Acoustic Invisibility for Elliptic Objects : Theory and Experiments for Underwater Sound

Francesco Braghin

ISBN 10: 303122602X / ISBN 13: 9783031226021

Edité par Springer Nature Switzerland, 2023

A propos de cet article

Druck auf Anfrage Neuware - Printed after ordering - 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.

N° de réf. du vendeur 9783031226021

Détails bibliographiques

• Titre: Acoustic Invisibility for Elliptic Objects : Theory and Experiments for Underwater Sound
• Éditeur: Springer Nature Switzerland
• Date de parution: 2023
• Langue: anglais
• ISBN à 10 chiffres: 303122602X
• ISBN à 13 chiffres: 9783031226021
• Reliure: Taschenbuch
• État de l'article: Neu
• Dimensions: 235 L x 155 H x 6 P (en millimètres) 235 millimètres de largeur par 155 millimètres de hauteur par 6 millimètres de profondeur
• Poids: 184 grammes

A propos de ce titre

Synopsis

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.