Acoustic Interactions with Submerged Elastic Structures

The interaction of acoustic fields with submerged elastic structures, both by propagation and scattering, is being investigated at various institutions and laboratories world-wide with ever-increasing sophistication of experiments and analysis. This book offers a collection of contributions from these research centers that represent the present state-of-the-art in the study of acoustic elastic interaction, being on the cutting edge of these investigations. This includes the description of acoustic scattering from submerged elastic objects and shells by the Resonance Scattering Theory of Flax, Dragonette and Überall, and the interaction of these phenomena in terms of interface waves. It also includes the use of this theory for the purpose of inverse scattering; i.e. the determination of the scattered objects properties from the received acoustic backscattered signals. The problem of acoustically excited waves in inhomogeneous and anisotropic materials and of inhomogeneous propagating waves is considered. Vibrations and resonances of elastic shells, including shells with various kinds of internal attachments, are analyzed. Acoustic scattering experiments are described in the time domain, and on the basis of the Wigner-Ville distribution. Acoustic propagation in the water column over elastic boundaries is studied experimentally both in laboratory tanks, and in the field, and is analyzed theoretically. Ultrasonic nondestructive testing, including such aspects like probe modeling, scattering by various types of cracks, receiving probes and calibration by a side-drilled hole is also studied in details. Content: Front Matter • Preface • Table of Contents 1. The Resonances: From Nuclear Physics to Underwater Acoustics 2. RST and Peripheral Waves 3. Acoustic Scattering from Internally Loaded Cylindrical Shells 4. Scattering by Cylindrical Objects at Oblique Incidence 5. Nonspecular Reflection-Transmission Phenomena of Bounded Beams Described by Inhomogeneous Plane Waves 6. Reflection and Refraction of the Inhomogeneous Plane Wave 7. Theory of the Acoustic Bounded Beam 8. Sound Scattering by a Fluid-Loaded Cylindrical Shell with an Internal Axial Stiffener 9. Interferences in Elastic Plates 10. Vibrations of Shells Contacting Fluid: Asymptotic Analysis • Program of the Symposium in Honor of Professor Herbert Überall Subject Index Author Index • About the Editors