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

FIELD: shipbuilding; submerged vessel breaking ice cover by resonance method. SUBSTANCE: during motion of submerged vessel, outside water is additionally sucked inside vessel and is discharged beyond vessel by means of pump located inside vessel in water flow passage. Water intake portion of passage is located in upper portion of ship's skin at area where trough of flexible gravitational wave is located. Outlet of passage is directed vertically upward in upper aft section of vessel where crest of flexible gravitational wave is located. EFFECT: enhanced efficiency of braking ice due to increased height of flexural gravitational waves. 2 cl, 1 dwg