CN107804046B - A kind of composite material sound-deadening and noise-reducing sound lining and preparation method thereof - Google Patents
A kind of composite material sound-deadening and noise-reducing sound lining and preparation method thereof Download PDFInfo
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- CN107804046B CN107804046B CN201710842808.8A CN201710842808A CN107804046B CN 107804046 B CN107804046 B CN 107804046B CN 201710842808 A CN201710842808 A CN 201710842808A CN 107804046 B CN107804046 B CN 107804046B
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
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Abstract
The present invention relates to a kind of composite material sound-deadening and noise-reducing sound linings and preparation method thereof, belong to structure/function integration technical field of composite material molding, relate generally to composite microporous panel honeycomb sandwich construction sound-deadening and noise-reducing sound lining component and its moulding technique and application, more particularly to aramid fiber and glass fiber reinforced epoxy resin matrix composite prepreg laying, the application of macromolecule acoustic membrane material, solidification of hot-press tank molding, a large amount of micropores are processed on composite-material laminates by laser processing, Nomex aramid fiber paper honeycomb core is formed by curing a kind of microperforated panel composite material sound-deadening and noise-reducing sound lining by the way that membranaceous adhesive is Nian Jie with composite material face and backboard, the sound lining can be single-degree-of-freedom sound lining structure, it can also be multiple degrees of freedom sound lining structure, the acoustic noise reduction function of aero-engine may be implemented.
Description
Technical field
The present invention relates to a kind of composite material sound-deadening and noise-reducing sound linings and preparation method thereof, and it is multiple to belong to structure/function integration
Condensation material field shaping technique, relate generally to composite microporous panel honeycomb sandwich construction sound-deadening and noise-reducing sound lining component and its at
Type process and application, and in particular to aramid fiber and glass fiber reinforced epoxy resin matrix composite prepreg laying,
Solidification of hot-press tank molding, a large amount of micropores, Nomex aramid fiber paper honeycomb are processed by laser processing on composite-material laminates
Core is formed by curing a kind of microperforated panel composite material sound-deadening and noise-reducing by the way that membranaceous adhesive is Nian Jie with composite material face and backboard
Sound lining, may be implemented the acoustic noise reduction function of aero-engine.
Background technique
With the development of aero-engine pneumatic design technology, structure-design technique and composite technology, composite material
Attention of the application increasingly by the world each major engine manufacturer and research institution in big Bypass Ratio Turbofan Engine, this
The application for essentially consisting in composite material component, can be further improved the thrust ratio and fuel efficiency of aircraft, and greatly improve hair
The service life of motivation and security reliability, while noise and noxious gas emission are reduced, increase comfort, economy and environment and is applicable in
Property, meet airworthiness requirement.The high-strength lights such as the high specific strength and high specific stiffness that composite material has metal material incomparable are special
Property and excellent fatigue behaviour.Fan and engine weight can be mitigated using composite material, improve specific stiffness, fatigability
Energy, damage and defect tolerance etc., engine is the unique way for realizing higher bypass ratio and loss of weight simultaneously using advanced composite material
Diameter, this also provides maximum opportunity to expand the dosage of composite material on the engine.
Aircraft take off, land and flight course in along with various types of noises, noise source is numerous, frequency band distribution
Extensively, it is difficult to control or even elimination comprehensively.Since the noise of aircraft is mainly derived from engine, so engine noise control is winged
The key point of machine noise reduction just can be effectively solved making an uproar for aircraft as long as the noise of engine effectively can be controlled and be reduced
Sound.With the application of high bypass ratio engine, jet noise has no longer been the most important noise source of aero-engine, is replaced
Be fan noise.Fan noise respectively forwardly and back-propagation, and is based on Hai Muhuozi by nacelle import and pipe outlet
The sound lining noise reduction technology of resonant cavity sound absorption principle is the main means for reducing engine blower noise.
Domestic composite material sound-deadening and noise-reducing sound lining, using honeycomb sandwich construction, panel is formed porous using wire mesh
Structure is used for the incidence of sound source.External aero-engine engine sound lining denoising structure uses double sheets, and panel uses metal
The pure titanium of TA1, plate thickness 0.5mm.Due to sound-deadening and noise-reducing sound lining locating specific position and working environment, so that sound serves as a contrast component
Phenomena such as being easier the unsticking for panel and honeycomb core occur or even panel chip off-falling, flying off.And metal decking is in shock resistance
Property, resistant to chemical etching, fatigue performance etc. Shortcomings, and weight is larger, and the structure for being unfavorable for sound-deadening and noise-reducing sound lining subtracts
Weight and security performance requirement.
Summary of the invention
Technology of the invention solves the problems, such as: overcoming above-mentioned the deficiencies in the prior art, provides a kind of composite material noise reduction drop
Noise lining and preparation method thereof.
The technical solution of the invention is as follows:
A kind of composite material sound-deadening and noise-reducing sound lining, sound lining are composite microporous panel honeycomb sandwich construction sound-deadening and noise-reducing
Sound lining, including composite microporous panel, paper honeycomb core middle layer and composite material backboard；Paper honeycomb core middle layer is located at compound
Between material micropore panel and composite material backboard；
The material of the composite microporous panel is aramid fiber reinforced composite or glass fiber compound material；It is described
Composite microporous panel on have micropore, micropore size between 0.5-2.0mm, wear between 4.0-8.0mm by pitch of holes
Porosity 1-10%；Flange is had on four sides on the composite microporous panel, is parallel to two sides in course
There is drainage hole on the flange part having on side, the diameter of drainage hole is 2-5mm；
The material of the paper honeycomb core middle layer is Nomex aramid fiber paper honeycomb core, density 40-55kg/m3, described
Rhone is had on the face that paper honeycomb core middle layer is connect with backboard；
The material of the composite material backboard is aramid fiber reinforced composite or glass fiber compound material；
The composite microporous panel and composite material backboard is lamellae structure, with a thickness of 0.5-2.0mm.
Noise along porous panel hole into sound-deadening and noise-reducing inside configuration communication process, by the friction with hole wall first will
Part energy is converted into interior energy and noise of partially decaying, residual acoustic waves reflect step by step in honeycomb cavity and further decay.
It is vibrated in addition, different baffles will be generated when noise passes through microcellular structure and enters the cavity of interlayer honeycomb core, and both sound
Barrier vibration is overlapping will to generate a kind of resonance effects together, realize resonance effects sound-deadening and noise-reducing.
