Hyrdoacoustic Ocean Exploration E-Book
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- Herausgeber: John Wiley & Sons
- Kategorie: Wissenschaft und neue Technologien
- Sprache: Englisch
The only book that offers a comprehensive and fully up-to-date coverage of hydroacoustic ocean exploration, this work deals with the diagnostics of non-uniformities in a water medium using the hydroacoustic parametric antenna. The non-uniformities of the water medium in the study are of geometrically regular shape, i.e., the shape of a sphere, a cylinder, and a spheroid. An account is given of theoretical and experimental studies of wave processes that occur in the event of the scattering of non-linearly interacting acoustic waves at a sphere, a cylinder, and a spheroid. Scattering problems are formulated; solutions to the inhomogeneous wave equation are found in the first and second approximations using the successive approximations method. For the first time, high-frequency asymptotic expressions of acoustic pressure for all spectral components of the secondary field are obtained for the nonlinear scattering problem. The scattering diagrams are calculated and plotted, and then analyzed and compared. Results of experimental studies of the parametric acoustic antenna field scattering at solid steel spheres are presented. Experimental scattering diagrams both for the parametric antenna pump waves and for the secondary field waves including the difference frequency wave, the sum frequency wave, and the second harmonic wave are presented. 3D modeling of wave processes is also considered. A must have for researchers and specialists in nonlinear hydroacoustics and ocean acoustics; it also may be of use for postgraduates and students specializing in hydroacoustics and ocean exploration.
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Seitenzahl: 211
Veröffentlichungsjahr: 2016
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Contents
Cover
Title page
Copyright page
Abstract
Introduction
Chapter 1: Scattering of Nonlinear Interacting Plane Acoustic Waves by a Sphere
1.1 Review of Studies Dealing with the Scattering of Plane Acoustic Waves by a Sphere
1.2 Problem Statement
1.3 Solving via the Inhomogeneous Equation with the Successive Approximations Method
1.4 Investigation of Acoustic Field of Difference Frequency
1.5 Investigation of Acoustical Field of the Sum Frequency Wave
1.6 Investigation of Acoustical Field of the Second Harmonics
1.7 Experimental Investigation Scattering of the Field of Acoustic Parametric Antenna by a Hard Sphere
1.8 A Comparative Analysis of Assumption and Experimental Scattering Diagrams for Secondary Field Waves
1.9 Conclusion
Chapter 2: Scattering of Nonlinear Interacting Plane Acoustic Waves by a Cylinder
2.1 Review of Plane Acoustic Waves Scattering by a Cylinder
2.2 Statement of Problem
2.3 Investigation of Acoustic Field of Difference Frequency
2.4 Investigation of Acoustic Field of Sum Frequency
2.5 Investigation of Acoustic Field of the Second Harmonic
2.6 Discussion and Comparison of Results
2.7 Conclusion
Chapter 3: Research of the Scattering of Nonlinear Interacting Plane Acoustic Waves by an Elongated Spheroid
3.1 Review of Plane Acoustic Waves Scattering by an Elongated Spheroid
3.2 Wave problems in Elongated Spheroidal Coordinates
3.3 Statement of Problem
3.4 Investigation of the Acoustic Field of Difference Frequency Wave
3.5 Investigation of the Acoustic Field of Sum Frequency
3.6 Investigation of the Acoustic Field of Second Harmonics
3.7 Discussion and Comparison of Results
3.8 Conclusion
References
Index
End User License Agreement
Guide
Cover
Copyright
Contents
Begin Reading
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