The paper deals with the theoretical investigation of the straight unsteady motion of a slender axisymmetric body submerged into the liquid below the floating ice elastic plate. The formulae describing the plate deflection with the help of integral and asymptotic methods are numerically analyzed with respect to velocity and submergence depth and linear dimensions of the body, basin depth, and ice plate thickness. The experimental model tests on a submarine (scale of 1:500) moving under a polymeric plate 0.002 m thickness in the test basin measuring L?B?H = 5.2?1.8x0.8 m are carried out. Good agreement between theoretical and experimental results regarding the values of the plate maximum deflections for various submergencedepths, water depth and velocities of the moving body is obtained.
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