Search academic texts

Information × Registration Number 0223U004689, 0120U105260 , R & D reports Title Diffraction processes and acoustic radiation forces in the bounded hydroelastic systems popup.stage_title Head Kubenko Veniamin D., Доктор фізико-математичних наук Registration Date 29-11-2023 Organization Institute of Mechanics. S.P. Tymoshenko of the National Academy of Sciences of Ukraine popup.description2  Objects of research – an infinite or semi-infinite cylindrical cavity filled with a compressible liquid containing an immersed single or system of solid, liquid or en-capsulated spherical particles under the action of stationary waves. The purpose of research – the formulation of relevant boundary value prob-lems, the development of approaches to solving and, based on them, the determina-tion of the characteristics of hydrodynamic fields and radiation forces in a cavity-filling compressible liquid with a system of inclusions. Research methods – analytical. Boundary problems of the theory of hydroacoustic interaction for a system of bodies in a cavity with a liquid are formulated. Based on the method of separation of variables, a method was developed that reduces the problem to the solving of an infinite system of algebraic equations. Computer programs were created and the parameters of the processes of multiple scattering of operating waves with inclusions were calculated. The features of the diffraction processes due to the axial limitation of the cavity have been established. The influence of the elastic compliance of the cavity wall was analyzed. The hydrodynamic pressure and velocity in the vicinity of a single inclusion and a system of inclusions in the cavity and in space were calculated, depending on the frequency of the active load, geometrical and physical-mechanical parameters of the system. Anomalous frequencies have been determined, when excited, the pressure in the cavity around the body increases significantly. The radiation force acting on the body and system of bodies was calculated as a function of the frequency of the operating wave. The peculiarities of hydroelastic interaction and diffraction processes for solid, liquid and particles encapsulated in a thin elastic shell are analyzed. CYLINDRICAL CAVITY WITH LIQUID, SYSTEM OF INCLUSIONS, ACOUSTIC INTERACTION, HYDRODYNAMIC FIELDS, RADIATION FORCES Product Description popup.authors Zhuk Yaroslav O. Klimchuk Taras V. Liskin Viacheslav O. Ostos Olexandr H Yanchevsʹkyy Igor V. popup.nrat_date 2023-11-29 Close