For arctic deepwater applications the use of a downward-breaking, conical-shaped hull may be required to reduce ice loads. The paper describes a test program ExxonMobil Upstream Research Company carried out in 2009 to study loads from multi-year ice on downward breaking cone structures. Tests were performed on four different cone models, covering a range of cone angles, model scales, drafts and ice drift speeds. The paper discusses observed ice failure mechanisms, the effect of draft and model scale on test results and the repeatability of ice load measurements under lab controlled conditions.

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