In above-mentioned composite microporous panel honeycomb sandwich construction sound-deadening and noise-reducing sound lining, panel uses aramid fiber/glass
Glass fiber reinforced epoxy resin based composites laminate, the backboard use aramid fiber/glass fiber reinforced epoxy resin base
Composite-material laminates.
The preparation method of composite microporous panel honeycomb sandwich construction sound-deadening and noise-reducing sound lining, includes the following steps:
The molding of step (1) panel
Aramid Prepreg or glass fibre prepreg are subjected to laying on the shaping female mold of panel, after coating vacuum bag,
Solidified in autoclave, panel is obtained after the completion of solidification；
Curing process are as follows: solidification temperature is 120-140 DEG C, and vacuum gauge pressure is not more than -0.097MPa, with 10 DEG C -40 DEG C/h
Heating rate heats up, solidifying pressure 0.5MPa-0.7MPa, curing time 2h-4h；Cool down later, 20 DEG C -60 of rate of temperature fall
DEG C/h, 60 DEG C are cooled to hereinafter, solidification is completed；
Step (2) machine adds
Micropore is processed using laser drill mode to the composite material face that step (1) obtains, then panel flange is carried out
Deburring and the machining of drainage hole；
The sizing of step (3) honeycomb, cutting
Honeycomb is fixed on honeycomb shaper surface, honeycomb of being formed under the conditions of 160-165 DEG C.It then will be stereotyped
Honeycomb is cut according to face plate profiles line, and processes rhone in the honeycomb side Nian Jie with backboard, obtains honeycomb core.
Step (4) assembling
One is respectively coated on the bonding plane for the composite material face that step (2) obtains and the bonding plane of composite material backboard
Tunic shape adhesive, that is, glue film, and air pressure is carried out to the glue film at panel micropore by the hot-air of certain temperature and flow and is opened
Hole bonds honeycomb core between panel and backboard, and carries out edge sealing using foamed glue, is then positioned and is solidified；Described
The temperature and flow of hot-air are respectively 40-60 DEG C and 0.1m3/s。
Step (5) solidification by cement
The assembly that step (4) is completed is placed in autoclave after solidification, and is demoulded and obtained composite material noise reduction drop
Noise lining.
Prepreg is aramid fiber or glass fiber reinforced epoxy resin base prepreg, specific packet in the step (one)
Reinforcement and resin are included, wherein reinforcement uses aramid fabric or glass fabric, and resin uses 130 DEG C of intermediate temperature settings
Epoxy resin or 180 DEG C of High Temperature Curing Epoxy Resin Systems；
Micro-group hole is processed by the way of laser drill to composite material face in the step (two)；
The honeycomb used in the step (three) is Nomex aramid fiber paper honeycomb；
In the step (4) adhesive using 130 DEG C of solidification medium temperature glue films, 130 DEG C of solidification high temperature glue films or
170 DEG C of solidification high temperature glue films；Foamed glue is solid using 130 DEG C of solidification medium temperature foamed glues, 130 DEG C of solidification high temperature foamed glues or 170 DEG C
Change high temperature foamed glue；
Solidifying pressure is 0.2~0.3MPa in the step (five), and heating rate is 10 DEG C~40 DEG C/h, rate of temperature fall
≤20℃/h。
A kind of composite material sound-deadening and noise-reducing sound lining, sound lining are composite microporous panel honeycomb sandwich construction sound-deadening and noise-reducing
Sound lining, including composite microporous panel, two layers of paper honeycomb core middle layer, composite microporous interlayer and backboard, sound lining from
In to being followed successively by composite microporous panel, one layer of paper honeycomb core middle layer, interlayer, another layer of paper honeycomb core middle layer and multiple outside
Condensation material backboard, the material of the interlayer are composite material or the composite material with high molecular material, the composite wood
Expect to have micropore on interlayer, and high molecular material is thin-film material and pore-free；The high molecular material is polyacrylic acid
Ester or nitrile rubber film, thickness 0.2-1mm；
Preparation method, (interlayer is composite-material laminates) steps are as follows:
The molding of step (1) panel and partition
Aramid Prepreg or glass fibre prepreg are subjected to laying on the shaping female mold of panel, after coating vacuum bag,
Solidified in autoclave, panel is obtained after the completion of solidification；
Aramid Prepreg or glass fibre prepreg are subjected to laying on the shaping female mold of partition, after coating vacuum bag,
Solidified in autoclave, partition is obtained after the completion of solidification；
Curing process are as follows: solidification temperature is 120-140 DEG C, and vacuum gauge pressure is not more than -0.097MPa, with 10 DEG C -40 DEG C/h
Heating rate heats up, solidifying pressure 0.5MPa-0.7MPa, curing time 2h-4h；Cool down later, 20 DEG C -60 of rate of temperature fall
DEG C/h, 60 DEG C are cooled to hereinafter, solidification is completed；
Step (2) machine adds
The composite material face and partition obtain to step (1) processes micropore using laser drill mode, then turns over to panel
Side carries out deburring and the machining of drainage hole；
The sizing of step (3) honeycomb, cutting
Two pieces of honeycombs are individually fixed in honeycomb shaper surface, honeycomb of being formed under the conditions of 160-165 DEG C.Then will
Stereotyped honeycomb is cut according to face plate profiles line, and processes rhone in the honeycomb side Nian Jie with backboard, obtains bee
Nest core.
Step (4) assembling
It is each on the bonding plane of composite material face and partition that step (2) obtains and the bonding plane of composite material backboard
It is coated with a tunic shape adhesive i.e. glue film, and is respectively coated with a tunic shape adhesive in the upper and lower surfaces of interlayer, and pass through
The hot-air of certain temperature and flow carries out air pressure aperture to the glue film at panel and partition micropore, glues between panel and interlayer
Honeycomb core is tied, and bonds honeycomb core between interlayer and backboard and edge sealing is carried out using foamed glue, is then positioned and is solidified；
The temperature and flow of the hot-air are respectively 40-60 DEG C and 0.1m3/s。
Step (5) solidification by cement
The assembly that step (4) is completed is placed in autoclave after solidification, and is demoulded and obtained composite material noise reduction drop
Noise lining.
