Physical mechanism of ice-structure interaction

Research output: Contribution to journalArticle

3 Citations (Scopus)
22 Downloads (Pure)

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 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 three modes of responses. Ice force variations also shows that there is more impulse energy during the lock-in range. Moreover, ice-induced vibration (IIV) 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.
Original languageEnglish
Pages (from-to)197-207
Number of pages11
JournalJournal of Glaciology
Volume64
Issue number244
Early online date28 Feb 2018
DOIs
Publication statusPublished - 30 Apr 2018

Fingerprint

ice-structure interaction
Ice
crushing
ice
Crushing
vibration
friction
energy
feedback mechanism
energy conservation
Friction
Feedback
stiffness
Degrees of freedom (mechanics)
Stress-strain curves
thermodynamics
Natural frequencies
kinetics
Energy conservation
Stiffness

Keywords

  • physical mechanisms
  • ice-structure interactions
  • ice-induced vibrations
  • Van der Pol equation

Cite this

@article{b70ede76a9a44a7c8af7b3e791155d0a,
title = "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, frequency lock-in and continuous crushing. Further analysis on 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 three modes of responses. Ice force variations also shows that there is more impulse energy during the lock-in range. Moreover, ice-induced vibration (IIV) 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.",
keywords = "physical mechanisms, ice-structure interactions, ice-induced vibrations, Van der Pol equation",
author = "Xu Ji and Erkan Oterkus",
year = "2018",
month = "4",
day = "30",
doi = "10.1017/jog.2018.5",
language = "English",
volume = "64",
pages = "197--207",
journal = "Journal of Glaciology",
issn = "0022-1430",
number = "244",

}

Physical mechanism of ice-structure interaction. / Ji, Xu; Oterkus, Erkan.

In: Journal of Glaciology, Vol. 64, No. 244, 30.04.2018, p. 197-207.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Physical mechanism of ice-structure interaction

AU - Ji, Xu

AU - Oterkus, Erkan

PY - 2018/4/30

Y1 - 2018/4/30

N2 - 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 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 three modes of responses. Ice force variations also shows that there is more impulse energy during the lock-in range. Moreover, ice-induced vibration (IIV) 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.

AB - 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 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 three modes of responses. Ice force variations also shows that there is more impulse energy during the lock-in range. Moreover, ice-induced vibration (IIV) 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.

KW - physical mechanisms

KW - ice-structure interactions

KW - ice-induced vibrations

KW - Van der Pol equation

UR - https://www.cambridge.org/core/journals/journal-of-glaciology

U2 - 10.1017/jog.2018.5

DO - 10.1017/jog.2018.5

M3 - Article

VL - 64

SP - 197

EP - 207

JO - Journal of Glaciology

JF - Journal of Glaciology

SN - 0022-1430

IS - 244

ER -