Author(s): S. A. Vershinin; P. A. Truskov; K. V. Kouzmitchev
Linked Author(s):
Keywords: No Keywords
Abstract: A physical model of a first-year pressure ice ridge (hummock) interacting with the seabed in drift is derived with the purpose to tackle the problem of pipeline burial depth profile offshore Sakhalin Island. This paper improves the existent computational models by a more substantial description of the ice ridge keel behavior as it penetrates into bottom soil. The hummock is modeled by a loose-cohesive body with three degrees of freedom, which is forced by inertia and ice floe bearing to penetrate into bottom soil − also modeled as a loose medium. The process of hummock penetration into the seabed and disintegration of both media is described by equations of motion of solids and a theory of limit equilibrium of solidplastic bodies. Both sets of equations are adjusted for the friction of ice over soil to justifiably estimate the quantitative parameters of seabed gouging by ice pressure ridges as a function of sea depth, bottom slope and relevant geometrical and physical parameters of interacting media.
Year: 2004