Experimental validation of a modified acoustic black hole profile
Experimental validation of a modified acoustic black hole profile
Acoustic Black Holes (ABHs) use modifications to a structure to reduce the structural wavespeed, which increases the effect of damping treatment applied in the ABH region, resulting in greater vibration attenuation. The most common type of ABH uses a gradually tapering thickness to reduce the wavespeed, resulting in part of the structure becoming very thin. Due to the focusing effects of the ABH, high amplitude vibrations occur in the thin part of the structure, and this raises concerns about vibration fatigue. This paper uses a numerical model to investigate the fatigue life of an ABH taper used to terminate a beam. A comparison is made between the results from a standard ABH taper and a modified ABH profile that aims to reduce fatigue while preserving vibration performance. Following this, the dynamic performance of both ABHs is assessed experimentally to validate the results from the numerical model.
Keys, Archie
be052521-bf0f-40c7-8e30-50deba927618
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
13 July 2023
Keys, Archie
be052521-bf0f-40c7-8e30-50deba927618
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Keys, Archie and Cheer, Jordan
(2023)
Experimental validation of a modified acoustic black hole profile.
29th International Congress on Sound and Vibration, , Prague, Czech Republic.
09 Jul - 13 Aug 2023.
8 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Acoustic Black Holes (ABHs) use modifications to a structure to reduce the structural wavespeed, which increases the effect of damping treatment applied in the ABH region, resulting in greater vibration attenuation. The most common type of ABH uses a gradually tapering thickness to reduce the wavespeed, resulting in part of the structure becoming very thin. Due to the focusing effects of the ABH, high amplitude vibrations occur in the thin part of the structure, and this raises concerns about vibration fatigue. This paper uses a numerical model to investigate the fatigue life of an ABH taper used to terminate a beam. A comparison is made between the results from a standard ABH taper and a modified ABH profile that aims to reduce fatigue while preserving vibration performance. Following this, the dynamic performance of both ABHs is assessed experimentally to validate the results from the numerical model.
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Published date: 13 July 2023
Venue - Dates:
29th International Congress on Sound and Vibration, , Prague, Czech Republic, 2023-07-09 - 2023-08-13
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Local EPrints ID: 480444
URI: http://eprints.soton.ac.uk/id/eprint/480444
PURE UUID: a03938b0-dbbb-46c9-a287-72ca7fb04b55
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Date deposited: 02 Aug 2023 16:42
Last modified: 18 Mar 2024 03:17
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Author:
Archie Keys
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