Hydrodynamic characteristics of a wing in a stratified fluid near the bottom

The problem of the motion of a thin wing in a stratified fluid near the bottom is considered. A solution is found using the logarithmic dynamic potential. The dependence of the hydrodynamic force and moment on the input parameters, namely, the Strouhal and Froude numbers and the distance to the bottom, is studied. An important feature of the amplitudes of nonstationary loads on the wing is their nonmonotonic character in the case where the frequency of vibrations is lower than the Brunt–Väisälä frequency, which is explained by the interaction between the wing's vibrations and the internal waves reflected from the bottom.