The nonstationary motion of amphibian air-cushion vehicles (ACV) over water covered with continuous ice is considered. The ice sheet is simulated by an elastic ice plate. An analysis is made of the effect of the vehicle length, velocity regimes, the depth of water reservoir, and the ice characteristics on the wave resistance of the ACV.


Working out of coastal and shelf areas under freezing seashore sea conditions is connected with the problem of making shallow water constructions free from ice. The amphibian air-cushion vehicles (ACV) are the most suitable to solve the problem. Their great maneuverability, superpassibility and independence on the depth of the basin let us apply them under the conditions where big icebreakers are useless. It is known that the bending gravitational wave occurring during the ACV motion reaches its maximum amplitude at resonance velocities of the vehicle motion and under certain conditions destroys the ice cover. The book Squire et al (1996) gives a succinct, contemporary account of research on the topic of moving loads on floating ice sheets and contains a profound monography. However, all the early theoretical researches were limited by stationary putting the task or by impulse increase of the vehicle velocity from zero to some constant value. The purpose of the work is to consider wave resistance of ACV during the motion along continuous ice cover at velocity regimes nearing the real ones. To give the vehicle velocity depending on time with the function of hyperbolic tangent makes it possible to simulate acceleration and deceleration of the vehicle as well as its stationary motion.


The hydrodynamic problem of an amphibian air-cushion vehicle (ACV) moving over an ice field is simulated by a system of surface pressures (Benua, 1970) moving on a floating elastic ice plate (Kheisin, 1967).

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