V.N.Oliynik Wave propagation in the system of two parallel rods periodically supported by rigid transverse barriers and connected with an acoustic medium |
Acoustic bulletin, Vol. 11 ¹ 1, (2008) |
| The paper deals with considering the possibility of harmonic wave propagation in the system of two synchronically moving ideal elastic rods periodically supported by rigid transverse barriers. The volumes bounded by the rods and adjacent barriers are filled with a non-dissipative acoustic medium. With use of the Floquet method, the corresponding dispersion equation has been obtained and its roots have been analyzed. For some particular cases, wave propagation bands are specified. For all audible frequency range, it is shown that phase velocity of the obtained wave does not disperse and corresponds to the effective propagation velocity of the longitudinal wave in heterogeneous medium. |
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KEY WORDS: periodic elasto-acoustic structure, the Floquet method, harmonic wave |
| TEXT LANGUAGE: Ukrainian |