Preparation method (interlayer is the composite-material laminates with macromolecule material film), steps are as follows:
The molding of step (1) panel and partition
Aramid Prepreg or glass fibre prepreg are subjected to laying on the shaping female mold of panel, after coating vacuum bag,
Solidified in autoclave, panel is obtained after the completion of solidification；
Aramid Prepreg or glass fibre prepreg are subjected to laying on the shaping female mold of partition, after coating vacuum bag,
Solidified in autoclave, partition is obtained after the completion of solidification；
Curing process are as follows: solidification temperature is 120-140 DEG C, and vacuum gauge pressure is not more than -0.097MPa, with 10 DEG C -40 DEG C/h
Heating rate heats up, solidifying pressure 0.5MPa-0.7MPa, curing time 2h-4h；Cool down later, 20 DEG C -60 of rate of temperature fall
DEG C/h, 60 DEG C are cooled to hereinafter, solidification is completed；
Step (2) machine adds
The composite material face and partition obtain to step (1) processes micropore using laser drill mode, then turns over to panel
Side carries out deburring and the machining of drainage hole；
The sizing of step (3) honeycomb, cutting
Two pieces of honeycombs are individually fixed in honeycomb shaper surface, honeycomb of being formed under the conditions of 160-165 DEG C.Then will
Stereotyped honeycomb is cut according to face plate profiles line, and processes rhone in the honeycomb side Nian Jie with backboard, obtains bee
Nest core.
Step (4) assembling
One is respectively coated on the bonding plane for the composite material face that step (2) obtains and the bonding plane of composite material backboard
Tunic shape adhesive, that is, glue film is respectively coated with one layer of glue film in the two pieces honeycomb core side Nian Jie with partition, and passes through certain temperature
And the hot-air of flow carries out air pressure aperture to the glue film at the glue film and honeycomb core at panel micropore, high molecular material is thin
Film is coated with interlayer composite material surface, and honeycomb core is bonded between panel and interlayer, honeycomb core edge using foamed glue into
Row edge sealing, is then positioned and is solidified；The temperature and flow of the hot-air are respectively 40-60 DEG C and 0.1m3/s。
Step (5) solidification by cement
The assembly that step (4) is completed is placed in autoclave after solidification, and is demoulded and obtained composite material noise reduction drop
Noise lining.
Compared with prior art, the present invention has the following advantages:
(1) present invention has carried out innovative design to the structure type of noise reduction noise-reducing acoustic liner, material technology etc., and adopts
With full composite material panel/honeycomb sandwich construction scheme, structural weight reduction is effectively realized；
(2) composite material face that uses of the present invention not only specific strength with higher, specific stiffness and low thermal conductivity, and
And a large amount of acoustics microcellular structure can be devised in composite-material laminates, is made it have according to engine power, noise spectrum
Excellent sound insulation acoustic resistive vibration, shock resistance；
(3) present invention devises interlayer in sandwich sound-deadening and noise-reducing sound lining, and in the composite material micropunch of interlayer
Have noise reducing damping macromolecule material film on plate, makes it have broader noise reduction frequency band, superior noise reduction effect；
(4) a large amount of acoustics microcellular structure is distributed in the composite material face that the present invention uses, and is the side by laser machining
Formula processing is prepared；
(5) sandwich structure piece core material of the present invention has light weight, shock resistance, sound-absorbing, sound insulation using Nomex aramid fiber honeycomb core
The excellent characteristics such as performance is good, with microcellular structure aramid fiber reinforced composite panel cooperative achievement sound-deadening and noise-reducing function；
(6) present invention uses the molding work of heat air method in the preparation process of preparation sandwich sound-deadening and noise-reducing sound lining
Skill technology reduces the percentage of plugged hole of the microperforated panel of the sandwich after bonding solidifies；
(7) composite microporous panel honeycomb sandwich construction sound-deadening and noise-reducing sound lining of the present invention can be used for disappearing for aero-engine
Sound noise reduction, the sound lining structure of preparation is light-weight, can effectively absorb/reduce noise, excellent combination property.
(8) sound of the invention lining is that a kind of composite microporous panel honeycomb interlayer sound-deadening and noise-reducing sound serves as a contrast, and has structure weight
Amount is light, anti-fatigue performance is excellent, structure can design the characteristics of widening noise reduction frequency band and improving noise reduction effect.Wherein, five layers
The composite material sound-deadening and noise-reducing sound of structure serves as a contrast, and can wherein damp with a variety of macromolecules on the composite microporous plate of wall
Noise reduction film, can be further improved noise reduction effect.It can be applied to turbofan aerial engine fan casing sound attenuation features, and can expire
The urgent need of sufficient airliner or transporter turbofan aero-engine sound-deadening and noise-reducing sound lining.
(9) the present invention provides a kind of composite material sound-deadening and noise-reducing sound lining and its technologies of preparing, are related to composite material sound lining
Structure design, sound lining structure material and moulding technique field；The present invention passes through aramid fiber or glass fiber reinforcement epoxy
Polymer matrix composites panel, partition, backboard molding preparation, in panel and partition by way of laser boring or machining
The micropore of upper processing diameter 0.5-2.0mm, sandwich layer Nomex aramid fiber paper honeycomb core layer thermal finalization have damping noise-reducing on partition
Panel, intermediate course, partition and backboard are bonded using membranaceous adhesive, become sound-deadening and noise-reducing sound lining by macromolecule material film
Structural member.Composite material sound-deadening and noise-reducing sound lining has wider sound sucting band and preferable sound-deadening and noise-reducing effect.The present invention
It overcomes that existing metal noise-reducing acoustic liner weight is big, deficiencies of poor fatigue properties, it is compound to solve aramid fiber using laser boring
Material panel is machined the technical problem of drilling precision difference, has damping noise-reducing high molecular material using multilayered structure and interlayer
The method of film, aramid fiber/glass fiber compound material micropore panel honeycomb sandwich construction sound-deadening and noise-reducing sound lining tool of preparation
There are superior weatherability and damping noise-reducing performance, preparation method simple possible.
Detailed description of the invention
Fig. 1 is the three-decker schematic diagram that sound of the invention serves as a contrast；
Fig. 2 is the five-layer structure schematic diagram that sound of the invention serves as a contrast.
Specific embodiment
A kind of composite material sound-deadening and noise-reducing sound lining: sound-deadening and noise-reducing sound lining is prepared using composite material, panel is high-performance
Aramid fiber reinforced epoxy based composites micropore panel or glass fiber reinforced epoxy resin based composites micropore face
Plate, intermediate course are Nomex aramid fiber paper honeycomb core, and backboard is high-performance aramid fiber reinforced epoxy based composites rigidity
Backboard or glass fiber reinforced epoxy resin based composites rigid back, by membranaceous adhesive by panel, intermediate course and
Backboard bonding solidifies.Its sqouynd absorption lowering noise method serves as a contrast denoising structure internal communication to sound in the hole along porous panel for noise
In the process, part is decayed and the friction with hole wall first converts interior energy for part energy, and residual acoustic waves are in honeycomb cavity
In reflect and further decay step by step.The sound serves as a contrast the sound-deadening and noise-reducing that can be used for turbofan aero-engine.
