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Pyramidal dot matrix scatterer inclusion-type underwater sound absorption structure

A lattice structure and scatterer technology, which is applied in the direction of sound-producing equipment and instruments to achieve the effects of excellent mechanical properties, simple structure and easy manufacture.

Pending Publication Date: 2019-09-06
XI AN JIAOTONG UNIV +1
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  • 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 pyramid-shaped lattice scatterer inclusion type underwater sound-absorbing structure to solve the failure of the traditional underwater sound-absorbing structure under deep water pressure and the problem of sound-absorbing materials. easy fall off puzzle

Method used

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  • Pyramidal dot matrix scatterer inclusion-type underwater sound absorption structure
  • Pyramidal dot matrix scatterer inclusion-type underwater sound absorption structure

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Embodiment 1

[0052] The thickness of the panel is 1.5mm, the thickness of the damping layer is 30mm, the Young's modulus of the material of the damping layer is 6MPa, the radius of the diagonal bar of the lattice is 1.5mm, the material of the embedded scatterer is lead, the diameter of the embedded scatterer is 5mm, and the distance of the embedded scatterer is above The distance between the panels is 0.01mm.

Embodiment 2

[0054] The thickness of the panel is 2mm, the thickness of the damping layer is 42mm, the Young's modulus of the material of the damping layer is 10MPa, the radius of the diagonal bar of the lattice is 2mm, the material of the embedded scatterer is iron, the diameter of the embedded scatterer is 10mm, and the distance from the top of the embedded scatterer is above The distance between the panels is 0.1mm.

Embodiment 3

[0056] The thickness of the panel is 2.5mm, the thickness of the damping layer is 40.83mm, the Young’s modulus of the damping layer material is 15MPa, the radius of the diagonal bar of the lattice is 2.5mm, the material of the embedded scatterer is aluminum, and the diameter of the embedded scatterer is 7mm. The distance from the top to the top panel is 1mm.

[0057] see figure 2 , the compression load borne by the present invention has a linear relationship with the equivalent strain, that is, the slope of the curve corresponds to the equivalent compression modulus of the structure. After calculation, we can get:

[0058] The equivalent compressive modulus of embodiment 1 is 461MPa;

[0059] The equivalent compressive modulus of embodiment 2 is 523MPa;

[0060] The equivalent compressive modulus of Example 3 is 797MPa.

[0061] Theoretically, the oblique rod is the most important load-bearing part in the lattice structure, and the larger the ratio of its cross-sectional ...

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Abstract

The invention discloses a pyramidal dot matrix scatterer inclusion-type underwater sound absorption structure, including a plurality of cells, each cell is provided with a pyramidal dot matrix structure and scatterers, and a plurality of cells are arranged in an array mode to form the pyramidal dot matrix scatterer inclusion-type underwater sound absorption structure.According to the pyramidal dotmatrix scatterer inclusion-type underwater sound absorption structure, excellent mechanical properties and good underwater sound absorption properties are provided, in design more adjustable parameters, including structural parameters and material parameters, can be adjusted according to needs of actual working conditions, the structure is simple, and manufacture is easy.

Description

technical field [0001] The invention belongs to the technical field of underwater sound-absorbing structures, and in particular relates to a pyramid-shaped lattice scatterer inclusion type underwater sound-absorbing structure. Background technique [0002] In order to meet the normal operation of the equipment under the hydrostatic pressure environment, most of the equipment casings are made of metal structures, such as alloy steel or high-strength aluminum alloy. When sound waves encounter such materials, they will be reflected at the interface, and the device will be completely exposed to the detection range of enemy sonar. Traditional equipment reduces energy reflection by covering sound-absorbing materials, while existing underwater sound-absorbing materials are mainly made of viscoelastic polymer materials, such as rubber, polyurethane, etc. Sound absorption performance. However, the structure of this steel plate plus sound-absorbing layer has technical problems such ...

Claims

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Application Information

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IPC IPC(8): G10K11/168
CPCG10K11/168
Inventor 辛锋先卢天健于晨磊段明宇
Owner XI AN JIAOTONG UNIV
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