Accession Number:

ADA243441

Title:

Ultrasonic Studies of Transient Seismo-Acoustic Waves in Bounded Solids and Liquid/Solid Interfaces.

Descriptive Note:

Final rept. Apr 90-Oct 91,

Corporate Author:

SONOQUEST ADVANCED ULTRASONICS RESEARCH WELLESLEY HILLS MA

Personal Author(s):

• Chamuel, Jacques R.

Report Date:

1991-11-01

Pagination or Media Count:

56.0

Abstract:

This report summarizes a collection of laboratory ultrasonic modeling findings on transient liquidsolid seismo-acoustic wave phenomena. The topics covered include 1horizontal refraction of flexural waves by trapped gas pockets underneath floating plate, 2 wide-angle remote generation of broadband transient Scholte waves at liquidsolid 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.

Descriptors:

• ACOUSTIC DETECTORS
• ACOUSTIC WAVES
• ARCTIC REGIONS
• BROADBAND
• DISCONTINUITIES
• EDGES
• ELASTIC PROPERTIES
• FLEXURAL PROPERTIES
• GEOPHYSICAL PROSPECTING
• GROUP VELOCITY
• HORIZONTAL ORIENTATION
• ICE MECHANICS
• INTERFACES
• LABORATORIES
• LIQUIDS
• MODELS
• NONDESTRUCTIVE TESTING
• RAYLEIGH WAVES
• REFRACTION
• SHALLOW WATER
• SOLIDS
• THICKNESS
• TOPOGRAPHY
• ULTRASONICS
• UNDERWATER ACOUSTICS
• WATER
• WAVEGUIDES
• WAVES

Subject Categories:

• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE