Title: Total-internal reflection elastic metasurfaces: design and application

Abstract

An acoustic shield for protecting a vibrational sensitive device includes a first unit cell and a second unit cell. The first unit cell includes a first locally resonant unit. The first locally resonant unit controls a first phase gradient and the first unit cell includes a first surface. The second unit cell includes a second surface proximate to the first surface. The second unit cell includes a second locally resonant unit embedded along the second interface. The second locally resonant unit controls a second phase gradient. The first phase gradient is different from the second phase gradient. The first unit cell and the second unit cell comprise a super cell. The acoustic shield is configured such that a vibrational wave from a first side of the super cell to a second side of the super cell is substantially attenuated.

Inventors:

Walsh, Timothy; Semperlotti, Fabio; Zhu, Hongfei

Issue Date:

Tue May 24 00:00:00 EDT 2022

Research Org.:

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Purdue Univ., West Lafayette, IN (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:

1892957

Patent Number(s):

11339845

Application Number:

16/413,441

Assignee:

National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM); Purdue Research Foundation (West Lafayette, IN)

Patent Classifications (CPCs):

F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16F - SPRINGS

G - PHYSICS G10 - MUSICAL INSTRUMENTS G10K - SOUND-PRODUCING DEVICES

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F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16F - SPRINGS

F16F9/306 - {of the constrained layer type, i.e. comprising one or more constrained viscoelastic layers}

G - PHYSICS G10 - MUSICAL INSTRUMENTS G10K - SOUND-PRODUCING DEVICES

G10K11/168 - Plural layers of different materials, e.g. sandwiches
G10K11/172 - using resonance effects

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DOE Contract Number:  

NA0003525

Resource Type:

Patent

Resource Relation:

Patent File Date: 05/15/2019

Country of Publication:

United States

Language:

English