Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF0 Cites 3 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sandwich type acoustic window structure of ship dome

Examples

Experimental program
Comparison scheme
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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a sandwich type acoustic window structure form of a ship dome. A main body is of a sandwich structure and comprises an inner constraint surface layer, an outer constraint surface layer and a sandwich, wherein the material of the constraint surface layers is a fiber enhanced resin-based composite material or a titanium alloy; the material of a core layer is a viscoelastic material; the constraint surface layers are tightly stuck with the core layer. According to the sandwich type acoustic transmission window structure form provided by the invention, requirements of the structure in the aspects of strength and acoustic characteristics are comprehensively considered; after the structure strength is met, the sandwich type acoustic window structure form has good sound transmission performance, small insertion loss, great damping factors and high specific strength; self noise generated under the excitation of surface turbulent fluctuation are reduced so that signal interference, caused by flow noises, on a sonar antenna is reduced.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B27/40B32B27/08B32B15/095B63B17/00
CPCB63B17/00B32B15/095B32B27/08B32B27/12B32B27/40B32B2605/12B32B2262/101B32B2262/106B32B2307/10B63B2017/0045
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com