Underwater Acoustic Backscatter from a Model of Arctic Ice Open Leads and Pressure Ridges.
Behavior of monostatic backscatter from Arctic open leads and pressure ridges was studied using scale models in the laboratory under controlled conditions. Experiments were performed in an anechoic tank using pulsed transmissions from underwater point sources to measure the backscatter from several...
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ftdtic:ADA184693 2023-05-15T14:51:35+02:00 Underwater Acoustic Backscatter from a Model of Arctic Ice Open Leads and Pressure Ridges. Browne,Michael J NAVAL POSTGRADUATE SCHOOL MONTEREY CA 1987-06 text/html http://www.dtic.mil/docs/citations/ADA184693 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA184693 en eng http://www.dtic.mil/docs/citations/ADA184693 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Acoustics Snow Ice and Permafrost *ACOUSTIC SCATTERING *BACKSCATTERING *UNDERWATER ACOUSTICS UNDERICE RIDGES PRESSURE SEA ICE OPEN WATER TRAILING EDGES DIFFRACTION VIBRATION SOLIDS ENERGY CONVERSION ACOUSTIC MEASUREMENT MODEL TESTS PLATES ACRYLIC RESINS FLOATING BODIES SCALE MODELS LABORATORY TESTS ARCTIC REGIONS THESES Mode conversion Text 1987 ftdtic 2016-02-19T10:20:55Z Behavior of monostatic backscatter from Arctic open leads and pressure ridges was studied using scale models in the laboratory under controlled conditions. Experiments were performed in an anechoic tank using pulsed transmissions from underwater point sources to measure the backscatter from several different floating acrylic plate by the selection of the acrylic material, and the geometrical properties of the ice in features were accurately scaled by maintaining the appropriate dimension-to-wavelength ratios. The characteristic behavior of the backscatter was explained using both diffraction theory and mode-conversion concepts. It was generally observed that a significant amount of the incident acoustic energy resulted in solidborne vibrations and propagating waves within the floating plate. The ability of those vibrations to reradiate energy into the water resulted in greater backscatter than predicted from the trailing edge of an open lead and piston-like radiation from pressure rigid models. Text Arctic Ice permafrost Sea ice Defense Technical Information Center: DTIC Technical Reports database Arctic |
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Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Acoustics Snow Ice and Permafrost *ACOUSTIC SCATTERING *BACKSCATTERING *UNDERWATER ACOUSTICS UNDERICE RIDGES PRESSURE SEA ICE OPEN WATER TRAILING EDGES DIFFRACTION VIBRATION SOLIDS ENERGY CONVERSION ACOUSTIC MEASUREMENT MODEL TESTS PLATES ACRYLIC RESINS FLOATING BODIES SCALE MODELS LABORATORY TESTS ARCTIC REGIONS THESES Mode conversion |
spellingShingle |
Acoustics Snow Ice and Permafrost *ACOUSTIC SCATTERING *BACKSCATTERING *UNDERWATER ACOUSTICS UNDERICE RIDGES PRESSURE SEA ICE OPEN WATER TRAILING EDGES DIFFRACTION VIBRATION SOLIDS ENERGY CONVERSION ACOUSTIC MEASUREMENT MODEL TESTS PLATES ACRYLIC RESINS FLOATING BODIES SCALE MODELS LABORATORY TESTS ARCTIC REGIONS THESES Mode conversion Browne,Michael J Underwater Acoustic Backscatter from a Model of Arctic Ice Open Leads and Pressure Ridges. |
topic_facet |
Acoustics Snow Ice and Permafrost *ACOUSTIC SCATTERING *BACKSCATTERING *UNDERWATER ACOUSTICS UNDERICE RIDGES PRESSURE SEA ICE OPEN WATER TRAILING EDGES DIFFRACTION VIBRATION SOLIDS ENERGY CONVERSION ACOUSTIC MEASUREMENT MODEL TESTS PLATES ACRYLIC RESINS FLOATING BODIES SCALE MODELS LABORATORY TESTS ARCTIC REGIONS THESES Mode conversion |
description |
Behavior of monostatic backscatter from Arctic open leads and pressure ridges was studied using scale models in the laboratory under controlled conditions. Experiments were performed in an anechoic tank using pulsed transmissions from underwater point sources to measure the backscatter from several different floating acrylic plate by the selection of the acrylic material, and the geometrical properties of the ice in features were accurately scaled by maintaining the appropriate dimension-to-wavelength ratios. The characteristic behavior of the backscatter was explained using both diffraction theory and mode-conversion concepts. It was generally observed that a significant amount of the incident acoustic energy resulted in solidborne vibrations and propagating waves within the floating plate. The ability of those vibrations to reradiate energy into the water resulted in greater backscatter than predicted from the trailing edge of an open lead and piston-like radiation from pressure rigid models. |
author2 |
NAVAL POSTGRADUATE SCHOOL MONTEREY CA |
format |
Text |
author |
Browne,Michael J |
author_facet |
Browne,Michael J |
author_sort |
Browne,Michael J |
title |
Underwater Acoustic Backscatter from a Model of Arctic Ice Open Leads and Pressure Ridges. |
title_short |
Underwater Acoustic Backscatter from a Model of Arctic Ice Open Leads and Pressure Ridges. |
title_full |
Underwater Acoustic Backscatter from a Model of Arctic Ice Open Leads and Pressure Ridges. |
title_fullStr |
Underwater Acoustic Backscatter from a Model of Arctic Ice Open Leads and Pressure Ridges. |
title_full_unstemmed |
Underwater Acoustic Backscatter from a Model of Arctic Ice Open Leads and Pressure Ridges. |
title_sort |
underwater acoustic backscatter from a model of arctic ice open leads and pressure ridges. |
publishDate |
1987 |
url |
http://www.dtic.mil/docs/citations/ADA184693 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA184693 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice permafrost Sea ice |
genre_facet |
Arctic Ice permafrost Sea ice |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA184693 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766322717053681664 |