The composite material face of sound lining uses the laminate of 1.0-2.0mm thickness, and the micropore size being distributed on laminate is in 0.5-
Between 2.0mm, pitch of holes is between 4.0-8.0mm, punching rate 1-10%；The intermediate course uses Nomex aramid fiber paper wasp
Nest core, height 10.0-30.0mm, density is in 40-55kg/m3, honeycomb core cell side length 1.5-2.0mm；The backboard of sound lining uses
Aramid fiber/glass fiber reinforced epoxy resin based composites preparation laminate, thickness 0.5-2.0mm.
The sound lining structure is plate external form or cambered surface external form, and panel and honeycomb core material can be as needed according to certain radians
Molding preparation.
The installation of sound-deadening and noise-reducing sound lining has directionality, and noise source must enter via the micropore of the composite material face
Sandwich cavity.
Sound-deadening and noise-reducing sound lining can be served as a contrast by more than one piece sound-deadening and noise-reducing sound is assembled into complete round sound-deadening and noise-reducing sound lining structure group
Part.
Technology of preparing is as follows:
The molding of step (1) panel
Aramid fiber or glass prepreg are subjected to laying on shaping mould, after coating vacuum bag, solidified in autoclave,
Curing process are as follows: vacuum gauge pressure is not more than -0.097MPa, is heated up with 10 DEG C -40 DEG C/h heating rate, solidifying pressure
0.5MPa-0.7MPa, curing time 2h-4h；Cool down later, 20 DEG C -60 DEG C/h of rate of temperature fall is cooled to 60 DEG C hereinafter, solidification
It completes；
Step (2) machine adds
Micropore is processed using laser drill mode to composite material face.
The sizing of step (3) honeycomb, cutting
Honeycomb is fixed on honeycomb shaper surface, honeycomb of being formed under the conditions of 160-165 DEG C.It then will be stereotyped
Honeycomb is cut according to face plate profiles line.
Step (4) assembling
A tunic shape is coated in composite material face and honeycomb core bonding plane and composite material backboard and honeycomb core bonding plane
Adhesive, and by assembling positioning tool positioning, panel and backboard are carried out with cellular abutting edge it is be bonded, and using foamed glue
To being filled within the scope of sound lining structure periphery 1-2cm.
Step (5) solidification by cement
The sound lining that step (4) is completed is placed in autoclave and is solidified, composite microporous panel is obtained after demoulding
Honeycomb sandwich construction sound-deadening and noise-reducing sound lining.
Glue film uses 130 DEG C of intermediate temperature setting glue films or 170 DEG C of solidification high temperature glue films in the step (4).
Solidification by cement pressure is 0.2~0.3MPa in the step (5), and heating rate is 10 DEG C~40 DEG C/h, solidification temperature
Degree is 130 DEG C or 170 DEG C, soaking time 2-3h, rate of temperature fall≤20 DEG C/h.
Prepreg is aramid fiber/glass fiber reinforced epoxy resin base prepreg in the step (1), is specifically included
Reinforcement and resin, wherein reinforcement uses aramid fabric/glass fabric, and resin uses 130 DEG C of intermediate temperature setting rings
Oxygen resin or 180 DEG C of High Temperature Curing Epoxy Resin Systems.
Composite microporous panel honeycomb sandwich construction sound-deadening and noise-reducing sound lining and its component can be applied to airliner or fortune
Defeated machine turbofan aero-engine sound-deadening and noise-reducing structure.
The present invention is described in further detail in the following with reference to the drawings and specific embodiments:
Embodiment 1
As shown in Figure 1, the sound lining bag includes micropore panel, honeycomb core and backboard；The honeycomb core be located at micropore panel and
Between backboard；
Panel and backboard use aramid fabric intermediate temperature setting epoxy resin sweat connecting material, and glue film is using in 130 DEG C
Warm solidified glue film.
It is required after carrying out blanking using automatic blanking machine according to laying and size, presses design laying angle for multilayer prepreg
It is successively laid on the shaping female mold of panel and backboard, material prepreg lamination is made, then use vacuum bag/autoclave
Molding mode is solidified, and when solidification, vacuum gauge pressure is not more than -0.097MPa, 30 DEG C/h of heating rate, and temperature rises to 130 DEG C
When be forced into 0.6MPa, keep the temperature the subsequent temperature of continuing rising of 30min, when being warming up to 130 ± 5 DEG C, keep the temperature 4h, then cooled down speed with 40 DEG C/h
Rate is cooled to 60 DEG C or less solidifications and completes, and is cooled to room temperature demoulding and obtains panel and backboard, nothing after modifying to product flash
Damage detection is stand-by.
Use the mode of laser processing to composite material face processing diameter for the micropore of 2.0mm, punching rate 5%.
Use the high 20mm of core, honeycomb specification for 40g/m3Nomex honeycomb according to outer panels shaper surface, 165
It is formed under the conditions of DEG C honeycomb.Then stereotyped honeycomb is cut according to outer panels contour line, in itself and backboard bonding
Rhone is processed on face.
The panel of non-destructive testing qualification, backboard are placed on assembling curing mold, the face finishing of carry out type is trimmed to needs
Outer dimension, and its bonding plane is carried out to paste intermediate temperature setting glue film after polishing cleaning, then Nomex honeycomb above and below
Intermediate temperature setting glue film is integrally pasted in type face, and is 40 DEG C by temperature and flow is 0.1m3The hot-air of/s to panel micropore at
Glue film carry out air pressure aperture, bond honeycomb core between panel and backboard, and edge sealing is carried out using foamed glue.
After being completed panel, honeycomb core and backboard, product is coated, and vacuumizes compacting, vacuum pressure
No more than -0.097MPa, it is compacted time 3h, after compacting, removes covering material, and ruler appropriate is carried out according to type face laminating degree
Very little finishing is assembled in product surface after finishing.
The sandwich structure piece to be solidified that group is installed is placed in heat-pressure curing in autoclave, solidifying pressure 0.3MPa,
Solidification temperature is 130 DEG C, solidifies 2~4h of soaking time, and heating rate is 25 DEG C~35 DEG C/h, rate of temperature fall≤15 DEG C/h, drop
Temperature is to 60 DEG C hereinafter, solidification is completed.
