[PDF] Ultrasonic Studies Of Transient Seismo Acoustic Waves In Bounded Solids And Liquid Solid Interfaces eBook

Author : Jacques R. Chamuel
Publisher :
Page : 56 pages
File Size : 43,9 MB
Release : 1991
Category :
ISBN :

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This report summarizes a collection of laboratory ultrasonic modeling findings on transient liquid/solid seismo-acoustic wave phenomena. The topics covered include: (1)horizontal refraction of flexural waves by trapped gas pockets underneath floating plate, (2) wide-angle remote generation of broadband transient Scholte waves at liquid/solid interfaces from conversion of underwater acoustic waves by abrupt liquid discontinuities, steep topographic features, and adjacent immersed elastic solids, (3) characteristics of multiple transient leaky Rayleigh wave components in shallow water, (4) effect of water loading on edge waves along apex of immersed acute-angle solid wedge, and (5) on group velocity of medium frequency transient longitudinal waves in thick elastic waveguides. The findings pertain to Arctic underwater acoustics, ice mechanics, geophysical exploration, material characterization, nondestructive testing, and acoustic sensors.

Author :
Publisher :
Page : 76 pages
File Size : 11,14 MB
Release : 1994
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ISBN :

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New ultrasonic modeling findings are presented contributing to ten fundamental problems related to low-frequency seismoacoustic wave phenomena resulting from the interaction of underwater acoustic waves with heterogeneous elastic boundaries such as the ice cover and/or ocean bottom. The results are described in ten independent sections covering the following problems: (1) backscattering of Scholte waves and grazing underwater acoustic waves by a trench at a liquid/solid interface, (2) explanation for observed underwater acoustic backscatter from the Canada Basin near 73.2 deg N, 139 deg W where recent bathymetric charts do not reveal the existence of large bathymetric highs nearby, (3) effect of a thin low-velocity layer underneath a floating plate on flexural wave dispersion, (4) effect of viscous waves from suspended particles in a thin layer under sea ice on low-frequency underwater acoustic wave reflectivity, (5) comparison of experimental and theoretical results on the dispersion of antisymmetric edge waves along apex of truncated elastic wedge, (6) wave propagation along apex of free and immersed elastic wedge with range-dependent apex angle and cross section, (7) shear wave coupling to ice cores, (8) ultrasonic characterization of sea ice cores, (9) monostatic seismic profiling using scattering from 45 deg oblique cylindrical hole in ice plate using one compressional transducer, and (10) sea ice finger-rafting and ice thickness. (MM).

Author : Hesham Ameen
Publisher : Springer Nature
Page : 162 pages
File Size : 27,77 MB
Release : 2019-11-01
Category : Science
ISBN : 3030341992

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The articles presented in this book deal with the attempts made by the scientists and practitioners to address contemporary issues in geoenvironmental engineering such as characterization of dredged sediments, geomaterials & waste, valorization of waste, sustainability in waste management, and some other geoenvironmental issues that are becoming quite relevant in today's world. With high urbanization rates, advancement in technologies, and changes in consumption behavior of people, wastes generated through the daily activities of individuals and organizations pose many challenges in their management.