METHOD FOR DETERMINING THE STRESS-STRAIN STATE OF THE ICE FIELD DURING MOVEMENT OF AN ICEBREAKER Russian patent published in 2023 - IPC B63B35/08 B63B79/15 G01L1/00 

FIELD: ice science; ice engineering.

SUBSTANCE: method is proposed for determining the stress-strain state of an ice field during movement of an icebreaker, which is characterized by the placement of video surveillance cameras and sensors on the icebreaker and on the ice cover. Accelerometers are installed in the stern and bow parts of the vessel to fix the ice break during the movement of the icebreaker. In the bow of the ship, on the left and right sides, video cameras are fixed in the position of sighting of the sea surface in the stem area, providing real-time video recording of the forms and nature of ice destruction by the icebreaker stem; a video camera is installed on the bridge of the vessel, aimed at recording the formation of a crack in front of the icebreaker stem during its movement; a video camera is installed in the stern of the vessel to record the width of the channel behind the icebreaker; on the bridge there is a second video camera in the position of sighting on the sea surface of the upturned ice floes in the area of the ship's side to determine the thickness of the ice. At the same time, three posts are deployed on the ice perpendicular to the course of the vessel's movement on both sides, each of which has a three-component seismometer, a two-component tiltmeter, three ring deformometers, the racks of which are frozen into the ice in such a way that the sensitivity axes are located at angles of 120° relative to each other, three flat stress sensors are also frozen into the ice cover at an angle of 120° relative to each other. Transmission of the analog signal from the sensors is converted into digital format and transmitted via radio in real time to the drive and the operator's monitor located on the vessel.

EFFECT: expanding functionality and completeness of determining the stress-strain state of the ice field up to destruction during the movement of the icebreaker.

2 cl, 1 dwg