Results 21 to 30 of about 128,863 (267)

Influence of Physical Parameters of Coal Seam on “Cross” Phenomenon of Rayleigh In-seam Wave Dispersion Curve

open access: yesMeikuang Anquan, 2020
Dispersion curves of Rayleigh channel waves may have “cross” between the fundamental and first higher order modes either in the phase velocities or in group velocities in the low frequency band.
HE Daxi, ZHU Peimin, SHEN Suishui, CAI Wei, WANG Wengang
doaj   +1 more source

Estimating the Shear-Wave Velocities of Shallow Sediments in the Yellow Sea Using Ocean-Bottom-Seismometer Multicomponent Scholte-Wave Data

open access: yesFrontiers in Earth Science, 2022
Scholte-wave dispersion analysis is effective at imaging the relatively low shear-wave velocity of shallow marine sediments in marginal seas. The combination of a four-component ocean-bottom-seismometer (OBS) and a towed air-gun source can economically ...
Yuan Wang   +8 more
doaj   +1 more source

Propagation Behavior of Love-Type Waves in a Poro-elastic Medium using Staggered Grid Finite Difference Scheme [PDF]

open access: yesMechanics of Advanced Composite Structures, 2021
The analysis of the propagation behaviour of seismic waves in porous medium requires a mathematical backup. That is pictured here. The present study investigates the propagation behavior of Love-type waves in a poro-elastic medium.
Jayantika Pal, Anjana Ghorai
doaj   +1 more source

Direct Calculation of the Group Velocity for Two-Dimensional Complex, Composite and Periodic Structures Using a Wave and Finite Element Scheme

open access: yesApplied Sciences, 2021
Guided waves have immense potential for structural health monitoring applications in numerous industries including aerospace. It is necessary to evaluate guided wave dispersion characteristics, i.e., group velocity and phase velocity profiles, for using ...
Muhammad Khalid Malik   +2 more
doaj   +1 more source

Modeling Magnetostrictive Transducers for Structural Health Monitoring: Ultrasonic Guided Wave Generation and Reception

open access: yesSensors, 2021
Ultrasonic guided waves provide unique capabilities for the structural health monitoring of plate-like structures. They can detect and locate various types of material degradation through the interaction of shear-horizontal (SH) waves and Lamb waves with
Gaofeng Sha, Cliff J. Lissenden
doaj   +1 more source

Plotting Lamb waves dispersion curves of an aluminum plate by the Semi-Analytical Finite Element (SAFE) method and comparison with analytical curves [PDF]

open access: yesITM Web of Conferences, 2022
It is well known that the propagation of Lamb waves in elastic solid medias depends on the frequency and on the material properties, but it does not depend on the propagation direction in isotropic medias and gives rise to two basic types of modes ...
Jabiri Ayoub   +2 more
doaj   +1 more source

Seismic Interferometry Method Based on Hierarchical Frequency Fusion and Its Application in Microtremor Survey

open access: yesApplied Sciences, 2023
Site velocity structure determination and stratigraphic division are important purposes of microtremor survey, and the precision of dispersion curves is an important factor affecting the accuracy of microtremor survey.
Xingang Mou   +5 more
doaj   +1 more source

Surf-Net: A deep-learning-based method for extracting surface-wave dispersion curves

open access: yesFrontiers in Earth Science, 2023
Surface wave is an energy-rich component of the seismic wavefield and has been widely employed in understanding underground structures due to its dispersive nature.
Yiran Jiang   +11 more
doaj   +1 more source

Dispersive geometric curve flows [PDF]

open access: yesSurveys in Differential Geometry, 2014
The Hodge star mean curvature flow on a 3-dimension Riemannian or pseudo-Riemannian manifold, the geometric Airy flow on a Riemannian manifold, the Schrodingier flow on Hermitian manifolds, and the shape operator curve flow on submanifolds are natural non-linear dispersive curve flows in geometric analysis.
openaire   +2 more sources

Phonon dispersion curves in Cr2AlC single-crystals

open access: yesMaterials Research Letters, 2018
Neutron inelastic scattering is used for the first time to measure phonon dispersion branches in Cr2AlC MAX phase single crystals with appreciable size. Phonon spectra are also calculated within the Density Functional Perturbation Theory (DFPT) framework
A. Champagne   +7 more
doaj   +1 more source

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