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RESEARCH PAPERS

The Deflection of an Ice Sheet by a Submerged Gas Source

[+] Author and Article Information
D. R. Topham

Frozen Sea Research Group, Ocean and Aquatic Science, Department of the Environment, Victoria, B. C. V9A 4T5, Canada

J. Appl. Mech 44(2), 279-284 (Jun 01, 1977) (6 pages) doi:10.1115/1.3424038 History: Received September 01, 1976; Revised November 01, 1976; Online July 12, 2010

Abstract

The deflection of an infinite ice sheet by a submerged gas source, as would result from an undersea gas or oil well blowout is analysed utilizing an elastic thin plate model. The results show that fracture may occur either at the bubble center or just beyond the bubble edge, depending upon the bubble depth, the ice thickness, and the material properties assumed for the ice sheet. For ice one meter in thickness and a trapped gas depth greater than 100 mm, fracture at the bubble edge is probable. The critical bubble radius for failure varies rapidly with ice thickness, bubble depth, and the ice properties, which in view of the variability of the latter, makes the prediction of actual bubble radii to cause failure subject to a large degree of uncertainty.

Copyright © 1977 by ASME
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