The problem of viscoelastic response of a floating ice plate to a moving air cushion vehicle (ACV) is considered. ACV is simulated by a specified system of surface pressures. The ice cover is simulated by a floating ice plate representing a combined four parametric model of a viscoelastic body. The model under discussion comprises two elastic and two viscous parts, which is serially connected Maxwell and Voigt units. The problem is solved analytically by integral transformation. The result obtained is compared to the experimental data. The spheres of application of various rheological models of the viscoelastic body are offered to solve different problems connected with the motion of loads on the floating ice plate.
Working out of coastal and shelf areas under freezing sea conditions is combined 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 from the basin depth make it possible to apply them under the conditions where big icebreakers are useless. It is known that the flexural gravitational wave occurring during the ACV motion reaches its maximum amplitude at resonance vehicle velocities and under certain conditions it breaks the ice cover. At solving the problem of a load motion on a floating ice plate the ice is usually modelled either by an elastic plate (Milinazzo et al, 1995), or by viscoelastic plate with deformation memory function (Hosking et al, 1988; Squire et al, 1996) or viscoelastic Kelvin-Voigt model (Kheisin, 1967; Kozin, Pogorelova, 2003). Kozin, Pogorelova (2006a) used Kelvin-Voigt model to find effect of a shock pulse loading on a float ice plate. The effects of unsteady motion were considered in Wang et al (2004), and Kozin, Pogorelova (2006b, 2007).
