The effect of active vibration control on the sound field scattered from a flexible structure
The effect of active vibration control on the sound field scattered from a flexible structure
It is desirable, in many applications, to minimise the acoustic scattering from an object when it is subject to an incident sound field. Active Vibration Control (AVC) has been demonstrated in many applications, and can effectively reduce an unwanted disturbance signal using control sources. However, when attempting to attenuate the acoustic scattering from an object, it is not straightforward to measure, and therefore control, the scattered component of the sound field directly. In this paper, the effect that AVC has on the scattered acoustic field has been investigated for a hollow, non-rigid cylinder via a series of numerical simulations. The cylinder is excited by an acoustic plane wave incident from a single direction and the AVC system uses an array of accelerometers and an array of structural actuators to control the vibration. As expected, significant reductions in the structural velocity are predicted. The effect of AVC on the acoustic scattering is then investigated, and it is shown that, at resonance, the scattered sound power is reduced by over 5dB.
Acoustic, Scattering, Active Control, Vibration, Cylinder, Modes, ISMA
House, Charlie
15d5f04a-da71-4435-9b8c-6bf50d8e7908
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
17 September 2018
House, Charlie
15d5f04a-da71-4435-9b8c-6bf50d8e7908
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
House, Charlie, Cheer, Jordan and Daley, Stephen
(2018)
The effect of active vibration control on the sound field scattered from a flexible structure.
International Conference on Noise & Vibration Engineering (ISMA) 2018, , Leuven, Belgium.
17 - 19 Sep 2018.
13 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
It is desirable, in many applications, to minimise the acoustic scattering from an object when it is subject to an incident sound field. Active Vibration Control (AVC) has been demonstrated in many applications, and can effectively reduce an unwanted disturbance signal using control sources. However, when attempting to attenuate the acoustic scattering from an object, it is not straightforward to measure, and therefore control, the scattered component of the sound field directly. In this paper, the effect that AVC has on the scattered acoustic field has been investigated for a hollow, non-rigid cylinder via a series of numerical simulations. The cylinder is excited by an acoustic plane wave incident from a single direction and the AVC system uses an array of accelerometers and an array of structural actuators to control the vibration. As expected, significant reductions in the structural velocity are predicted. The effect of AVC on the acoustic scattering is then investigated, and it is shown that, at resonance, the scattered sound power is reduced by over 5dB.
Text
ISMA Paper
- Accepted Manuscript
More information
Accepted/In Press date: 30 July 2018
Published date: 17 September 2018
Venue - Dates:
International Conference on Noise & Vibration Engineering (ISMA) 2018, , Leuven, Belgium, 2018-09-17 - 2018-09-19
Keywords:
Acoustic, Scattering, Active Control, Vibration, Cylinder, Modes, ISMA
Identifiers
Local EPrints ID: 422933
URI: http://eprints.soton.ac.uk/id/eprint/422933
PURE UUID: 7bdd8fd5-4058-436c-ba9b-74b1f0019928
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Date deposited: 08 Aug 2018 16:30
Last modified: 16 Mar 2024 04:05
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