PDF]

, 2017
Explicit asymptotic formulations are derived for Rayleigh and Rayleigh-type interfacial and edge waves. The hyperbolic–elliptic duality of surface and interfacial waves is established, along with the parabolic–elliptic duality of the dispersive edge wave
J. Kaplunov, D. Prikazchikov
semanticscholar   +3 more sources

Stoneley and Rayleigh waves in thermoelastic materials with voids

Journal of Vibration and Control, 2019
The present paper deals with the propagation of surface waves (Stoneley and Rayleigh waves) in thermoelastic materials with voids. The frequency equations of the Stoneley waves at the bonded and unbonded interfaces between two dissimilar half-spaces of ...
S.S. Singh, Lalawmpuia Tochhawng
semanticscholar   +1 more source

Comparison of quasi-Rayleigh waves and Rayleigh waves, and clarifying the cut-off frequency of quasi-Rayleigh waves

Ultrasonics, 2019
The Partial Wave Method is unique in that it establishes a foundation on which various elastodynamic guided waves can be compared. In this paper, the method is used to compare quasi-Rayleigh waves and Rayleigh waves, and investigate the eccentricities of the Partial Wave Method at phase velocities equal to the Rayleigh wave speed.
Christopher, Hakoda, Cliff J, Lissenden
openaire   +2 more sources

Rayleigh-type surface waves in a nonlocal thermoelastic solid half space with voids

Waves in Random and Complex Media, 2020
The present paper deals with the propagation of surface waves in an isotropic and homogeneous nonlocal generalized thermoelastic solid half-space with voids. The dispersion relations for Rayleigh-type surface wave are derived for both thermally insulated
Baljeet Singh
semanticscholar   +1 more source

Wave gradiometry for USArray: Rayleigh waves

Journal of Geophysical Research: Solid Earth, 2009
Wave gradiometry (WG) is a new array data processing technique to extract phase velocity, wave directionality, geometrical spreading, and radiation pattern from spatial gradients of waveforms. A weighted inversion method and a reducing velocity method are introduced to compute spatial gradients accurately for irregular arrays. Numerical experiments are
Chuntao Liang, Charles A. Langston
openaire   +1 more source

Nonlinear magnetoelastic Rayleigh waves

Journal of Magnetism and Magnetic Materials, 1994
Abstract The propagation of nonlinear magnetoelastic waves in a semi-infinite ferromagnetic single crystal has been investigated. We consider the nonlinearity of magnetic origin and find the dispersion relation of coupled nonlinear magnetostatic and elastic Rayleigh waves. We present the results of a theoretical study of dispersion and attenuation of
S.A. Nikitov, A.A. Sharafatdinov
openaire   +1 more source

Rayleigh Wave Tomography

1991
Tomographic imaging involves the collection of data from a series of projections through an object, and the reconstruction of variations in a chosen parameter across a two-dimensional section. It is now an established method for the reconstruction of images from ultrasonic data, and has been used widely in such areas as medical ultrasound and non ...
D. P. Jansen, D. A. Hutchins
openaire   +1 more source