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Excitation of low-mode-number acoustic signals by a vertical array in shallow sea in the presence of underwater flows

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Abstract

We study the features of formation of low-mode-number acoustic signals in shallow sea by a vertical array matched to the hydroacoustic waveguide structure in the presence of drowned flows that cause the array bending and deflection from the vertical. For other given parameters of the waveguide and the flows, the efficiency of excitation of the low-mode-number signals is shown to be determined by the array position and length. It is demonstrated that the flow-induced array bending and deflection from the vertical introduces inhomogeneity in the structure of the excited low-mode-number fields. In particular, spatial modulation of the radiated signals can appear in the horizontal plane. Possibilities of reduction of the field inhomogeneity are discussed.

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Authors and Affiliations

  1. Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia

    B. V. Kerzhakov, V. V. Kulinich, A. G. Koshkin & A. I. Khil’ko

Authors
  1. B. V. Kerzhakov
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  2. V. V. Kulinich
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  3. A. G. Koshkin
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  4. A. I. Khil’ko
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 49, No. 11, pp. 925–941, November 2006.

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Kerzhakov, B.V., Kulinich, V.V., Koshkin, A.G. et al. Excitation of low-mode-number acoustic signals by a vertical array in shallow sea in the presence of underwater flows. Radiophys Quantum Electron 49, 835–850 (2006). https://doi.org/10.1007/s11141-006-0119-9

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  • DOI: https://doi.org/10.1007/s11141-006-0119-9

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