METHOD OF BREAKING ICE COVER Russian patent published in 2004 - IPC

FIELD: shipbuilding; submarine ships running under ice and breaking ice by resonance method during surfacing in close pack-ice. SUBSTANCE: proposed method includes excitation of resonance flexural gravitational waves in ice during motion of submarine ship under ice at resonance sped and performing repeated passages. Ship runs close to lower surface of ice and her speed during repeated passages shall be equal to hump speed, i.e. it shall correspond to maximum wave resistance. After each passage, safety of surfacing is estimated by determination of degree of breaking ice judged from degree of turbulence of liquid in boundary layer of ship's skin measured by means of sensors. EFFECT: enhanced safety of surfacing. 1 dwg