FMBEM analysis of sound scattering from a damping plate in the near field of a hydrophone.
As part of research into the effect of underwater noise on the communication between an under-ice Autonomous Underwater Vehicle (AUV) and it’s stationary launch vessel (the Aurora Australis), fast multipole boundary element method (FMBEM) acoustic modeling was conducted. In particular, a steel dampi...
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2012
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ftcurtin:oai:espace.curtin.edu.au:20.500.11937/33561 2023-06-11T04:10:22+02:00 FMBEM analysis of sound scattering from a damping plate in the near field of a hydrophone. Wilkes, Daniel Alexander, P. Duncan, Alexander Terrance McMinn 2012 fulltext https://hdl.handle.net/20.500.11937/33561 unknown Acoustical Society of Australia http://www.acoustics.asn.au/conference_proceedings/AAS2012/papers/p70.pdf http://hdl.handle.net/20.500.11937/33561 communication underwater under-ice AUV noise Conference Paper 2012 ftcurtin https://doi.org/20.500.11937/33561 2023-05-30T19:37:41Z As part of research into the effect of underwater noise on the communication between an under-ice Autonomous Underwater Vehicle (AUV) and it’s stationary launch vessel (the Aurora Australis), fast multipole boundary element method (FMBEM) acoustic modeling was conducted. In particular, a steel damping plate with a complex 3-dimensional structure was modeled (using up to 1.6 x 10 5 boundary elements) and the effect of sound scattering from a pinger near the ship was determined at the receiver hydrophone, which was in close proximity to the damping plate. The direct incident field from the pinger was modeled as a plane wave at a number of incidence angles (to account for the depths to which the hydrophone was lowered) and over a range of frequencies up to the pinger frequency of 10kHz. This paper presents these results and discusses some of the interesting effects observed at the ‘non-unique’ frequencies when using the different methods available to provide stability to the numerical solution. Thus far, the modeling conducted for the damping plate has treated the object as rigid. The FMBEM code being developed at CMST now has the capability to model fully coupled fluid-structure interactions and some initial results from treating the damping plate as elastic are also presented. Conference Object aurora australis Curtin University: espace |
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Curtin University: espace |
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topic |
communication underwater under-ice AUV noise |
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communication underwater under-ice AUV noise Wilkes, Daniel Alexander, P. Duncan, Alexander FMBEM analysis of sound scattering from a damping plate in the near field of a hydrophone. |
topic_facet |
communication underwater under-ice AUV noise |
description |
As part of research into the effect of underwater noise on the communication between an under-ice Autonomous Underwater Vehicle (AUV) and it’s stationary launch vessel (the Aurora Australis), fast multipole boundary element method (FMBEM) acoustic modeling was conducted. In particular, a steel damping plate with a complex 3-dimensional structure was modeled (using up to 1.6 x 10 5 boundary elements) and the effect of sound scattering from a pinger near the ship was determined at the receiver hydrophone, which was in close proximity to the damping plate. The direct incident field from the pinger was modeled as a plane wave at a number of incidence angles (to account for the depths to which the hydrophone was lowered) and over a range of frequencies up to the pinger frequency of 10kHz. This paper presents these results and discusses some of the interesting effects observed at the ‘non-unique’ frequencies when using the different methods available to provide stability to the numerical solution. Thus far, the modeling conducted for the damping plate has treated the object as rigid. The FMBEM code being developed at CMST now has the capability to model fully coupled fluid-structure interactions and some initial results from treating the damping plate as elastic are also presented. |
author2 |
Terrance McMinn |
format |
Conference Object |
author |
Wilkes, Daniel Alexander, P. Duncan, Alexander |
author_facet |
Wilkes, Daniel Alexander, P. Duncan, Alexander |
author_sort |
Wilkes, Daniel |
title |
FMBEM analysis of sound scattering from a damping plate in the near field of a hydrophone. |
title_short |
FMBEM analysis of sound scattering from a damping plate in the near field of a hydrophone. |
title_full |
FMBEM analysis of sound scattering from a damping plate in the near field of a hydrophone. |
title_fullStr |
FMBEM analysis of sound scattering from a damping plate in the near field of a hydrophone. |
title_full_unstemmed |
FMBEM analysis of sound scattering from a damping plate in the near field of a hydrophone. |
title_sort |
fmbem analysis of sound scattering from a damping plate in the near field of a hydrophone. |
publisher |
Acoustical Society of Australia |
publishDate |
2012 |
url |
https://hdl.handle.net/20.500.11937/33561 |
genre |
aurora australis |
genre_facet |
aurora australis |
op_relation |
http://www.acoustics.asn.au/conference_proceedings/AAS2012/papers/p70.pdf http://hdl.handle.net/20.500.11937/33561 |
op_doi |
https://doi.org/20.500.11937/33561 |
_version_ |
1768384737811890176 |