Hydrodynamic Loads Acting on the Submerged Body at the Motion Beneath an Ice-Cover

I. V. Sturova

M. A. Lavrent'ev Institute of Hydrodynamics, Novosibirsk

Abstract: A submerged sphere advancing at constant forward speed in deep water with an ice-cover is analyzed by linear potential theory, with the ice-cover being modeled as an elastic plate of small thickness. The problems of radiation (surge, sway and heave) of the flexural-gravity waves by a submerged sphere are investigated. Method of multipole expansions is used. Numerical results are obtained for the radiation load: added-mass and damping coefficients. When the flexural rigidity and the density of the ice-cover are taken to be zero, the numerical results for the hydrodynamic load for water with a free surface are recovered.

Keywords: radiation problem at forward speed, ice-cover, submerged sphere, added mass, damping coefficient.

UDC: 532.59

Received: 15.07.2012