A dynamic model for ice-induced vibration of structures

• Published in: Volume 2: Ocean Engineering and Polar and Arctic Sciences and Technology
• Main Authors: 黄国君, Liu PF
• Format: Other/Unknown Material
• Language: English
• Published: 2006
• Subjects: Dynamic Modeling; Frequency Lock-in; Ice-structure Interaction; Stochastic Vibration; Arctic
• Online Access: http://dspace.imech.ac.cn/handle/311007/60326; https://doi.org/10.1115/OMAE2006-92077

A 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. Copyright © 2006 by ASME.