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Information × Registration Number 0221U105921, 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 09-09-2021 Organization Institute of Mechanics. S.P. Tymoshenko of the National Academy of Sciences of Ukraine popup.description2 Object of research: structural elements modeled by a semi-infinite cavity filled with a compressible liquid or a narrow elastic tube, containing a solid spherical body (particle) under the action of dynamic loading. Aim of the research: creation of a computer program and on its basis calculation and analysis of features of diffraction fields and radiation forces in a semi-finite cavity with a particle. Analytical solution of the problem of determining the acoustic field potential in a narrow elastic tube containing a solid particle; reduction of the solution of the problem to an infinite system of algebraic equations. Research methods – analytical with using of a system of computer algebra to obtain specific numerical results, A method for determining hydrodynamic parameters (pressure, wave velocity, radiation force) as a function of the incident wave frequency and physical and mechanical parameters of the system has been developed. Features of wave interaction of a cavity and a spherical body are established. It is shown that the hydroelastic system has a spectrum of perturbation frequencies, upon excitation of which the hydrodynamic pressure in the cavity increases many times. This frequency spectrum differs from similar frequencies inherent in the infinite cavity. The acoustic radiation force at anomalous frequencies increases significantly in value and can change the direction of action. An analytical solution of the problem of acoustic wave propagation in a liquid-filled narrow elastic tube with a solid particle is obtained. Product Description popup.authors Zhuk Yaroslav Olexandrovych Klimchuk Taras V Liskin Viacheslav O Ostos Olexandr H Yanchevskyi Ihor V popup.nrat_date 2021-09-09 Close