Temperature can demould after being down to room temperature, carry out excessive glue cleaning to product after demoulding, and carry out non-destructive testing, and detect
After qualification, mechanical tapping is carried out to the micropore of glue film excessive glue blocking, obtains final product after cleaning.
The sound prepared lining is mounted in a circumferential direction on about 1~2 meter of diameter of casing inner wall, and is rung by alliteration
Room test system and test does not install the difference of the sound transmission loss after sound lining and installation sound lining, obtains composite material sound-deadening and noise-reducing sound
The noise abatement of lining.By measurement, the acoustic noise reduction level of embodiment 1 is up to 5dB.
Embodiment 2
Panel and backboard use glass fabric intermediate temperature setting sweat connecting material, and glue film uses 130 DEG C of intermediate-temperature glues
Film.
It is required after carrying out blanking using automatic blanking machine according to laying and size, presses design laying angle for multilayer prepreg
It is successively laid on molding die, material prepreg lamination is made, then carried out using vacuum bag/autoclave molding mode
Solidification, when solidification, vacuum gauge pressure is not more than -0.097MPa, 20 DEG C -40 DEG C/h of heating rate, and temperature is forced into when rising to 130 DEG C
0.6MPa keeps the temperature the subsequent temperature of continuing rising of 30min, when being warming up to 130 ± 5 DEG C, 4h is kept the temperature, then with 30 DEG C -50 DEG C/h rate of temperature fall
It is cooled to 60 DEG C or less solidifications to complete, is cooled to room temperature demoulding and obtains panel and backboard, it is lossless after being modified to product flash
Detection is stand-by.
Use the mode of laser processing to composite material face processing diameter for the micropore of 2.0mm, punching rate 5%.
Use the high 20mm of core, honeycomb specification for 40g/m3Nomex honeycomb according to outer panels shaper surface, in 160-
It is formed under the conditions of 165 DEG C honeycomb.Then stereotyped honeycomb is cut according to outer panels contour line.
The outer panels of non-destructive testing qualification, backboard are placed on assembling curing mold, the face finishing of carry out type is trimmed to needs
Outer dimension, and its bonding plane is carried out to paste intermediate temperature setting glue film after polishing cleaning, then on Nomex honeycomb and under
Intermediate temperature setting glue film is integrally pasted in face type face, and is 40 DEG C by temperature and flow is 0.1m3The hot-air of/s is to panel micropore
The glue film at place carries out air pressure aperture, honeycomb core is bonded between panel and backboard, and carry out edge sealing using foamed glue.
After being completed panel, honeycomb core and backboard, product is coated, and vacuumizes compacting, vacuum pressure
No more than -0.097MPa, it is compacted time 3h, after compacting, removes covering material, and ruler appropriate is carried out according to type face laminating degree
Very little finishing is assembled in product surface after finishing.
The sandwich structure piece to be solidified that group is installed is placed in heat-pressure curing in autoclave, solidifying pressure 0.3MPa,
Solidification temperature is 130 DEG C, solidifies 2~4h of soaking time, and heating rate is 25 DEG C~35 DEG C/h, rate of temperature fall≤15 DEG C/h, drop
Temperature is to 60 DEG C hereinafter, solidification is completed.
Temperature can demould after being down to room temperature, carry out excessive glue cleaning to product after demoulding, and carry out non-destructive testing, and detect
After qualification, mechanical tapping is carried out to the micropore of glue film excessive glue blocking, obtains final product after cleaning.
The sound prepared lining is mounted in a circumferential direction on 1~2 meter of diameter of casing inner wall, and room is rung by alliteration
Test system and test does not install the difference of the sound transmission loss after sound lining and installation sound lining, obtains composite material sound-deadening and noise-reducing sound lining
Noise abatement.By measurement, the acoustic noise reduction level of embodiment 2 is up to 5dB.
Embodiment 3
Panel and backboard use aramid fabric hot setting sweat connecting material, and glue film uses 180 DEG C of high temperature setting glues
Film.
It is required after carrying out blanking using automatic blanking machine according to laying and size, presses design laying angle for multilayer prepreg
It is successively laid on molding die, material prepreg lamination is made, then carried out using vacuum bag/autoclave molding mode
Solidification, when solidification, vacuum gauge pressure is not more than -0.097MPa, 20 DEG C -40 DEG C/h of heating rate, and temperature is forced into when rising to 180 DEG C
0.6MPa keeps the temperature the subsequent temperature of continuing rising of 30min, when being warming up to 180 ± 5 DEG C, 4h is kept the temperature, then with 30 DEG C -50 DEG C/h rate of temperature fall
It is cooled to 60 DEG C or less solidifications to complete, is cooled to room temperature demoulding and obtains panel and backboard, it is lossless after being modified to product flash
Detection is stand-by.
Use the mode of laser processing to composite material face processing diameter for the micropore of 2.0mm, punching rate 5%.
Use the high 20mm of core, honeycomb specification for 40g/m3Nomex honeycomb according to outer panels shaper surface, in 160-
It is formed under the conditions of 165 DEG C honeycomb.Then stereotyped honeycomb is cut according to outer panels contour line.
The outer panels of non-destructive testing qualification, backboard are placed on assembling curing mold, the face finishing of carry out type is trimmed to needs
Outer dimension, and its bonding plane is carried out to paste hot setting glue film after polishing cleaning, then on Nomex honeycomb and under
Hot setting glue film is integrally pasted in face type face, and is 40 DEG C by temperature and flow is 0.1m3The hot-air of/s is to panel micropore
The glue film at place carries out air pressure aperture, honeycomb core is bonded between panel and backboard, and carry out edge sealing using foamed glue.
After being completed panel, honeycomb core and backboard, product is coated, and vacuumizes compacting, vacuum pressure
No more than -0.097MPa, it is compacted time 3h, after compacting, removes covering material, and ruler appropriate is carried out according to type face laminating degree
Very little finishing is assembled in product surface after finishing.
The sandwich structure piece to be solidified that group is installed is placed in heat-pressure curing in autoclave, solidifying pressure 0.2MPa,
Solidification temperature is 180 DEG C, solidifies 2~4h of soaking time, and heating rate is 25 DEG C~35 DEG C/h, rate of temperature fall≤15 DEG C/h, drop
Temperature is to 60 DEG C hereinafter, solidification is completed.
Temperature can demould after being down to room temperature, carry out excessive glue cleaning to product after demoulding, and carry out non-destructive testing, and detect
After qualification, mechanical tapping is carried out to the micropore of glue film excessive glue blocking, obtains final product after cleaning.
