FIELD: shipbuilding; submarine vessels breaking ice cover by resonance flexural gravitational waves. SUBSTANCE: enhanced efficiency of method is obtained through increase of tension stresses in ice cover at constant parameters of flexural gravitational waves by creating thermal shock. Thermal shock is created by delivery of supercooled liquid under ice to point of forming first crest of wave behinds hull. EFFECT: enhanced efficiency of ice breaking. 2 cl, 1 dwg
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