Acoustical Scattering from an Elastic Sphere in Water PDF Download

Author: Kevin Lee Williams
Publisher:
ISBN:
Category : Sound-waves
Languages : en
Pages : 322

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Book Description

Author: Allan D. Pierce
Publisher: Academic Press
ISBN: 1483257762
Category : Technology & Engineering
Languages : en
Pages : 395

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Book Description
Underwater Scattering and Radiation describes the relevant theoretical foundations of underwater scattering and radiation. Acoustic scattering from elastic solids is discussed, and variational formulations in acoustic radiation and scattering are presented. Surface waves and quasi-cylindrical modes are also explored, along with the Helmholtz-Kirchhoff integral corollaries. Comprised of two chapters, this volume begins with a comprehensive account of scattering by elastic objects, focusing on the classic idealized shapes of spheres and infinite cylinders. The reader is introduced to important concepts such as normal modes, the S-matrix, and the T-matrix as well as resonances, whispering gallery modes, Franz modes, and Stoneley waves. Subsequent sections describe methods for treating scattering by elastic bodies of more general shapes. The T-matrix formalism is discussed and then applied to spheroidal scatterers and finite cylinders. The second chapter analyzes how variational principles can be used in acoustics, with the choice of topics directed toward applications to underwater acoustic radiation and scattering. This book will be of interest to physicists.

Author: William Harley Fender
Publisher:
ISBN:
Category : Sound
Languages : en
Pages : 132

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Book Description

Author: Claude Bourrely
Publisher: World Scientific
ISBN: 981461887X
Category :
Languages : en
Pages : 374

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Book Description
Contents:Light Scattering Problems in Astrophysics (J M Perrin)Surface Integral Operators and their Use in Acoustics and Electromagnetics (A Berthon)Acoustic Diffraction by Slender Bodies of Arbitrary Shape (M Tran-Van-Nhieu)High and Low Energy Approximations for the Electromagnetic Scattering by Irregular Objects (B Torresani)Electromagnetic Scattering and Mutual Interactions Between Closely Spaced Spheroids (J Dalmas & R Deleuil)Acoustical Imaging of 2D Fluid Targets Buried in a Half Space: A Diffraction Tomography Approach Using Line-Sources Insonification (B Duchene et al)Contribution of Radar Polarimetry in Radar Target Discrimination. The “Poincaré Planisphere”: a New Representation Method (E Pottier)Electromagnetic and Acoustic Waves in Random Media: from Propagation to Anderson Localization (B Souillard)Weak Disorder: Homogeneisation Method and Propagation (C Bardos)Coherent Propagation of Surface Acoustic Waves in Quasi-Periodic and Random Arrays of Grooves (D Sornette et al)On Asymptotic Behaviour of Waves States in Random Media (F Bentosela & R Rodriguez)A Study of Acoustic Transmission of Transient Signal in a Inhomogeneous Medium with the Help of a Wavelet Transform. Application to an Air-Water Plane Interface (G Saracco & Ph Tchamitchian)Three-Dimensional Impedance Scattering Theory (P Sabatier)Survey of Optimization Algorithms Applied to Inverse Problems (A Roger)A Linearized Inverse Problem: Acoustic Impedance Tomography of Biological Media (J P Lefebvre)and others Readership: Electrical engineers and mathematicians.

Author: Timothy J. Yoder
Publisher:
ISBN:
Category :
Languages : en
Pages : 234

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Book Description

Author: Herbert Überall
Publisher: CRC Press
ISBN: 9782881245138
Category : Science
Languages : en
Pages : 364

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Book Description
These 13 papers were part of a May 1989 symposium at the Catholic University of America, Washington, D.C., the home of much of the early theoretical and experimental work in acoustic resonance scattering. Topics include a historical survey of the development of the subject, a description of the MIIR and short- pulse methods, and new developments such as the derivation of exact acoustic background shells, application of the method of moments, and S-matrix product expansions. Annotation copyright by Book News, Inc., Portland, OR

Author: Ralph R. Goodman
Publisher:
ISBN:
Category : Sound-waves
Languages : en
Pages : 46

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Book Description

Author: Werner G. Neubauer
Publisher:
ISBN:
Category : Acoustic emission
Languages : en
Pages : 416

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Book Description

Author: Aaron Michael Gunderson
Publisher:
ISBN:
Category : Underwater acoustics
Languages : en
Pages : 306

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Book Description
Scattering by partially exposed objects breaking through an interface is profoundly different from scattering by the same objects in a free field environment. The presence of the interface both adds additional scattering paths, and can strongly modify or remove preexisting paths, depending upon the level of exposure and grazing angle. Acoustic scattering by partially exposed spheres and cylinders through an interface is considered in the time and frequency domains. Scattering from a handball (a rubber, hollow spherical shell) is also considered, and results are compared to those from solid spheres. Experimentally acquired results are compared to several theoretic models, including the Kirchhoff approximation, partial wave series solutions, ray theory, and finite element simulations. The Kirchhoff approximation has previously been applied to backscattering from a rigid cylinder at a free surface [K. Baik and P.L. Marston, IEEE Journal of Oceanic Engineering 33, 386-396 (2008)], and the analogous process for a rigid sphere is developed here. Scattering path contributions are identified based on timing models and frequency content, and target elastic resonances and interference phenomena are discussed. Two different interfaces are considered in experiments and models: an air-water interface (free surface) and a sand-water interface. Comparisons and distinctions are made between the results at the two interfaces, which are shown to become similar in the low grazing angle limit. Smooth, continuous transitions in scattering amplitude are shown to correlate with scattering path coupling points becoming exposed as the target is lowered through the interface. Scattering in the low target exposure limit is shown to be dominated by Franz wave contributions (surface-guided, nonelastic waves). This contrasts with high exposure and free field scattering signatures from spheres and cylinders, in which the Franz contribution is highly diminished and is not a significant contributor. Bistatic scattering from free field spheres and cylinders is also considered, in the context of understanding the bistatic scattering paths from these targets at partial exposure through an interface. Results from this work have direct applications to understanding the scattering from partially exposed objects resting on or buried within a seafloor environment. [Work supported by the Office of Naval Research.]

Author: Naum D. Veksler
Publisher: Springer Science & Business Media
ISBN: 3642847951
Category : Science
Languages : en
Pages : 292

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Book Description
Resonance Acoustic Spectroscopy deals with the analysis of waves generated in an elastic body by a plane harmonic acoustic wave. It is the first monograph to treat new analytical and experimental methods for the investigation of the excitation, propagation and re-radiation of elastic waves in solid, thick-walled and thin-walled elastic scatterers.The material is presented systematically, comprising the formulation of the problem, method of solution, algorithm, computation and analysis. A large number of computational results are given in the form of modal resonances, form functions, dispersion curves and acoustic spectrograms. Particular attention is paid to the interpretation of the solutions.