The sound prepared lining is mounted in a circumferential direction on about 1~2 meter of diameter of casing inner wall, and is rung by alliteration
Room test system and test does not install the difference of the sound transmission loss after sound lining and installation sound lining, obtains composite material sound-deadening and noise-reducing sound
The noise abatement of lining.By measurement, the acoustic noise reduction level of embodiment 3 is up to 5dB.
Embodiment 4
As shown in Fig. 2, the sound lining bag includes micropore panel, two layers of honeycomb core, interlayer and backboard, wherein one layer of honeycomb core is located at
Between micropore panel and interlayer, another layer of honeycomb core is between interlayer and backboard；
Panel, backboard and interlayer use aramid fabric intermediate temperature setting epoxy resin sweat connecting material, and glue film uses 130
DEG C intermediate temperature setting glue film.
It is required after carrying out blanking using automatic blanking machine according to laying and size, presses design laying angle for multilayer prepreg
Successively be laid on the shaping female mold of panel, backboard and partition, be made material prepreg lamination, then using vacuum bag/
Autoclave molding mode is solidified, and when solidification, vacuum gauge pressure is not more than -0.097MPa, 30 DEG C/h of heating rate, and temperature rises to
It is forced into 0.6MPa at 130 DEG C, keeps the temperature the subsequent temperature of continuing rising of 30min, when being warming up to 130 ± 5 DEG C, 4h is kept the temperature, then with 40 DEG C/h
Rate of temperature fall is cooled to 60 DEG C or less solidifications and completes, and is cooled to room temperature demoulding and obtains panel, backboard and partition, to product flash into
Non-destructive testing is stand-by after row finishing.
Use the mode of laser processing to processing diameter on composite material face and partition for the micropore of 2.0mm, punching rate
5%.
Use the high 20mm of core, honeycomb specification for 40g/m3Nomex honeycomb according to outer panels shaper surface, 165
It is formed under the conditions of DEG C honeycomb.Then stereotyped honeycomb is cut according to outer panels contour line, in itself and backboard bonding
Rhone is processed on face.
The panel, backboard and partition of non-destructive testing qualification are placed on assembling curing mold, the face finishing of carry out type is trimmed to
The outer dimension needed, and intermediate temperature setting glue film is pasted after carrying out polishing cleaning to the bonding plane of panel and backboard, including subsequent,
One layer of intermediate temperature setting glue film of each paving in the outer Nomex honeycomb side Nian Jie with partition, and be 40 DEG C by temperature and flow is
0.1m3The hot-air of/s carries out air pressure aperture to the glue film at panel micropore and at honeycomb, glues between panel, backboard and partition
Honeycomb core is tied, and edge sealing is carried out using foamed glue.
After being completed panel, inside and outside honeycomb core, partition and backboard, product is coated, and vacuumizes compacting,
Vacuum pressure is not more than -0.097MPa, is compacted time 3h, after compacting, removes covering material, and carry out according to type face laminating degree
Size finishing appropriate, is assembled in product surface after finishing.
The sandwich structure piece to be solidified that group is installed is placed in heat-pressure curing in autoclave, solidifying pressure 0.3MPa,
Solidification temperature is 130 DEG C, solidifies 2~4h of soaking time, and heating rate is 25 DEG C~35 DEG C/h, rate of temperature fall≤15 DEG C/h, drop
Temperature is to 60 DEG C hereinafter, solidification is completed.
Temperature can demould after being down to room temperature, carry out excessive glue cleaning to product after demoulding, and carry out non-destructive testing, and detect
After qualification, mechanical tapping is carried out to the micropore of glue film excessive glue blocking, obtains final product after cleaning.
The sound prepared lining is mounted in a circumferential direction on 1~2 meter of diameter of casing inner wall, and room is rung by alliteration
Test system and test does not install the difference of the sound transmission loss after sound lining and installation sound lining, obtains composite material sound-deadening and noise-reducing sound lining
Noise abatement.By measurement, the acoustic noise reduction level of embodiment 4 is up to 5.5dB.
Embodiment 5
As shown in Fig. 2, panel, backboard and interlayer use aramid fabric intermediate temperature setting epoxy resin sweat connecting material,
Glue film uses 130 DEG C of intermediate temperature setting glue films, has polyacrylate macromolecule material film on interlayer.
It is required after carrying out blanking using automatic blanking machine according to laying and size, presses design laying angle for multilayer prepreg
Successively be laid on the shaping female mold of panel, backboard and partition, be made material prepreg lamination, then using vacuum bag/
Autoclave molding mode is solidified, and when solidification, vacuum gauge pressure is not more than -0.097MPa, 30 DEG C/h of heating rate, and temperature rises to
It is forced into 0.6MPa at 130 DEG C, keeps the temperature the subsequent temperature of continuing rising of 30min, when being warming up to 130 ± 5 DEG C, 4h is kept the temperature, then with 40 DEG C/h
Rate of temperature fall is cooled to 60 DEG C or less solidifications and completes, and is cooled to room temperature demoulding and obtains panel, backboard and partition, to product flash into
Non-destructive testing is stand-by after row finishing.
Use the mode of laser processing to processing diameter on composite material face and partition for the micropore of 2.0mm, punching rate
5%.
Use the high 20mm of core, honeycomb specification for 40g/m3Nomex honeycomb according to outer panels shaper surface, 165
It is formed under the conditions of DEG C honeycomb.Then stereotyped honeycomb is cut according to outer panels contour line, in itself and backboard bonding
Rhone is processed on face.
The panel, backboard and partition of non-destructive testing qualification are placed on assembling curing mold, the face finishing of carry out type is trimmed to
The outer dimension needed, and intermediate temperature setting glue film is pasted after carrying out polishing cleaning to the bonding plane of panel and backboard, including subsequent,
One layer of intermediate temperature setting glue film of each paving in the outer Nomex honeycomb side Nian Jie with partition, and be 40 DEG C by temperature and flow is
0.1m3The hot-air of/s carries out air pressure aperture, one strata third of laying in partition side to the glue film at panel micropore and at honeycomb
Olefin(e) acid ester macromolecule material film bonds honeycomb core between panel, backboard and partition, and carries out edge sealing using foamed glue.
After panel, inside and outside honeycomb core, the partition with macromolecule material film and backboard are completed, to product into
Row cladding, and compacting is vacuumized, vacuum pressure is not more than -0.097MPa, is compacted time 3h, after compacting, covering material is removed, and
Size finishing appropriate is carried out according to type face laminating degree, is assembled in product surface after finishing.
