Load distributions in the ice-structure interaction process in shallow water
Model-scale experiments were performed to explore the process of level ice interacting with a, in model-scale, ten-meter-wide inclined structure in shallow water. During each experiment, an initially intact ice sheet was pushed against the sloping structure, failed against it and accumulated into a...
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Online Access: | https://aaltodoc.aalto.fi/handle/123456789/117822 https://doi.org/10.1016/j.oceaneng.2022.111730 |
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ftaaltouniv:oai:aaltodoc.aalto.fi:123456789/117822 2023-05-15T16:41:34+02:00 Load distributions in the ice-structure interaction process in shallow water Lemstrom, Ida Polojarvi, Arttu Puolakka, Otto Tuhkuri, Jukka Department of Mechanical Engineering Solid Mechanics Aalto Ice Tank Aalto-yliopisto Aalto University 2022-08-15 application/pdf https://aaltodoc.aalto.fi/handle/123456789/117822 https://doi.org/10.1016/j.oceaneng.2022.111730 en eng Elsevier Ltd Ocean Engineering Volume 258 Lemstrom , I , Polojarvi , A , Puolakka , O & Tuhkuri , J 2022 , ' Load distributions in the ice-structure interaction process in shallow water ' , Ocean Engineering , vol. 258 , 111730 . https://doi.org/10.1016/j.oceaneng.2022.111730 0029-8018 1873-5258 PURE UUID: 6614c1e4-bcaf-4d66-9fa0-24690b68a982 PURE ITEMURL: https://research.aalto.fi/en/publications/6614c1e4-bcaf-4d66-9fa0-24690b68a982 PURE FILEURL: https://research.aalto.fi/files/92429738/1_s2.0_S0029801822010812_main.pdf https://aaltodoc.aalto.fi/handle/123456789/117822 URN:NBN:fi:aalto-202211236582 doi:10.1016/j.oceaneng.2022.111730 openAccess Ice-structure interaction Ice load Ice load distribution Model-scale experiments Offshore structures TESTS A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä publishedVersion 2022 ftaaltouniv https://doi.org/10.1016/j.oceaneng.2022.111730 2022-12-15T19:35:22Z Model-scale experiments were performed to explore the process of level ice interacting with a, in model-scale, ten-meter-wide inclined structure in shallow water. During each experiment, an initially intact ice sheet was pushed against the sloping structure, failed against it and accumulated into a grounded rubble pile in front of it. The strength of the model ice used in the experiments was varied. The spatial and temporal ice load distributions were measured at two scales: the structure was divided into ten identical segments along its waterline with the horizontal load on each segment measured, while the local pressure distributions were simultaneously measured with tactile sensors from two of the segments. This paper focuses on the relationships between the loads on different segments and the correlation between global and local loads. The load records of the individual segments during the whole experiment correlated with each other. The Pearson correlation coefficient for the load records of two neighboring segments was about 0.8, and for segments having a distance of 5 m or more, about 0.4. The magnitudes of both the maximum and the mean load on each segment were approximately equal. Even if the segment loads correlated during the whole experiment, the load records of the individual segments showed also transient ice load peaks, which did not correlate. These were used to define local peak load events and related local line loads, defined by dividing the magnitude of a peak load by its width in space. Roughly 2/3 of the local peak load events concentrated on one segment and only about 5% of them covered more than three segments. Narrow local peak load events caused the local line loads of the highest magnitude, with the magnitude and the relative frequency of the events increasing with the ice strength. Narrow events resulted in local line loads up to four times higher than the global line load, which was defined by dividing the total load on the structure by its width. The investigation of the local peak ... Article in Journal/Newspaper Ice Sheet Aalto University Publication Archive (Aaltodoc) Ocean Engineering 258 111730 |
institution |
Open Polar |
collection |
Aalto University Publication Archive (Aaltodoc) |
op_collection_id |
ftaaltouniv |
language |
English |
topic |
Ice-structure interaction Ice load Ice load distribution Model-scale experiments Offshore structures TESTS |
spellingShingle |
