Probabilistic analysis of local ice loads on a lifeboat measured in full-scale field trials
This paper presents an analysis of local ice loads measured during full-scale field trials conducted in 2014 with a totally enclosed motor propelled survival craft (TEMPSC) in controlled pack ice conditions. These data were collected as part of an ongoing research program that aims to identify the l...
Published in: | Journal of Offshore Mechanics and Arctic Engineering |
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Format: | Article in Journal/Newspaper |
Language: | English |
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American Society of Mechnical Engineers
2015
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Online Access: | https://doi.org/10.1115/1.4030184 https://nrc-publications.canada.ca/eng/view/ft/?id=af839bbf-9248-4c2f-bef9-f8a3da466a23 https://nrc-publications.canada.ca/eng/view/object/?id=af839bbf-9248-4c2f-bef9-f8a3da466a23 https://nrc-publications.canada.ca/fra/voir/objet/?id=af839bbf-9248-4c2f-bef9-f8a3da466a23 |
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ftnrccanada:oai:cisti-icist.nrc-cnrc.ca:cistinparc:21275797 2023-05-15T14:22:31+02:00 Probabilistic analysis of local ice loads on a lifeboat measured in full-scale field trials Rahman, Md Samsur Taylor, Rocky S. Kennedy, Allison Ré, António Simões Veitch, Brian 2015-08-01 text https://doi.org/10.1115/1.4030184 https://nrc-publications.canada.ca/eng/view/ft/?id=af839bbf-9248-4c2f-bef9-f8a3da466a23 https://nrc-publications.canada.ca/eng/view/object/?id=af839bbf-9248-4c2f-bef9-f8a3da466a23 https://nrc-publications.canada.ca/fra/voir/objet/?id=af839bbf-9248-4c2f-bef9-f8a3da466a23 eng eng American Society of Mechnical Engineers issn:0892-7219 Journal of Offshore Mechanics and Arctic Engineering, Volume: 137, Issue: 4, Publication date: 2015-08-01 doi:10.1115/1.4030184 kinetics lifeboats sea ice different operating conditions exceedance probability full-scale field trials ice concentration pressure analysis probabilistic analysis risk-based design ice kinetic energy pack ice ship design article 2015 ftnrccanada https://doi.org/10.1115/1.4030184 2021-09-01T06:33:03Z This paper presents an analysis of local ice loads measured during full-scale field trials conducted in 2014 with a totally enclosed motor propelled survival craft (TEMPSC) in controlled pack ice conditions. These data were collected as part of an ongoing research program that aims to identify the limitations of conventional TEMPSC operating in sea ice environments and to provide insight as to how these limitations might be extended. During the 2014 trials, local ice loads were measured at two locations on the TEMPSC's bow area. These loads were the most severe measured to date and corresponded to an average ice floe mass that was approximately 1.25 times the mass of the fully loaded TEMPSC. The event-maximum method of local ice pressure analysis was used to analyze these field data to improve understanding of the nature of ice loads for such interactions and to evaluate the suitability of this approach for design load estimation for TEMPSCs (i.e., lifeboats) in ice. The event-maximum method was adapted for the present application, so as to link exceedance probabilities with design load levels for a given scenario. Comparison of the 2014 results with a previous analysis of 2013 field trials data supports earlier conclusions that these interactions are highly influenced by kinetic energy, since more massive ice floes are observed to impart significantly higher loads on the lifeboats. Illustrative examples examining the influence of ice concentration and sail-away distance have also been provided. The work establishes links between extreme loads and the exposure of the lifeboat to ice for different operating conditions. Based on this work it is concluded that the event-maximum method provides a promising approach for establishing risk-based design criteria for lifeboats if field data are available which adequately represent ice conditions encountered during the design life of the lifeboat. Peer reviewed: Yes NRC publication: Yes Article in Journal/Newspaper Arctic Sea ice National Research Council Canada: NRC Publications Archive Journal of Offshore Mechanics and Arctic Engineering 137 4 |
institution |
Open Polar |
collection |
National Research Council Canada: NRC Publications Archive |
op_collection_id |
ftnrccanada |
language |
English |
topic |
