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Acoustical characteristic predictions of a multi-layer system of a submerged vehicle hull mounted sonar simplified to an infinite planar model

  • 발행 : 2012.06.30

초록

Hull Mounted Sonar (HMS) is a long range submerged vehicle's hull-mounted passive sonar system which detects low-frequency noise caused by machineries of enemy ships or submerged vehicles. The HMS needs a sound absorption /insulation multi-layer structure to shut out the self-noise from own machineries and to amplify signals from outside. Therefore, acoustic analysis of the multi-layer system should be performed when the HMS is designed. This paper simplified the HMS multi-layer system to be an infinite planar multi-layer model. Also, main excitations that influence the HMS were classified into mechanical, plane wave and turbulent flow excitation, and the investigations for each excitation were performed for various models. Stiffened multi-layer analysis for mechanical excitation and general multi-layer analysis for turbulent flow excitation were developed. The infinite planar multi-layer analysis was expected to be more useful for preliminary design stage of HMS system than the infinite cylindrical model because of short analysis time and easiness of parameter study.

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참고문헌

  1. Corcos, G.M., 1964. The structure of the turbulent pressure field in boundary layer flows. Journal of Fluid Mechanics, 18(3), pp.353-378. https://doi.org/10.1017/S002211206400026X
  2. Efimtsov, B.M., 1982. Characteristics of the field of turbulent wall pressure fluctuations at large Reynolds numbers. Soviet Physics-Acoustics, 28(4), pp.289-292.
  3. Evseev, V.N., 1973. Sound radiation from an infinite plate with periodic inhomogeneities. Soviet Physics-Acoustics, 19(3), pp.226-229.
  4. Graham, W.R., 1997. A comparison of models for the wavenumber-frequency spectrum of turbulent boundary layer pressures. Journal of Sound and Vibration, 206(4), pp.541-565. https://doi.org/10.1006/jsvi.1997.1114
  5. Kang, M.W., Seo, Y.S., Shin, K.K. and Jeon, J.J., 2011. Acoustic performance study of FRP acoustic window. Proceeding of the Korean Society for Noise and Vibration Engineering Annual Spring Conference. Jeongseon, Korea, pp.285-290.
  6. Ko, S.H. and Schloemer, H.H., 1989. Calculations of turbulent boundary layer pressure fluctuations transmitted into a viscoelastic layer. Journal of the Acoustical Society of America, 85(4), pp.1469-1477. https://doi.org/10.1121/1.397347
  7. Ko, S.H. and Nuttall, A.H., 1991. Analytical evaluation of flush-mounted hydrophone array response to the Corcos turbulent wall pressure spectrum. Journal of the Acoustical Society of America, 90(1), pp.579-588. https://doi.org/10.1121/1.401232
  8. Ko, S.H., 1994. The flush-mounted hydrophone array response to a modified Corcos turbulent wall pressure spectrum (analytical approach). Journal of the Acoustical Society of America, 96(2), pp.1198-1201. https://doi.org/10.1121/1.410331
  9. Ko, S.H., Pyo, S.W. and Seong, W.J., 2001. Structure-Borne and Flow Noise Reductions: Methematical Modeling. Seoul : Seoul National University Press.
  10. Mace, B.R., 1980. Sound radiation from a plate reinforced by two sets of parallel stiffeners. Journal of Sound and Vibration, 71(3), pp.435-441. https://doi.org/10.1016/0022-460X(80)90425-3
  11. Skelton, E.A. and James, J.H., 1997. Theoretical Acoustics of Underwater Structures. London : Imperial College Press.