Sandwich type acoustic window structure of ship dome

A technology of deflector and sound-transmitting window, which is applied in ship construction, ship parts, ships, etc., can solve the problems of poor flow noise performance, reduce vibration, improve stability, and reduce signal interference

Pending Publication Date: 2017-09-05
哈尔滨工程大学船舶装备科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of the poor flow noise reduction performance of the marine deflector in the prior art, the present invention proposes a sandwich type sound-permeable window structure for the marine reverse deflector, and the adopted technical scheme is as follows:

Method used

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  • Sandwich type acoustic window structure of ship dome

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Effect test

Embodiment 1

[0017] A sandwich sound-permeable window structure for a ship's windshield, the sandwich-type sound-permeable window structure for a ship's windshield includes an inner constraining surface layer 1, an outer constraining surface layer 3, and a core layer 2, and the core layer 2 is tightly Bonded between the inner constraining surface layer 1 and the outer constraining surface layer 3; the inner constraining surface layer 1 and the outer constraining surface layer 3 are both made of fiber-reinforced resin-based composite materials, and the core layer 2 is made of viscoelastic material become.

[0018] Wherein, the inner constraining surface layer 1 and the outer constraining surface layer 3 are made of carbon fiber reinforced composite material; the core layer 2 is made of polyurethane viscoelastic material. The thickness of the outer constraining surface layer 3 is 0.2mm; the thickness of the inner constraining surface layer 1 is 0.2mm, the thickness of the core layer 2 is 25m...

Embodiment 2

[0022] This embodiment is a further improvement on the inner constraining surface layer 1 and the outer constraining surface layer 3 described in Embodiment 1, specifically: the sandwich type sound-permeable window structure of the marine fairing in this embodiment The three-layer structure design is that both the inner constraining surface layer 1 and the outer constraining surface layer 3 are made of FRP, the core layer 2 is made of polyurethane viscoelastic material, and the installation positions and dimensions of other components are the same as those in Embodiment 1.

[0023] This design can effectively reduce the self-noise generated by the surface of the shroud due to turbulent pulsation excitation, and the self-noise can be reduced by up to 90%; it greatly reduces the signal interference of the flow noise to the sonar antenna, and improves the stability of the signal reception of the sonar antenna sex.

[0024] In addition, the sandwich-type sound-permeable window str...

Embodiment 3

[0026] This embodiment is a further improvement on the inner constraining surface layer 1 and the outer constraining surface layer 3 described in Embodiment 1, specifically: the sandwich type sound-permeable window structure of the marine fairing in this embodiment The three-layer structure design is that both the inner constraining surface layer 1 and the outer constraining surface layer 3 are made of titanium alloy, the core layer 2 is made of polyurethane viscoelastic material, and the installation positions and dimensions of other components are the same as those in Example 1.

[0027] This design can effectively reduce the self-noise generated by the surface of the shroud due to turbulent pulsation excitation, and the self-noise can be reduced by up to 92%; it greatly reduces the signal interference of the flow noise to the sonar antenna, and improves the stability of the signal reception of the sonar antenna sex.

[0028] In addition, the sandwich-type sound-transmitting...

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Abstract

The utility model relates to a sandwich type sound-permeable window structure form of a ship's wind deflector. The main body is a sandwich structure, including inner and outer constrained layers and a sandwich core. The constrained surface layer is made of fiber-reinforced resin-based composite material or titanium alloy, and the core layer is made of viscoelastic material. The constrained surface layer is closely bonded to the core layer. The invention comprehensively considers the requirements of the structure in terms of strength and acoustic characteristics. In addition to satisfying the structural strength, it also has good sound transmission performance, small insertion loss, large damping factor, and high specific strength, which reduces the noise generated under the excitation of surface turbulent pulsation. Self-noise, thereby reducing the signal interference of flow noise to the sonar antenna.

Description

technical field [0001] The invention relates to a sandwich-type sound-permeable window structure of a ship's wind deflector, and belongs to the technical field of ship's acoustics. Background technique [0002] The bottom of the bow of modern large and medium-sized ships is mostly equipped with a comprehensive bow detection sonar array. In order to avoid the impact of water flow on the sonar array and protect the array from the direct interference of "false sound", diversion is usually arranged outside the sonar array. cover. The bulbous bow shroud of a ship equipped with sonar is the detection window for underwater anti-submarine warfare. As the working compartment of the equipment, the acoustic window structure of the bulbous bow dome requires good acoustic performance, small beam distortion, good hydrodynamic performance and low self-noise. Therefore, the acoustic design of the material, line type and structure of the sonar dome should achieve good acoustic performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B27/40B32B27/08B32B15/095B63B17/00
CPCB32B27/12B32B15/095B32B27/08B32B27/40B32B2262/101B32B2262/106B32B2307/10B32B2605/12B63B17/00B63B2017/0045
Inventor 李平原慜王丽君
Owner 哈尔滨工程大学船舶装备科技有限公司
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