Author(s): Mingchi Lu; W. M. Sackinger
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Keywords: No Keywords
Abstract: A theoretical study was made, using an analysis of dynamic impact and progressive penetration, for an ice island acting upon a rigid cylindrical structure. The maximum penetration of a structure into an impacting ice island, and hence the area of the contact, depends upon its initial kinetic energy and the rate at which this energy is dissipated during the impact process. As an example for an ice island of dimensions 3 km X 2.5 km X 20 m at a speed of 0.2 m/s, the maximum penetration distance was calculated to be 16.5m, in an elapsed time of 128 seconds. The maximum calculated global force was 266 MN. The effects of ice island velocities, and of the hydrodynamic added mass of the ice island, on the forces on the structure are discussed. This is a further theoretical analysis of an ice floe impact after Sanderson (1988), with a numerical method used in the calculations.
Year: 1992