kinetics lifeboats sea ice different operating conditions exceedance probability full-scale field trials ice concentration pressure analysis probabilistic analysis risk-based design ice kinetic energy pack ice ship design |
spellingShingle |
kinetics lifeboats sea ice different operating conditions exceedance probability full-scale field trials ice concentration pressure analysis probabilistic analysis risk-based design ice kinetic energy pack ice ship design Rahman, Md Samsur Taylor, Rocky S. Kennedy, Allison Ré, António Simões Veitch, Brian Probabilistic analysis of local ice loads on a lifeboat measured in full-scale field trials |
topic_facet |
kinetics lifeboats sea ice different operating conditions exceedance probability full-scale field trials ice concentration pressure analysis probabilistic analysis risk-based design ice kinetic energy pack ice ship design |
description |
This paper presents an analysis of local ice loads measured during full-scale field trials conducted in 2014 with a totally enclosed motor propelled survival craft (TEMPSC) in controlled pack ice conditions. These data were collected as part of an ongoing research program that aims to identify the limitations of conventional TEMPSC operating in sea ice environments and to provide insight as to how these limitations might be extended. During the 2014 trials, local ice loads were measured at two locations on the TEMPSC's bow area. These loads were the most severe measured to date and corresponded to an average ice floe mass that was approximately 1.25 times the mass of the fully loaded TEMPSC. The event-maximum method of local ice pressure analysis was used to analyze these field data to improve understanding of the nature of ice loads for such interactions and to evaluate the suitability of this approach for design load estimation for TEMPSCs (i.e., lifeboats) in ice. The event-maximum method was adapted for the present application, so as to link exceedance probabilities with design load levels for a given scenario. Comparison of the 2014 results with a previous analysis of 2013 field trials data supports earlier conclusions that these interactions are highly influenced by kinetic energy, since more massive ice floes are observed to impart significantly higher loads on the lifeboats. Illustrative examples examining the influence of ice concentration and sail-away distance have also been provided. The work establishes links between extreme loads and the exposure of the lifeboat to ice for different operating conditions. Based on this work it is concluded that the event-maximum method provides a promising approach for establishing risk-based design criteria for lifeboats if field data are available which adequately represent ice conditions encountered during the design life of the lifeboat. Peer reviewed: Yes NRC publication: Yes |
format |
Article in Journal/Newspaper |
author |
Rahman, Md Samsur Taylor, Rocky S. Kennedy, Allison Ré, António Simões Veitch, Brian |
author_facet |
Rahman, Md Samsur Taylor, Rocky S. Kennedy, Allison Ré, António Simões Veitch, Brian |
author_sort |
Rahman, Md Samsur |
title |
Probabilistic analysis of local ice loads on a lifeboat measured in full-scale field trials |
title_short |
Probabilistic analysis of local ice loads on a lifeboat measured in full-scale field trials |
title_full |
Probabilistic analysis of local ice loads on a lifeboat measured in full-scale field trials |
title_fullStr |
Probabilistic analysis of local ice loads on a lifeboat measured in full-scale field trials |
title_full_unstemmed |
Probabilistic analysis of local ice loads on a lifeboat measured in full-scale field trials |
title_sort |
probabilistic analysis of local ice loads on a lifeboat measured in full-scale field trials |
publisher |
American Society of Mechnical Engineers |
publishDate |
2015 |
url |
https://doi.org/10.1115/1.4030184 https://nrc-publications.canada.ca/eng/view/ft/?id=af839bbf-9248-4c2f-bef9-f8a3da466a23 https://nrc-publications.canada.ca/eng/view/object/?id=af839bbf-9248-4c2f-bef9-f8a3da466a23 https://nrc-publications.canada.ca/fra/voir/objet/?id=af839bbf-9248-4c2f-bef9-f8a3da466a23 |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
issn:0892-7219 Journal of Offshore Mechanics and Arctic Engineering, Volume: 137, Issue: 4, Publication date: 2015-08-01 doi:10.1115/1.4030184 |
op_doi |
https://doi.org/10.1115/1.4030184 |
container_title |
Journal of Offshore Mechanics and Arctic Engineering |
container_volume |
137 |
container_issue |
4 |
_version_ |
1766295085284065280 |