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Composite material anti-bird strike baffle for aircraft nose

A composite material board and composite material technology are applied in the field of composite material anti-bird-collision baffles for aircraft noses, which can solve the problems of large influence on the maintainability of radomes, blocking passages for radome disassembly, and unfavorable aircraft economy. Achieve the effect of improving maintainability, strong impact resistance and improving rigidity

Active Publication Date: 2020-09-22
SHANDONG NON METALLIC MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The anti-bird strike honeycomb baffle with this structure can meet the anti-bird strike requirements, but its disadvantage is that it will block the passage for dismantling the radome, and the PMI foam board and the web of the nose are bonded and cannot be disassembled. Maintainability is greatly affected; moreover, the anti-bird-strike honeycomb baffle assembly of this structure causes a lot of weight gain in this area, which is not conducive to improving the economy of the aircraft

Method used

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  • Composite material anti-bird strike baffle for aircraft nose
  • Composite material anti-bird strike baffle for aircraft nose
  • Composite material anti-bird strike baffle for aircraft nose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The composite material anti-bird impact baffle for aircraft nose is composed of tooth plate 1 and composite material plate 2, such as figure 1 shown.

[0028] The tooth plate 1 is made of 2024-T3 aluminum alloy plate with a thickness of 1.5mm, and the surface is distributed with continuous protrusions 3, such as figure 2 shown. The protrusion 3 is a strip-like structure with an inverted V-shaped cross-section, a sharp-angled structure at the top, and a taper angle of 135° at the top. The tooth plate 1 is provided with a connecting hole, and the surrounding area of ​​the hole is a plane structure.

[0029] The composite material board 2 consists of three layers, the first and second layers are sandwich panels, which are formed by bonding the upper and lower skins and the honeycomb sandwich core, and the third layer is an aramid fiber composite material board. Among them, the upper and lower skins of the first layer of sandwich panels are both aramid fiber composite p...

Embodiment 2

[0033] The composite material anti-bird-collision baffle for the aircraft nose is composed of a tooth plate 1 and a composite material plate 2 .

[0034] The tooth plate 1 is made of 2024-T3 aluminum alloy plate with a thickness of 1.2mm, and the surface is distributed with continuous protrusions 3. The protrusion 3 is a strip-shaped structure with an inverted V-shaped cross-section, a rounded corner structure at the top, and a taper angle of 120° at the top. The tooth plate 1 is provided with a connecting hole, and the surrounding area of ​​the hole is a plane structure.

[0035] The composite material board 2 is composed of four layers, the first and third layers are sandwich panels, which are formed by bonding the upper and lower skins and the honeycomb sandwich core, and the second and fourth layers are aramid fiber composite material boards. The upper and lower skins of the two-layer sandwich panels are both carbon fiber composite panels, made of unidirectional carbon fi...

Embodiment 3

[0039] The composite material anti-bird-collision baffle for the aircraft nose is composed of a tooth plate 1 and a composite material plate 2 .

[0040] The tooth plate 1 is made of 2024-T3 aluminum alloy plate with a thickness of 1mm, and the surface is distributed with continuous protrusions 3, such as image 3 shown. The protrusion 3 is a pyramid structure, the upper tip is below, the bottom edge is square, the side length is 44mm, and the angle between the opposite cone surfaces is 90°.

[0041] The composite material panel 2 consists of three layers, all of which are sandwich panels, such as Figure 4 As shown, it is formed by bonding the upper and lower skins and the honeycomb core. Among them, the upper and lower skins of the first layer of sandwich panels are polyethylene fiber composite panels, made of polyethylene fiber orthogonal cloth and epoxy resin, with a density of 1.0 g / cm 3 , 1mm thick; the upper and lower skins of the second and third layers of sandwich ...

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Abstract

The invention relates to a composite material bird impact resistant baffle for an airplane nose. The composite material bird impact resistant baffle comprises a dental plate and a composite material plate, wherein the dental plate is positioned at the outer side of the composite material plate. Protrusions are distributed on the surface of the dental plate to play a role in breaking the bird boneand dispersing the impact force resulted from bird impact. A sandwich plate of the composite material plate adopts a composite material panel, which can reduce the weight and increase the strength compared with a traditional aluminum plate; a ductile composite material layer of the composite material plate is placed above a rigid composite material layer, accordingly, when subjected to impact force, the upper layer absorbs the energy and prevents the penetration, and the lower layer can transmit the impact force down to a greater extent, and the force on the unit area below is reduced. The composite material bird impact resistant baffle for the airplane nose provided by the invention has the advantages that the impact resistance is strong, so that a foam plate does not need to be installedbehind, and thus the size is reduced, and the maintainability of a radome is improved.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a composite material anti-bird-collision baffle for an aircraft nose. Background technique [0002] At present, in the structural design of the aircraft radome area, in order to meet the requirements of anti-bird strike, an anti-bird strike honeycomb baffle assembly is added to the nose radar cabin. The assembly is composed of aluminum alloy plate, aluminum honeycomb sandwich structure and PMI. It is composed of foam boards, wherein the aluminum honeycomb sandwich structure is located between two layers of aluminum alloy boards, and the PMI foam board is located at the rear. [0003] The anti-bird-collision honeycomb baffle of this structure can meet the requirements of anti-bird-collision, but its disadvantage is that it will block the passage for the disassembly of the radome, and the PMI foam board and the nose web are bonded and cannot be disassembled. The maintainability ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B3/28B32B3/24B32B3/12B32B27/02B32B27/12B32B3/06B64D45/00B32B27/34B32B9/00B32B9/04B32B27/04B32B15/14B32B15/20B32B3/08B32B1/06
CPCB32B3/06B32B3/08B32B3/12B32B3/266B32B3/28B32B5/02B32B5/26B32B15/14B32B15/20B32B2250/03B32B2260/021B32B2260/046B32B2262/0269B32B2262/106B32B2305/024B32B2307/558B32B2307/56B32B2605/18B64D45/00B64D2045/0095
Inventor 陈以蔚秦贞明王荣惠翟文李峰李树虎贾华敏王丹勇魏化震徐井利魏汝斌
Owner SHANDONG NON METALLIC MATERIAL RES INST
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