JIN S N, JIN G Y, YE T G, et al. Predication and comprehensive control of self-noise of ship's sonar platform[J]. Chinese Journal of Ship Research, 2022, 18(Supp 1): 1–9. doi: 10.19693/j.issn.1673-3185.02466
Citation: JIN S N, JIN G Y, YE T G, et al. Predication and comprehensive control of self-noise of ship's sonar platform[J]. Chinese Journal of Ship Research, 2022, 18(Supp 1): 1–9. doi: 10.19693/j.issn.1673-3185.02466

Predication and comprehensive control of self-noise of ship's sonar platform

  •   Objectives  This paper aims to solve the problem of the prediction and control of the bow sonar self-noise.
      Methods  The self-noise simulation model of the ship's sonar platform based on the entire ship was established using the statistical energy analysis (SEA). Based on the prediction results, the noise reduction effect of laying sound absorption wedge, polyurethane, and setting a concave-shaped acoustic baffle on the self-noise was studied. The effects of sound transmission window on flow-induced noise are discussed from two aspects, i.e., material and structure.
      Results  The results show that the bow sonar self-noise can be reduced to a certain extent by laying sound absorption wedge on the non-transparent interface, and the mechanical noise of bow sonar can be effectively reduced by laying polyurethane material, while the noise reduction effect of flow induced noise and propeller noise is relatively small. The mechanical noise and propeller noise in bow sonar can be effectively controlled by setting concave angle acoustic baffle. Compared with the single-layer glass window with the same thickness, the sandwich titanium alloy window can better suppress the flow induced noise in the bow sonar platform.
      Conclusions  The simulation results can provide theoretical basis and data support for noise reduction design of bow sonar platform.
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