Acoustic Invisibility for Elliptic Objects

Theory and Experiments for Underwater Sound

Davide Enrico Quadrelli, Francesco Braghin (Autoren)

Buch | Softcover

IX, 87 Seiten

2023 | 1st ed. 2023
Springer International Publishing (Verlag)
978-3-031-22602-1 (ISBN)

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The book investigates acoustic cloaking for elliptical targets, starting from the development of a systematic approach to deal with such non-axisymmetrical shapes by adopting transformation acoustics in elliptic coordinates, and concluding with numerical and experimental validation of a microstructured cloak in the underwater environment. The book thus comprises all the steps from theory to practice that led to the first experimental validation of acoustic invisibility for non-cylindrical objects, whose results are presented in the last chapter. Indeed, despite Transformation Theory is now an established tool to design material distributions capable to unlock the design of invisibility devices, it is not trivial to apply it for shapes different than the sphere and the cylinder, which are thus the ones mainly addressed in the literature. This book paves the way for exploration of other shapes, demonstrating the effectiveness of a pentamode cloak in reducing the acoustic visibility of anelliptical target, and discussing design choices that can make the implementation of the required microstructure less cumbersome despite the lack of axial symmetry of the problem, from both the numerical and manufacturing point of views.

Erscheinungsdatum	01.02.2023
Reihe/Serie	PoliMI SpringerBriefs
Reihe/Serie	SpringerBriefs in Applied Sciences and Technology
Zusatzinfo	IX, 87 p. 38 illus., 34 illus. in color.
Verlagsort	Cham
Sprache	englisch
Maße	155 x 235 mm
Gewicht	183 g
Themenwelt	Technik ► Maschinenbau
Schlagworte	acoustic cloaking • Arbitrary Shape • Elliptical Target • Elliptic Coordinates • metamaterials • Transformation Acoustics
ISBN-10	3-031-22602-X / 303122602X
ISBN-13	978-3-031-22602-1 / 9783031226021
Zustand	Neuware