METHOD OF BREAKING ICE COVER Russian patent published in 1999 - IPC

FIELD: shipbuilding; submerged vessels breaking ice covers by resonance method. SUBSTANCE: during motion of submerged vessel, outside water is additionally sucked inside by means of pump located inside vessel in water flow passage. Water intake part of passage is located in upper portion of ship's skin where through of flexural gravitational wave is located. Outlet of passage is located in aft section of vessel. EFFECT: enhanced efficiency of breaking ice cover due to increased height of flexural gravitational waves. 2 cl, 1 dwg