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Information × Registration Number 0217U002933, 0114U000070 , R & D reports Title Sound generation mechanism studing and methods of its analysis developing for fluid and deformed bodies interaction. popup.stage_title Head Grinchenko Victor Timopheevich, Registration Date 26-12-2017 Organization The Institute of Hydromechanics of the National Academy of Sciences of Ukraine popup.description2 The two-dimensional model problem concerning the propagation of a harmonic wave in an acoustoelastic regular structure formed by two parallel infinite elastic rod guides periodically reinforced by flexible beam-partitions is considered, a dispersion equation is derived and permitted values of propagation velocity are determined. It is found that the dispersion equation can be written in closed form only for a simplified version of the structure without acoustic filling, while for complete formulation of the problem it is given through a determinant of an infinite algebraic system. The strong dispersion of waves in the investigated structure is shown, with rapid decrease of the phase velocity when approaching the bending resonances of partitions. On the basis of obtained data, the conclusion was made that at localized excitation of a microstructured acoustoelastic medium, in addition to the bulk wave corresponding to spatially averaged mechanical characteristics, a specific equivoluminal wave for which the acoustic filling behaves as an attached mass may exist within the frequency band below the typical value of the first bending resonance of the chamber wall. Product Description popup.authors І. В. Вовк А.А.Макаренко В.Г.Басовський В.Н.Олійник В.Т.Грінченко popup.nrat_date 2020-04-02 Close