Author(s): S. Narita; S. Kishi
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Keywords: No Keywords
Abstract: Full-scale experiments and observations have proven that the existence of snow on ice generally causes greater resistance to ships navigating in ice. This increase of resistance is often attributed to the friction between the ship’s hull and the snow. Model tests of an icebreaker were conducted in level ice covered with a’model’ snow made by crushing fresh-water ice. The existence of snow caused a significant increase of resistance and a marked change in the failure pattern of the ice sheet, which in turn resulted in a more irregular motion of the model, compared with those in snow-free ice. Hull/snow friction tests were conducted using a ski coated samely as the model hull, which indicated that the pure hull/snow friction factor was almost the same as the hull/ice friction factor, and that the compaction of snow was probably also one of the causes for the increase of the resistance.
Year: 1988