Design of elliptical underwater acoustic cloak with truss-latticed pentamode materials

Yuanyuan Ge; Xiaoning Liu; Gengkai Hu

doi:10.1016/j.taml.2022.100346

Design of elliptical underwater acoustic cloak with truss-latticed pentamode materials

Yuanyuan Ge, Xiaoning Liu^*, Gengkai Hu

^*Corresponding author for this work

School of Aerospace Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Pentamode acoustic cloak is promising for underwater sound control due to its solid nature and broadband efficiency, however its realization is only limited to simple cylindrical shape. In this work, we established a set of techniques for the microstructure design of elliptical pentamode acoustic cloak based on truss lattice model, including the inverse design of unit cell and algorithms for latticed cloak assembly. The designed cloak was numerically validated by the well wave concealing performance. The work proves that more general pentamode acoustic wave devices beyond simple cylindrical geometry are theoretically feasible, and sheds light on more practical design for waterborne sound manipulation.

Original language	English
Article number	100346
Journal	Theoretical and Applied Mechanics Letters
Volume	12
Issue number	4
DOIs	https://doi.org/10.1016/j.taml.2022.100346
Publication status	Published - May 2022

Keywords

Elliptical acoustic cloak
Microstructure design
Pentamode material
Truss lattice

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10.1016/j.taml.2022.100346

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title = "Design of elliptical underwater acoustic cloak with truss-latticed pentamode materials",

abstract = "Pentamode acoustic cloak is promising for underwater sound control due to its solid nature and broadband efficiency, however its realization is only limited to simple cylindrical shape. In this work, we established a set of techniques for the microstructure design of elliptical pentamode acoustic cloak based on truss lattice model, including the inverse design of unit cell and algorithms for latticed cloak assembly. The designed cloak was numerically validated by the well wave concealing performance. The work proves that more general pentamode acoustic wave devices beyond simple cylindrical geometry are theoretically feasible, and sheds light on more practical design for waterborne sound manipulation.",

keywords = "Elliptical acoustic cloak, Microstructure design, Pentamode material, Truss lattice",

author = "Yuanyuan Ge and Xiaoning Liu and Gengkai Hu",

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AU - Ge, Yuanyuan

AU - Liu, Xiaoning

AU - Hu, Gengkai

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Y1 - 2022/5

N2 - Pentamode acoustic cloak is promising for underwater sound control due to its solid nature and broadband efficiency, however its realization is only limited to simple cylindrical shape. In this work, we established a set of techniques for the microstructure design of elliptical pentamode acoustic cloak based on truss lattice model, including the inverse design of unit cell and algorithms for latticed cloak assembly. The designed cloak was numerically validated by the well wave concealing performance. The work proves that more general pentamode acoustic wave devices beyond simple cylindrical geometry are theoretically feasible, and sheds light on more practical design for waterborne sound manipulation.

AB - Pentamode acoustic cloak is promising for underwater sound control due to its solid nature and broadband efficiency, however its realization is only limited to simple cylindrical shape. In this work, we established a set of techniques for the microstructure design of elliptical pentamode acoustic cloak based on truss lattice model, including the inverse design of unit cell and algorithms for latticed cloak assembly. The designed cloak was numerically validated by the well wave concealing performance. The work proves that more general pentamode acoustic wave devices beyond simple cylindrical geometry are theoretically feasible, and sheds light on more practical design for waterborne sound manipulation.

KW - Elliptical acoustic cloak

KW - Microstructure design

KW - Pentamode material

KW - Truss lattice

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JO - Theoretical and Applied Mechanics Letters

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Design of elliptical underwater acoustic cloak with truss-latticed pentamode materials

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Keywords

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