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Design of a multi-material acoustic black hole

Design of a multi-material acoustic black hole
Design of a multi-material acoustic black hole
Acoustic black holes (ABHs) have been proven as an effective passive vibration control measure. Typically, they are realised by introducing a geometric taper into a structure. This approach introduces thin structural sections which leaves the ABH prone to damage through mechanisms such as static failure or fatigue. An alternative approach has been suggested in which the material properties vary within the structure, which can be realised through multi-material additive manufacturing. This allows the structure to maintain a constant thickness and this may reduce the effect of fatigue. Prior work has been performed to characterise the materials currently available that would be suitable for the ABH application. This paper investigates methods of optimising the design ofthe multi-material ABH, in order to minimise the reflection coefficient in a beam termination application.
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Austin, Elizabeth Hannah
84deba14-6fb0-4285-84ee-a795502d998b
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Austin, Elizabeth Hannah
84deba14-6fb0-4285-84ee-a795502d998b
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc

Austin, Elizabeth Hannah and Cheer, Jordan (2022) Design of a multi-material acoustic black hole. In Proceedings of InterNoise 2022. 7 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Acoustic black holes (ABHs) have been proven as an effective passive vibration control measure. Typically, they are realised by introducing a geometric taper into a structure. This approach introduces thin structural sections which leaves the ABH prone to damage through mechanisms such as static failure or fatigue. An alternative approach has been suggested in which the material properties vary within the structure, which can be realised through multi-material additive manufacturing. This allows the structure to maintain a constant thickness and this may reduce the effect of fatigue. Prior work has been performed to characterise the materials currently available that would be suitable for the ABH application. This paper investigates methods of optimising the design ofthe multi-material ABH, in order to minimise the reflection coefficient in a beam termination application.
1.

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Published date: 21 August 2022

Identifiers

Local EPrints ID: 473506
URI: http://eprints.soton.ac.uk/id/eprint/473506
PURE UUID: 8ddabb38-895e-4076-9d7e-f69cb0b262fe
ORCID for Elizabeth Hannah Austin: ORCID iD orcid.org/0000-0002-8995-8391
ORCID for Jordan Cheer: ORCID iD orcid.org/0000-0002-0552-5506

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Date deposited: 20 Jan 2023 18:03
Last modified: 17 Mar 2024 04:09

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Contributors

Author: Elizabeth Hannah Austin ORCID iD
Author: Jordan Cheer ORCID iD

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