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Composite material silencing and noise-reducing acoustic liner and preparation method thereof

A technology of composite material and composite material layer, which is applied in the field of composite material noise reduction and noise reduction lining and its preparation, can solve the unfavorable noise reduction and noise reduction lining structure weight reduction and safety performance requirements, impact resistance, chemical corrosion resistance and fatigue resistance Insufficient performance, debonding of the panel and the honeycomb core, etc., to achieve excellent noise reduction effect, excellent sound insulation, anti-acoustic vibration, and good sound insulation performance

Active Publication Date: 2018-03-16
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the special position and working environment of the sound-absorbing and noise-reducing lining, the sound-lining components are relatively prone to debonding between the panel and the honeycomb core, and even the panels fall off and fly off.
Moreover, the metal panel has deficiencies in impact resistance, chemical corrosion resistance, fatigue resistance, etc., and its weight is relatively large, which is not conducive to the structural weight reduction and safety performance requirements of the sound-absorbing and noise-reducing lining.

Method used

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  • Composite material silencing and noise-reducing acoustic liner and preparation method thereof
  • Composite material silencing and noise-reducing acoustic liner and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] like figure 1 As shown, the acoustic lining includes a microporous panel, a honeycomb core and a backboard; the honeycomb core is located between the microporous panel and the backboard;

[0093]The face plate and the back plate are made of aramid fiber fabric medium-temperature curing epoxy resin hot-melt prepreg, and the adhesive film is 130°C medium-temperature curing film.

[0094] After the automatic blanking machine is used for blanking according to the layup and size requirements, the multi-layer prepreg is laid layer by layer on the forming female mold of the panel and the back panel according to the designed layup angle, and the composite prepreg stack is obtained. layer, and then use the vacuum bag / autoclave molding method to cure. When curing, the vacuum gauge pressure is not greater than -0.097MPa, the heating rate is 30°C / h, and the pressure is increased to 0.6MPa when the temperature rises to 130°C. After 30 minutes of heat preservation, continue When the...

Embodiment 2

[0103] The panel and the back panel are made of glass fiber fabric medium-temperature curing hot-melt prepreg, and the adhesive film is made of medium-temperature curing film at 130°C.

[0104] After the automatic blanking machine is used to blank the material according to the lay-up and size requirements, the multi-layer prepreg is laid on the molding mold layer by layer according to the designed lay-up angle to make a composite material prepreg laminate, and then use a vacuum bag / Autoclave molding method for curing. When curing, the vacuum gauge pressure is not greater than -0.097MPa, the heating rate is 20°C-40°C / h, when the temperature rises to 130°C, pressurize to 0.6MPa, and continue to heat up after 30min of heat preservation. When it reaches 130±5°C, keep it warm for 4 hours, and then cool down to below 60°C at a cooling rate of 30°C-50°C / h to complete the curing. After cooling down to room temperature, the panel and back panel are demoulded, and the rough edge of the ...

Embodiment 3

[0113] The face plate and the back plate use aramid fiber fabric high-temperature curing hot-melt prepreg, and the adhesive film adopts a high-temperature curing adhesive film at 180°C.

[0114] After the automatic blanking machine is used to blank the material according to the lay-up and size requirements, the multi-layer prepreg is laid on the molding mold layer by layer according to the designed lay-up angle to make a composite material prepreg laminate, and then use a vacuum bag / Autoclave molding method for curing. When curing, the vacuum gauge pressure is not greater than -0.097MPa, the heating rate is 20°C-40°C / h, when the temperature rises to 180°C, pressurize to 0.6MPa, and continue to heat up after 30min of heat preservation. When it reaches 180±5°C, keep it warm for 4 hours, and then cool down to below 60°C at a cooling rate of 30°C-50°C / h to complete the curing. After dropping to room temperature, the panel and back panel are demoulded, and the rough edge of the pro...

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Abstract

The invention provides a composite material silencing and noise-reducing acoustic liner and a preparation method thereof, belongs to the technical field of structural / functional integrated composite material molding, and mainly relates to a composite material microporous panel honeycomb sandwich structure silencing and noise-reducing acoustic liner assembly, a molding process method and applications thereof, specifically to layer spreading of aramid fiber and glass fiber reinforced epoxy resin-based composite prepreg, application of a polymer acoustic separation membrane material, and hot press tank curing molding. According to the present invention, a large number of micro-pores are processed on the composite material layer plate through the laser processing method; and the Nomex aramid paper honeycomb core, the composite material panel and the back plate are adhered and cured by the film-like adhesive to form the micro perforated plate composite material silencing and noise-reducingacoustic liner, wherein the silencing and noise-reducing acoustic liner can be the single-freedom-degree acoustic liner structure and the multi-freedom-degree acoustic liner structure, and can achievethe acoustic noise reduction function of aero engines.

Description

technical field [0001] The invention relates to a composite material sound-absorbing and noise-reducing lining and a preparation method thereof, belonging to the technical field of structure / function integrated composite material molding, and mainly relates to a composite material microporous panel honeycomb sandwich structure sound-absorbing and noise-reducing lining assembly and a forming process method thereof and applications, specifically involving aramid fiber and glass fiber reinforced epoxy resin-based composite material prepreg layup, autoclave curing molding, a large number of micropores are processed on the composite material laminate by laser processing, and Nomex aramid paper The honeycomb core, the composite material panel and the back panel are bonded and cured by a film-like adhesive to form a micro-perforated panel composite material sound-absorbing and noise-reducing lining, which can realize the acoustic noise-reducing function of an aero-engine. Background...

Claims

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Application Information

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IPC IPC(8): B32B27/04B32B27/10B32B3/12B32B27/38B32B7/12B32B3/24B32B37/12B32B37/06B32B37/10B32B38/04B64C1/40
CPCB32B3/12B32B3/266B32B7/12B32B27/10B32B27/38B32B37/06B32B37/10B32B37/1284B32B38/04B32B2037/1223B32B2038/0076B32B2038/047B32B2260/046B32B2262/0269B32B2262/101B32B2307/102B32B2307/552B32B2307/558B32B2307/718B32B2605/18B64C1/40
Inventor 易凯尹亮杨智勇尚呈元孙建波张毅郭鸿俊耿东兵
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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