The sandwich structure piece to be solidified that group is installed is placed in heat-pressure curing in autoclave, solidifying pressure 0.3MPa,
Solidification temperature is 130 DEG C, solidifies 2~4h of soaking time, and heating rate is 25 DEG C~35 DEG C/h, rate of temperature fall≤15 DEG C/h, drop
Temperature is to 60 DEG C hereinafter, solidification is completed.
Temperature can demould after being down to room temperature, carry out excessive glue cleaning to product after demoulding, and carry out non-destructive testing, and detect
After qualification, mechanical tapping is carried out to the micropore of glue film excessive glue blocking, obtains final product after cleaning.
The sound prepared lining is mounted in a circumferential direction on 1~2 meter of diameter of casing inner wall, and room is rung by alliteration
Test system and test does not install the difference of the sound transmission loss after sound lining and installation sound lining, obtains composite material sound-deadening and noise-reducing sound lining
Noise abatement.By measurement, the acoustic noise reduction level of embodiment 5 is up to 6dB.
The above, optimal specific embodiment only of the invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
The content that description in the present invention is not described in detail belongs to the well-known technique of professional and technical personnel in the field.
Claims (2)
1. a kind of composite material sound-deadening and noise-reducing sound lining, it is characterised in that: the sound lining bag includes micropore panel, honeycomb core and backboard；Institute
The honeycomb core stated is between micropore panel and backboard；
The material of the micropore panel is aramid fiber reinforced epoxy based composites or glass fiber reinforced epoxy
Resin-based composite；
Micropore is had on the micropore panel；
The material of the backboard is aramid fiber reinforced epoxy based composites or glass fiber reinforced epoxy resin base
Composite material；
Micropore size on the micropore panel is 0.5-2.0mm, pitch of holes 4.0-8.0mm, punching rate 1%-10%；
Flange is had on four sides of the micropore panel, is parallel to the flange part having on two sides in course
On have a drainage hole, the diameter of drainage hole is 2-5mm；
The material of the honeycomb core is Nomex aramid fiber paper honeycomb core, density 40-55kg/m3, the honeycomb core and backboard
Rhone is had on the face of connection；
The micropore panel and backboard are lamellae structure, and with a thickness of 0.5-2.0mm, panel uses aramid fiber/glass fibers
Reinforced epoxy based composites laminate is tieed up, backboard uses aramid fiber/glass fiber reinforced epoxy resin based composites
Laminate；
The preparation method of composite material sound-deadening and noise-reducing sound lining, includes the following steps:
The molding of step (1) panel
Aramid Prepreg or glass fibre prepreg are subjected to laying on the shaping female mold of panel, after coating vacuum bag, in heat
Solidified in pressure tank, panel is obtained after the completion of solidification；
Step (2) machine adds
Micropore is processed to the panel that step (1) obtains, then deburring and the machining of drainage hole are carried out to panel flange；
The sizing of step (3) honeycomb, cutting
Honeycomb is carried out shaping under the conditions of 160-165 DEG C, then cuts stereotyped honeycomb according to face plate profiles line,
And rhone is processed in the honeycomb side Nian Jie with backboard, obtain honeycomb core；
Step (4) assembling
It is respectively coated with one layer of glue film on the bonding plane for the panel that step (2) obtains and the bonding plane of backboard, then passes through hot-air
Air pressure aperture, the bee that between panel and backboard prepared by adhesion step (3) after the completion of aperture are carried out to the glue film at panel micropore
Nest core, and edge sealing is carried out using foamed glue, it is then positioned and is solidified, obtain assembly；The temperature of the hot-air is
40-60 DEG C, flow 0.08-0.12m3/s；
Step (5) solidification by cement
The assembly that step (4) is completed is placed in autoclave after solidification, and demoulding obtains composite material sound-deadening and noise-reducing sound
Lining；
In the step (one), curing process are as follows: solidification temperature is 120-140 DEG C, and vacuum gauge pressure is not more than -0.097MPa,
It is heated up with 10 DEG C -40 DEG C/h heating rate, solidifying pressure 0.5MPa-0.7MPa, curing time 2h-4h；Cool down later, drops
Warm 20 DEG C -60 DEG C/h of rate is cooled to 60 DEG C hereinafter, solidification is completed；
Prepreg is aramid fiber or glass fiber reinforced epoxy resin base prepreg in the step (one), specifically includes increasing
Strong body and resin, wherein reinforcement uses aramid fabric or glass fabric, and resin uses 130 DEG C of intermediate temperature setting epoxies
Resin or 180 DEG C of High Temperature Curing Epoxy Resin Systems；
In the step (two), micropore is processed by the way of laser drill to composite material face；The step (three)
The middle honeycomb used is Nomex aramid fiber paper honeycomb；In the step (4) glue film using 130 DEG C of solidification medium temperature glue films,
130 DEG C of solidification high temperature glue films or 170 DEG C of solidification high temperature glue films；Foamed glue is using 130 DEG C of solidification medium temperature foamed glues, 130 DEG C of solidifications
High temperature foamed glue or 170 DEG C of solidification high temperature foamed glues；Solidifying pressure is 0.2~0.3MPa, heating speed in the step (five)
Rate is 10 DEG C~40 DEG C/h, rate of temperature fall≤20 DEG C/h.
