Physical mechanism of ice/structure interaction
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-i...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Cambridge University Press
2018-04-01
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| Series: | Journal of Glaciology |
| Subjects: | |
| Online Access: | https://www.cambridge.org/core/product/identifier/S0022143018000059/type/journal_article |
| _version_ | 1811155861885681664 |
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| author | XU JI ERKAN OTERKUS |
| author_facet | XU JI ERKAN OTERKUS |
| author_sort | XU JI |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-10T04:40:43Z |
| format | Article |
| id | doaj.art-6211ddaf881541049f09bcb25010cbf9 |
| institution | Directory Open Access Journal |
| issn | 0022-1430 1727-5652 |
| language | English |
| last_indexed | 2024-04-10T04:40:43Z |
| publishDate | 2018-04-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Journal of Glaciology |
| spelling | doaj.art-6211ddaf881541049f09bcb25010cbf92023-03-09T12:40:32ZengCambridge University PressJournal of Glaciology0022-14301727-56522018-04-016419720710.1017/jog.2018.5Physical mechanism of ice/structure interactionXU JI0ERKAN OTERKUS1Department of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, 100 Montrose Street Glasgow G4 0LZ, UKDepartment of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, 100 Montrose Street Glasgow G4 0LZ, UKTo 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.https://www.cambridge.org/core/product/identifier/S0022143018000059/type/journal_articleenergy balanceice dynamicsice physics |
| spellingShingle | XU JI ERKAN OTERKUS Physical mechanism of ice/structure interaction Journal of Glaciology energy balance ice dynamics ice physics |
| title | 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_short | Physical mechanism of ice/structure interaction |
| title_sort | physical mechanism of ice structure interaction |
| topic | energy balance ice dynamics ice physics |
| url | https://www.cambridge.org/core/product/identifier/S0022143018000059/type/journal_article |
| work_keys_str_mv | AT xuji physicalmechanismoficestructureinteraction AT erkanoterkus physicalmechanismoficestructureinteraction |