METHOD FOR DETERMINING DEFORMATION AND STRENGTH RESPONSE OF FLAT ICE COVER TO BEND IN NATURAL CONDITIONS Russian patent published in 2017 - IPC G01N3/20 G01V1/00 

FIELD: measurement equipment.

SUBSTANCE: method involves the use of the vessel (icebreaker), which has a short stem force action on the ice field up to its destruction or creation of a ship in open water free wave aimed at the edge of the ice field. At the same time on the ice cover are installed in a line along the ship's motion on several pickets (points) seismometer, deform meter, inclinometer and frozen into a voltage sensor, and the bow is set accelerometer to determine when breaking the ice. Such ice pickets organize from one to three or more. Distance between pickets selected depending on the thickness of the ice and the nature of the impact on the ice field. In the case of force action on the edge of the vessel, stem floes carry one of two modes: slow continuous movement through the installation of the sensors on the vessel or solitary pickets breaking the ice with stops bending movement of the vessel between the effects. In the bow of the vessel the accelerometer that records the time of breaking the ice is installed. In the case of a free wave is necessary that before the ice-field was a pure land on which the ship could get up to speed and to brake before the edge of the field, which will lead to the spread of the ice field in the flexural-gravity waves. As a result, the following parameters are determined: the time of breaking the ice at a bend, critical slopes of the ice field, the relative strains, and stresses in the surface layer of ice. In the formation of cracks in the ice in the vicinity of any picket can receive ice breaking stress plate.

EFFECT: improved accuracy of the data.

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