METHOD TO BREAK ICE COVER AND SEMI-SUBMERSIBLE ICEBREAKER SHIP Russian patent published in 2014 - IPC B63B35/12 B63B35/08 

FIELD: transportation.

SUBSTANCE: method is proposed to break ice cover, in which a pushing buoyant force is developed during motion of a semi-submersible ship, which presses at the lower surface of ice in vertical direction, and ice is broken with a ram brought under it with an ice-breaking rib connected to the ship body. The vertical pushing force is developed by all positive buoyancy of the semi-submersible ship and lifting force of its horizontal hydrodynamic rudders, at the same time the ram acts at ice in horizontal direction both by its inclined breaking rib and its entire surface. Also a semi-submersible icebreaking ship is proposed.

EFFECT: increased efficiency of ice cover breaking and icebreaking capability for transportation of loads.

8 cl, 9 dwg