Abstract
<jats:p>The characteristics of the scattering of a stationary sound signal from a set of concentrated sources are obtained, simulating the pulsations of the "volumetric" component of the sound of rotation of the propulsion model of an uninhabited underwater vehicle (UUV) in the nozzle. An algorithm is used for the numerical solution of the integral equation for the displacement vector of an elastic shell of a non-analytical shape approximating the surface of the casing and Kirchhoff's integral equation for diffuse pressure. The external surfaces of the UUV housings and nozzles are modeled by a set of isotropic gas-filled shells (finite cylindrical, hemispherical and conical). The total sound field at the observation point takes into account the contribution from the radiation of point sources directly into the liquid medium and through the wall of the nozzle, as well as the sound field of point sources scattered on the body of the UUV model. The considered approach can also be extended to account for the "power" component (dipole radiators) by introducing additional sources of false signs. A comparative computational evaluation of the effectiveness of several variants of the propulsion nozzle of the UUV model for reducing the levels of the sound signal scattered by the body has been performed. The features of scattering characteristics related to the corresponding ranges of the wave dimensions of the model and the viewing angles are noted.</jats:p>