Theory of the Ship and Construction Mechanics
DOI: http://www.dx.doi.org/10.24866/2227-6858/2020-3-4

Kozin V.

VICTOR KOZIN, Doctor of Engineering Sciences, Professor, Institute of Machine Science and Metallurgy, FEB RAS,
ORCID: https://orcid.org/0000-0002-2673-469X, ResearcherID: S-6053-2016, ScopusID: 8548383800, e-mail: kozinvictor@rambler.ru
Khabarovsk Federal Research Center FEB RAS
Komsomolsk-on-Amur, Russia

The increase of the ice-breaking ability
of flexural-gravitational waves as they approach the shore

Abstract: The paper considers the possibility of increasing the efficiency of the resonance method of ice cover destruction (RRL), i.e. by exciting resonant bending-gravitational waves (IGW) of an amphibious hovercraft (SVP) in solving such important economic problems as: clearance of ice complications in the form of congestion and blocking on rivers flowing from south to north; extension of navigation on inland waterways; early opening of ice reservoirs on the lower tail of hydroelectric power stations in order to increase their power generation, etc. through the use of appropriate maneuvering of vessels near the shore. Due to the complexity of the process of ice cover destruction due to the influence of the proximity of the coast on it, only general information on the destruction of ice from full-scale SVPs in the field and the results of studies carried out in an experimental pool on elastic films simulating ice cover are presented. As a result of research, deformation of the ice cover during the subsequent movement of vessels along the formed free edge, and hence the bending stresses in the ice, increased significantly. The paper presents the results of experimental studies of the dependence of the height of the IGW, excited in the ice cover by a moving load, when it comes ashore from the angle of inclination of the bottom of the pool. The recommendations on the use of the bottom angle to increase the efficiency of the destruction of the ice cover (increase the thickness of the destroyed ice) by the resonance method are also given.
Keywords: ice cover, flexural-gravitational waves, wave height, hovercraft, destruction, resonance method, bottom tilt, modeling.

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