Ice-structure interaction Ice load Ice load distribution Model-scale experiments Offshore structures TESTS Lemstrom, Ida Polojarvi, Arttu Puolakka, Otto Tuhkuri, Jukka Load distributions in the ice-structure interaction process in shallow water |
topic_facet |
Ice-structure interaction Ice load Ice load distribution Model-scale experiments Offshore structures TESTS |
description |
Model-scale experiments were performed to explore the process of level ice interacting with a, in model-scale, ten-meter-wide inclined structure in shallow water. During each experiment, an initially intact ice sheet was pushed against the sloping structure, failed against it and accumulated into a grounded rubble pile in front of it. The strength of the model ice used in the experiments was varied. The spatial and temporal ice load distributions were measured at two scales: the structure was divided into ten identical segments along its waterline with the horizontal load on each segment measured, while the local pressure distributions were simultaneously measured with tactile sensors from two of the segments. This paper focuses on the relationships between the loads on different segments and the correlation between global and local loads. The load records of the individual segments during the whole experiment correlated with each other. The Pearson correlation coefficient for the load records of two neighboring segments was about 0.8, and for segments having a distance of 5 m or more, about 0.4. The magnitudes of both the maximum and the mean load on each segment were approximately equal. Even if the segment loads correlated during the whole experiment, the load records of the individual segments showed also transient ice load peaks, which did not correlate. These were used to define local peak load events and related local line loads, defined by dividing the magnitude of a peak load by its width in space. Roughly 2/3 of the local peak load events concentrated on one segment and only about 5% of them covered more than three segments. Narrow local peak load events caused the local line loads of the highest magnitude, with the magnitude and the relative frequency of the events increasing with the ice strength. Narrow events resulted in local line loads up to four times higher than the global line load, which was defined by dividing the total load on the structure by its width. The investigation of the local peak ... |
author2 |
Department of Mechanical Engineering Solid Mechanics Aalto Ice Tank Aalto-yliopisto Aalto University |
format |
Article in Journal/Newspaper |
author |
Lemstrom, Ida Polojarvi, Arttu Puolakka, Otto Tuhkuri, Jukka |
author_facet |
Lemstrom, Ida Polojarvi, Arttu Puolakka, Otto Tuhkuri, Jukka |
author_sort |
Lemstrom, Ida |
title |
Load distributions in the ice-structure interaction process in shallow water |
title_short |
Load distributions in the ice-structure interaction process in shallow water |
title_full |
Load distributions in the ice-structure interaction process in shallow water |
title_fullStr |
Load distributions in the ice-structure interaction process in shallow water |
title_full_unstemmed |
Load distributions in the ice-structure interaction process in shallow water |
title_sort |
load distributions in the ice-structure interaction process in shallow water |
publisher |
Elsevier Ltd |
publishDate |
2022 |
url |
https://aaltodoc.aalto.fi/handle/123456789/117822 https://doi.org/10.1016/j.oceaneng.2022.111730 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
Ocean Engineering Volume 258 Lemstrom , I , Polojarvi , A , Puolakka , O & Tuhkuri , J 2022 , ' Load distributions in the ice-structure interaction process in shallow water ' , Ocean Engineering , vol. 258 , 111730 . https://doi.org/10.1016/j.oceaneng.2022.111730 0029-8018 1873-5258 PURE UUID: 6614c1e4-bcaf-4d66-9fa0-24690b68a982 PURE ITEMURL: https://research.aalto.fi/en/publications/6614c1e4-bcaf-4d66-9fa0-24690b68a982 PURE FILEURL: https://research.aalto.fi/files/92429738/1_s2.0_S0029801822010812_main.pdf https://aaltodoc.aalto.fi/handle/123456789/117822 URN:NBN:fi:aalto-202211236582 doi:10.1016/j.oceaneng.2022.111730 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1016/j.oceaneng.2022.111730 |
container_title |
Ocean Engineering |
container_volume |
258 |
container_start_page |
111730 |
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1766032011627069440 |