Physical mechanism of ice/structure interaction
ABSTRACT To obtain the effect of velocity and structural natural frequency (structural stiffness) on ice failure, an extended dynamic Van der Pol-based single degree-of-freedom ice/structure interaction model is developed. Three basic modes of response were reproduced: intermittent crushing, frequen...
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Language: | English |
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/jog.2018.5 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000059 |
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crcambridgeupr:10.1017/jog.2018.5 2024-03-03T08:46:02+00:00 Physical mechanism of ice/structure interaction JI, XU OTERKUS, ERKAN 2018 http://dx.doi.org/10.1017/jog.2018.5 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000059 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 64, issue 244, page 197-207 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2018 crcambridgeupr https://doi.org/10.1017/jog.2018.5 2024-02-08T08:42:01Z ABSTRACT To obtain the effect of velocity and structural natural frequency (structural stiffness) on ice failure, an extended dynamic Van der Pol-based single degree-of-freedom ice/structure interaction model is developed. Three basic modes of response were reproduced: intermittent crushing, frequency lock-in and continuous crushing. Further analysis on the physical mechanism of ice/structure interaction is presented on the basis of feedback mechanism and energy mechanism, respectively. Internal effect and external effect from ice and structure were both explained in the feedback branch. Based on reproduced results, energy exchanges at different configurations are computed from the energy conservation using the first law of thermodynamics. A general conclusion on the predominant type of vibration when the ice velocity increases during the interaction process is forced, self-excited and forced in each of the three modes of responses. Ice force variations also show that there is more impulse energy during the lock-in range. Moreover, ice-induced vibration demonstrates an analogy of friction-induced self-excited vibration. Finally, the similarity between strain-stress curve and Stribeck curve shows that static and kinetic friction force variations are attributed to ice force characteristic, and can be used to explain the lower effective pressure magnitude during continuous crushing than the peak pressure during intermittent crushing. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 64 244 197 207 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes JI, XU OTERKUS, ERKAN Physical mechanism of ice/structure interaction |
topic_facet |
Earth-Surface Processes |
description |
ABSTRACT To obtain the effect of velocity and structural natural frequency (structural stiffness) on ice failure, an extended dynamic Van der Pol-based single degree-of-freedom ice/structure interaction model is developed. Three basic modes of response were reproduced: intermittent crushing, frequency lock-in and continuous crushing. Further analysis on the physical mechanism of ice/structure interaction is presented on the basis of feedback mechanism and energy mechanism, respectively. Internal effect and external effect from ice and structure were both explained in the feedback branch. Based on reproduced results, energy exchanges at different configurations are computed from the energy conservation using the first law of thermodynamics. A general conclusion on the predominant type of vibration when the ice velocity increases during the interaction process is forced, self-excited and forced in each of the three modes of responses. Ice force variations also show that there is more impulse energy during the lock-in range. Moreover, ice-induced vibration demonstrates an analogy of friction-induced self-excited vibration. Finally, the similarity between strain-stress curve and Stribeck curve shows that static and kinetic friction force variations are attributed to ice force characteristic, and can be used to explain the lower effective pressure magnitude during continuous crushing than the peak pressure during intermittent crushing. |
format |
Article in Journal/Newspaper |
author |
JI, XU OTERKUS, ERKAN |
author_facet |
JI, XU OTERKUS, ERKAN |
author_sort |
JI, XU |
title |
Physical mechanism of ice/structure interaction |
title_short |
Physical mechanism of ice/structure interaction |
title_full |
Physical mechanism of ice/structure interaction |
title_fullStr |
Physical mechanism of ice/structure interaction |
title_full_unstemmed |
Physical mechanism of ice/structure interaction |
title_sort |
physical mechanism of ice/structure interaction |
publisher |
Cambridge University Press (CUP) |
publishDate |
2018 |
url |
http://dx.doi.org/10.1017/jog.2018.5 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000059 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 64, issue 244, page 197-207 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2018.5 |
container_title |
Journal of Glaciology |
container_volume |
64 |
container_issue |
244 |
container_start_page |
197 |
op_container_end_page |
207 |
_version_ |
1792501837480329216 |