St. Marys River Ice Booms - Design Force Estimate and Field Measurements
A set of two ice booms with a 250-ft (76-m)-wide navigation opening between them was designed to stabilize the ice cover in the harbor at Sault Ste. Marie, Michigan and Ontario, and to reduce the ice losses associated with winter navigation of ships on the St. Marys River. The forces from natural ef...
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ftdtic:ADA037902 2023-05-15T16:37:13+02:00 St. Marys River Ice Booms - Design Force Estimate and Field Measurements Perham,Roscoe E COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H 1977-02 text/html http://www.dtic.mil/docs/citations/ADA037902 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA037902 en eng http://www.dtic.mil/docs/citations/ADA037902 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Snow Ice and Permafrost *NAVIGATION *RIVERS *ICE PREVENTION DISTRIBUTION LOADS(FORCES) PIPES WINTER BARRIERS FORCE(MECHANICS) BOOMS(EQUIPMENT) INLAND WATERWAYS MECHANICAL CABLES *Ice booms St Marys River(Michigan and Ontario) Text 1977 ftdtic 2016-02-20T12:27:52Z A set of two ice booms with a 250-ft (76-m)-wide navigation opening between them was designed to stabilize the ice cover in the harbor at Sault Ste. Marie, Michigan and Ontario, and to reduce the ice losses associated with winter navigation of ships on the St. Marys River. The forces from natural effects on the ice cover were predicted using existing theory and physical data for the area. The forces in the boom structure resulting from ice cover and boom interaction were estimated. When the ice booms were installed, force measurement systems were put into selected anchor cables. These systems were operated all winter in conjunction with a modest program of supplemental data gathering. The force data exhibited periods when the force distribution was in good agreement with predictions and periods when the effect of the ice on the booms differed substantially from predictions. Sometimes passing ships had a substantial effect on the ice cover and the boom loads, and at other times, the effect was negligible. The direction of travel made little difference on average peak loads. The maximum loads on the booms resulted from natural occurrences. Text Ice permafrost Defense Technical Information Center: DTIC Technical Reports database St. Marys River ENVELOPE(-55.839,-55.839,52.312,52.312) |
institution |
Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost *NAVIGATION *RIVERS *ICE PREVENTION DISTRIBUTION LOADS(FORCES) PIPES WINTER BARRIERS FORCE(MECHANICS) BOOMS(EQUIPMENT) INLAND WATERWAYS MECHANICAL CABLES *Ice booms St Marys River(Michigan and Ontario) |
spellingShingle |
Snow Ice and Permafrost *NAVIGATION *RIVERS *ICE PREVENTION DISTRIBUTION LOADS(FORCES) PIPES WINTER BARRIERS FORCE(MECHANICS) BOOMS(EQUIPMENT) INLAND WATERWAYS MECHANICAL CABLES *Ice booms St Marys River(Michigan and Ontario) Perham,Roscoe E St. Marys River Ice Booms - Design Force Estimate and Field Measurements |
topic_facet |
Snow Ice and Permafrost *NAVIGATION *RIVERS *ICE PREVENTION DISTRIBUTION LOADS(FORCES) PIPES WINTER BARRIERS FORCE(MECHANICS) BOOMS(EQUIPMENT) INLAND WATERWAYS MECHANICAL CABLES *Ice booms St Marys River(Michigan and Ontario) |
description |
A set of two ice booms with a 250-ft (76-m)-wide navigation opening between them was designed to stabilize the ice cover in the harbor at Sault Ste. Marie, Michigan and Ontario, and to reduce the ice losses associated with winter navigation of ships on the St. Marys River. The forces from natural effects on the ice cover were predicted using existing theory and physical data for the area. The forces in the boom structure resulting from ice cover and boom interaction were estimated. When the ice booms were installed, force measurement systems were put into selected anchor cables. These systems were operated all winter in conjunction with a modest program of supplemental data gathering. The force data exhibited periods when the force distribution was in good agreement with predictions and periods when the effect of the ice on the booms differed substantially from predictions. Sometimes passing ships had a substantial effect on the ice cover and the boom loads, and at other times, the effect was negligible. The direction of travel made little difference on average peak loads. The maximum loads on the booms resulted from natural occurrences. |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H |
format |
Text |
author |
Perham,Roscoe E |
author_facet |
Perham,Roscoe E |
author_sort |
Perham,Roscoe E |
title |
St. Marys River Ice Booms - Design Force Estimate and Field Measurements |
title_short |
St. Marys River Ice Booms - Design Force Estimate and Field Measurements |
title_full |
St. Marys River Ice Booms - Design Force Estimate and Field Measurements |
title_fullStr |
St. Marys River Ice Booms - Design Force Estimate and Field Measurements |
title_full_unstemmed |
St. Marys River Ice Booms - Design Force Estimate and Field Measurements |
title_sort |
st. marys river ice booms - design force estimate and field measurements |
publishDate |
1977 |
url |
http://www.dtic.mil/docs/citations/ADA037902 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA037902 |
long_lat |
ENVELOPE(-55.839,-55.839,52.312,52.312) |
geographic |
St. Marys River |
geographic_facet |
St. Marys River |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA037902 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766027519805358080 |