Author(s): K. R. Croasdale; N. F. B. Allyn; R. W. Marcellus
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Keywords: No Keywords
Abstract: The ice rubble which forms around wide structures or in ships tracks is of significant interest to ice engineers concerned with the design and operation of Arctic structures and navigation in confined waterways. First, the ice rubble itself affects ice failure modes and therefore ice loads. Second, grounded ice rubble can protect a structure against ice loads. Third, ice rubble can interfere with ship access. Fourth, stable ice rubble can serve as a storage area and can be thickened using flooding or spraying to form a construction/drilling platform. The properties of the ice rubble are important in quantifying the above issues. Of prime importance is how the ice rubble responds thermally after formation. The depth of refreezing of the ice rubble and the continuity of the refrozen layers are of interest. This paper describes a comprehensive computer model which can be used to predict the refreezing of ice rubble as a function of important relevant parameters including; air temperature, wind speed, radiation, ice temperature, rubble porosity, rubble height, snow cover, salinities etc. The mode] also predicts mechanical properties of the refrozen layer. Results from using the model are compared to fullscale observations. The importance of the various input parameters is discussed.
Year: 1990