Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Viscoelasticity composite sound insulating board

A sound insulation board and viscoelastic technology, applied in the field of multi-layer composite acoustic structures for underwater acoustics, can solve the problem that underwater acoustic materials cannot fully meet the requirements of use, and achieve low cost, reduced reflection echo, and simple molding process. Effect

Inactive Publication Date: 2015-12-02
GUIZHOU UNIV
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a viscoelastic composite sound insulation board to solve the technical defect that the underwater acoustic material in the prior art cannot fully meet the requirements of use, and has good sound absorption, anti-sound and sound insulation function, effectively reducing the occurrence of sound leakage

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
  • Viscoelasticity composite sound insulating board
  • Viscoelasticity composite sound insulating board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Below in conjunction with accompanying drawing and specific embodiment the invention is further introduced:

[0022] Such as figure 1 and figure 2 As shown, a viscoelastic composite sound insulation board includes a damping layer 1, a sound insulation layer 2 and a sound absorption layer 3 arranged in sequence, and one side of the damping layer 1 is attached to the shell surface of the underwater moving body , the damping layer 1 is made of isotropic polyurethane or polymer resin, the sound-insulating layer 2 is made of polyolefin elastomer or glass fiber, the sound-absorbing layer 3 is made of photosensitive resin, and the sound-absorbing layer 3 is provided with a closed cavity 4 inside. The damping layer has a thickness of 8 mm to 20 mm, the sound insulation layer has a thickness of 1.2 mm to 1.8 mm, and the sound absorption layer has a thickness of 10 mm to 50 mm.

[0023] In this embodiment, preferably, the damping layer is made of a polyurethane layer with a t...

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 discloses a viscoelasticity composite sound insulating board. The sound insulating board comprises a damping layer (1), a sound insulating layer (2) and a sound absorption layer (3) which are sequentially arranged. One side of the damping layer (1) is attached to the surface of a shell of an underwater moving body, and the damping layer (1) is made of isotropous polyurethane or macromolecule resin. The sound insulating layer (2) is made of polyolefin elastomers or glass fibers. The sound absorption layer (3) is made of photosensitive resin, and closed cavities (4) are arranged in the sound absorption layer (3) in an array mode. According to the viscoelasticity composite sound insulating board, the damping layer can achieve the purposes of reducing vibration and absorbing noise; the sound insulating layer achieves a reinforcing effect, so that the entire composite sound insulating board has certain mechanical strength integrally, and meanwhile the sound insulating capacity of the multi-layer structure in a low-middle frequency band is adjusted; the sound absorption layer absorbs outside noise, reflection echoes are reduced, and due to the fact that the cavities are formed in the sound absorption layer, the sound absorption effect is further enhanced. By means of the viscoelasticity composite sound insulating board, low-frequency noise of underwater ships can be effectively absorbed, and the structure is simple.

Description

technical field [0001] The invention relates to a sound-absorbing structure, in particular to a multi-layer composite acoustic structure for underwater sound with a viscoelastic sound-absorbing layer. Background technique [0002] Underwater acoustic materials refer to the acoustic materials used in underwater facilities. With the emergence of nuclear-powered submarines and the development of underwater weapons, underwater detection technology plays an extremely important role. In recent years, nuclear submarines, large warships, super oil tankers and The number of passenger and cargo ships is increasing day by day, so the requirements for underwater acoustic system and underwater noise control are also getting higher and higher. At the same time, the types of shrouds, sound-transmitting windows, baffles, reflectors, anechoic coverings, and volumetric sound absorbers are also increasing, which greatly promotes the development of underwater acoustic materials. [0003] Under...

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): B32B3/26B32B27/08B32B27/12B32B17/02B32B17/06B32B27/32B32B27/40B32B7/12B32B33/00
CPCB32B3/26B32B7/12B32B17/02B32B17/064B32B27/08B32B27/12B32B27/32B32B27/40B32B33/00B32B2307/102B32B2307/546B32B2605/16
Inventor 王鲲鹏陶猛赵阳江坤
Owner GUIZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products