A dynamic model for ice-induced vibration of structures

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Conference25th International Conference on Offshore Mechanics and Arctic Engineering, 4-9 June 2006, Hamburg, Germany
Subjectice-structure interaction; dynamic modeling; frequency lock-in; resonance; stochastic vibration
AbstractA dynamic model for the ice-induced vibration (IIV) of structures is developed in the present study. Ice properties have been taken into account, such as the discrete failure, the dependence of the crushing strength on the ice velocity and the randomness of the ice failure. The most important prediction of the model is to capture the resonant frequency lock-in, which is analogue to that in the vortex-induced vibration (VIV). Based on the model, the mechanism of resonant IIV is discussed. It is found that the dependence of the ice crushing strength on the ice velocity plays an important role in the resonant frequency lock-in of IIV. In addition, an intermittent stochastic resonant vibration is simulated from the model. These predictions are supported by the laboratory and field observations reported. The present model is more productive than the previous models of IIV.
Publication date
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedYes
NRC number6364
NPARC number8894885
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Record identifiere7a98f8d-67dd-42b5-b589-3104d8234c52
Record created2009-04-22
Record modified2016-05-09
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