Accession Number : ADA258769
Title : Critical Frequencies in Scattering from Submerged Elastic Shells
Descriptive Note : Final proceedings rept.
Corporate Author : NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
Personal Author(s) : Werby, Michael F ; Ali, Hassan B ; Broadhead, Michael K
Report Date : Oct 1992
Pagination or Media Count : 8
Abstract : In the process of scattering from submerged elastic shells, it is possible to excite many types of resonances. Among these are the lowest order symmetric and antisymmetric Lamb modes, and the waterborne waves, such as the pseudo-Stoneley resonances and the higher order symmetric and antisymmetric Lamb modes Si and Ai (i = 1, 2, 3, ...). the frequency at which these originate are referred to as critical frequencies. We establish simple rules to determine the frequencies at which the resonances originate as a function of shell thickness and material properties.
Descriptors : *FREQUENCY , *ACOUSTIC SCATTERING , *ELASTIC SHELLS , FUNCTIONS , PROPAGATION , REPRINTS , THICKNESS , SCATTERING , WATER , MATERIALS , EXCITATION , WAVEGUIDES , STEEL , PHASE , SHALLOW WATER , ALUMINUM , SYMMETRY , RESONANCE , ACOUSTICS , LAMB SHIFT , WATERBORNE , WAVES , FLUIDS , OCEANS
Subject Categories : Structural Engineering and Building Technology
Nuclear Physics & Elementary Particle Physics
Radiofrequency Wave Propagation
Distribution Statement : APPROVED FOR PUBLIC RELEASE