Імпедансні характеристики пласко-паралельного акустичного хвилеводу з акустично м`якими границями при збудженні його двохчастотним сигналом

Максим Олексеевич Коржик; Sergii Viktorovich Kurdiuk; Olexiy Volodymyrovych Korzhyk

doi:10.20535/2523-4455.2018.23.4.137528

Vol. 23 · Issue 4 · 2018 Aug 30, 2018 Acoustical devices and systems

Импедансные характеристики плоско-параллельного акустического волновода с акустически мягкими границами при возбуждении его двухчастотным сигналом

МК

Максим Олексеевич Коржик Corresponding Національний Технічний Університет України "Київський Політехнічний Інститут імені Ігоря Сікорського" Ukraine

Sergii Viktorovich Kurdiuk Інститут Військово-Морських Сил НУ "ОМА" Ukraine

Olexiy Volodymyrovych Korzhyk Національний Технічний Університет України "Київський Політехнічний Інститут імені Ігоря Сікорського" Ukraine

Pages65-73 PublishedAug 30, 2018

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VOL 23 · ISS 4 · 2018 View issue

Abstract

The impedance characteristics of a waveguide with combined boundaries are considered in the propagation of a wave packet by a two-frequency signal. A plane-parallel waveguide with acoustically mellow boundaries was modeled by a shallow sea with a bottom surface represented by an acoustically rigid boundary. The boundary between media "water-air" is an acoustically soft boundary also. As a result of solving the problem of determining the acoustic impedance along the horizontal and along the vertical section of the waveguide, the main analytical expressions, which described propagation process in such boundary condition. For the determination of task solution was used the superposition of average values of the oscillations velocity components and acoustic pressures. The problems of the formation in the waveguide average for the observation interval meanings of power flux densities and acoustic energy densities are considered. The aim of this work is to determine the specific acoustic impedances to normal waves propagating in a plane-parallel waveguide with mellow boundaries and their effect on the main energy characteristics of an acoustic field, which excited by a two-frequency source. Under conditions of dispersion, for the low-frequency region and the first mode of the waveguide, the dependences are calculated. In paper shown the features of the impedance characteristics and their influence on the distribution along the waveguide channel average for the observation interval meanings power flux densities and acoustic energy density. In the paper also shown the dependence the impedance of a waveguide along the horizontal axis on the coordinate and on frequency values of the original packet. Bibl.12, Fig. 4

Keywords

#the impedance #shallow sea #waveguide #two-frequency source #meanings power flux densities #acoustic energy density

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