2. a kind of composite material sound-deadening and noise-reducing sound lining, it is characterised in that: the sound lining bag includes micropore panel, two layers of honeycomb core, interlayer
And backboard, wherein one layer of honeycomb core, between micropore panel and interlayer, another layer of honeycomb core is between interlayer and backboard；
The material of the micropore panel is aramid fiber reinforced composite or glass fiber compound material；
Micropore is had on the micropore panel；
The material of the backboard is aramid fiber reinforced composite or glass fiber compound material；
The interlayer is composite-material laminates；
The interlayer further includes the macromolecule material film above composite-material laminates, is had on composite-material laminates micro-
Hole；The high molecular material be polyacrylate or nitrile rubber, macromolecule material film with a thickness of 0.2-1mm；
Micropore size on the micropore panel is 0.5-2.0mm, pitch of holes 4.0-8.0mm, punching rate 1%-10%；
Flange is had on four sides of the micropore panel, is parallel to the flange part having on two sides in course
On have a drainage hole, the diameter of drainage hole is 2-5mm；
The material of the honeycomb core is Nomex aramid fiber paper honeycomb core, density 40-55kg/m3, the honeycomb core and backboard
Rhone is had on the face of connection；
The micropore panel and backboard are lamellae structure, and with a thickness of 0.5-2.0mm, panel uses aramid fiber/glass fibers
Reinforced epoxy based composites laminate is tieed up, backboard uses aramid fiber/glass fiber reinforced epoxy resin based composites
Laminate；
The preparation method of composite material sound-deadening and noise-reducing sound lining, it is characterised in that include the following steps:
The molding of step (1) panel and partition
Aramid Prepreg or glass fibre prepreg are subjected to laying on the shaping female mold of panel, after coating vacuum bag, in heat
Solidified in pressure tank, panel is obtained after the completion of solidification；
Aramid Prepreg or glass fibre prepreg are subjected to laying on the shaping female mold of partition, after coating vacuum bag, in heat
Solidified in pressure tank, partition is obtained after the completion of solidification；
Step (2) machine adds
Panel and partition the processing micropore obtain to step (1), then the machinery for carrying out deburring and drainage hole to panel flange add
Work；
The sizing of step (3) honeycomb, cutting
Two pieces of honeycombs are carried out shaping under the conditions of 160-165 DEG C respectively, then by stereotyped honeycomb according to face plate profiles line
It is cut, and processes rhone in the honeycomb side Nian Jie with backboard, obtain two pieces of honeycomb cores；
Step (4) assembling
One layer of glue film is respectively coated on the bonding plane for the panel that step (2) obtains and the bonding plane of backboard, two pieces of honeycomb cores with
The side of partition bonding is respectively coated with one layer of glue film, and by hot-air to the glue film at the glue film and honeycomb core at panel micropore
Air pressure aperture is carried out, macromolecule material film is then coated with interlayer composite material surface, is bonded between panel and interlayer
One piece of honeycomb core carries out edge sealing using foamed glue at honeycomb core edge, is then positioned and solidified, obtain assembly；It is described
Hot-air temperature be 40-60 DEG C, flow 0.08-0.12m3/s；
Step (5) solidification by cement
The assembly that step (4) is completed is placed in autoclave after solidification, and is demoulded and obtained composite material sound-deadening and noise-reducing sound
Lining；
In the step (one), curing process are as follows: solidification temperature is 120-140 DEG C, and vacuum gauge pressure is not more than -0.097MPa,
It is heated up with 10 DEG C -40 DEG C/h heating rate, solidifying pressure 0.5MPa-0.7MPa, curing time 2h-4h；Cool down later, drops
Warm 20 DEG C -60 DEG C/h of rate is cooled to 60 DEG C hereinafter, solidification is completed；
Prepreg is aramid fiber or glass fiber reinforced epoxy resin base prepreg in the step (one), specifically includes increasing
Strong body and resin, wherein reinforcement uses aramid fabric or glass fabric, and resin uses 130 DEG C of intermediate temperature setting epoxies
Resin or 180 DEG C of High Temperature Curing Epoxy Resin Systems；
In the step (two), micropore is processed by the way of laser drill to composite material face；The step (three)
The middle honeycomb used is Nomex aramid fiber paper honeycomb；In the step (4) glue film using 130 DEG C of solidification medium temperature glue films,
130 DEG C of solidification high temperature glue films or 170 DEG C of solidification high temperature glue films；Foamed glue is using 130 DEG C of solidification medium temperature foamed glues, 130 DEG C of solidifications
High temperature foamed glue or 170 DEG C of solidification high temperature foamed glues；Solidifying pressure is 0.2~0.3MPa, heating speed in the step (five)
Rate is 10 DEG C~40 DEG C/h, rate of temperature fall≤20 DEG C/h.
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| CN108533589B (en) * | 2018-03-19 | 2021-07-30 | 中国南方航空股份有限公司 | Bonding method of metal silencing structure extension glue joint surface |
| CN108516075B (en) * | 2018-03-22 | 2021-07-02 | 镇江市逸帆航空部件有限公司 | Cabin noise reduction isolation plate based on passive flow control and cabin noise reduction method |
| CN110962400A (en) * | 2018-09-30 | 2020-04-07 | 嘉迪声学科技有限公司 | Sound insulation device |
| CN109483962B (en) * | 2018-11-20 | 2020-12-01 | 华侨大学 | Automobile front panel with multi-layer sandwich composite structure and application of structure |
| CN109913139A (en) * | 2019-03-11 | 2019-06-21 | 江苏惠沣环保科技有限公司 | A kind of sound insulation glue film and preparation method thereof |
| CN112208743A (en) * | 2019-07-09 | 2021-01-12 | 中国航发商用航空发动机有限责任公司 | Component end structure, method for producing same, aircraft and aircraft component |
| CN110487533B (en) * | 2019-09-17 | 2021-11-19 | 中国航发沈阳发动机研究所 | Sound lining test piece, assembling method and test structure thereof |
| CN110481061A (en) * | 2019-09-17 | 2019-11-22 | 中国航发沈阳发动机研究所 | A kind of method for punching of fibre reinforced composites, acoustical panel and its sound lining |
| CN110486169B (en) * | 2019-09-17 | 2021-10-01 | 中国航发沈阳发动机研究所 | Sound-absorbing plate and sound lining with same |
| CN110486334B (en) * | 2019-09-17 | 2021-11-19 | 中国航发沈阳发动机研究所 | Sound lining and engine with same |
| CN110815901A (en) * | 2019-10-17 | 2020-02-21 | 成都飞机工业（集团）有限责任公司 | Method for controlling through hole rate of acoustic lining wall plate made of honeycomb sandwich composite material |
| GB201915453D0 (en) | 2019-10-24 | 2019-12-11 | Univ Limerick | Composite materials for damping acoustic vibrations |
| CN110749233A (en) * | 2019-10-28 | 2020-02-04 | 上海机电工程研究所 | Honeycomb adapter and method of manufacture |
| CN110936635B (en) * | 2019-12-05 | 2020-10-30 | 南京航空航天大学 | Composite honeycomb component based on compression molding of flow guiding process and method |
| CN111113957B (en) * | 2019-12-27 | 2021-05-11 | 中国民用航空飞行学院 | Through hole edge packaging method for honeycomb sandwich composite material structural member |
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| CN112976701A (en) * | 2021-03-03 | 2021-06-18 | 北京汽车研究总院有限公司 | Honeycomb panel, manufacturing method thereof, vehicle body panel and vehicle |
| CN113858656A (en) * | 2021-09-24 | 2021-12-31 | 成都佳驰电子科技股份有限公司 | Integrated forming process of sawtooth-shaped hollow-structure composite wave-absorbing component |
| US20230103556A1 (en) * | 2021-10-05 | 2023-04-06 | General Electric Company | Solid adhesive film for acoustic liner and method |
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