Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B64—AIRCRAFT; AVIATION; COSMONAUTICS
  • B64C—AEROPLANES; HELICOPTERS
  • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
  • B64C1/40—Sound or heat insulation, e.g. using insulation blankets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B64—AIRCRAFT; AVIATION; COSMONAUTICS
  • B64C—AEROPLANES; HELICOPTERS
  • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
  • B64C1/06—Frames; Stringers; Longerons ; Fuselage sections
  • B64C1/066—Interior liners

Definitions

• the present invention relates to an aircraft interior panel, and, more particularly to an aircraft interior panel with noise attenuation properties.
• Aircraft components such as overhead stowage compartments, seats, lavatories, galleys, lighting systems, etc. are all required to function within strictly confined spaces.
• a panel assembly that includes a first panel having an inner surface and an outer surface, and a second panel having an inner surface and an outer surface.
• the second panel includes a plurality of rib members formed therein that extend inwardly.
• the rib members include an inner surface and an outer surface.
• a plurality of panel portions are defined between the plurality of rib members.
• the panel portions include an inner surface and an outer surface.
• the inner surface of the rib members are secured to the inner surface of the first panel, and the inner surface of the panel portions is spaced apart from the inner surface of the first panel to define at least first and second cavities.
• the panel assembly includes a first acoustic treatment member positioned in the first cavity.
• the first acoustic treatment member is adhered to at least one of the inner surface of the first panel or the inner surface of the second panel.
• a space is defined between the first acoustic treatment member and one of the inner surface of the first panel or the inner surface of the second panel.
• the first acoustic treatment member is comprised of at least first and second layers.
• the first acoustic treatment member is adhered to the inner surface of the second panel, and the second panel includes a plurality of raised portions defined therein.
• the panel assembly includes a second acoustic treatment member.
• the first acoustic treatment member is adhered to the inner surface of the first panel and the second acoustic treatment member is adhered to the inner surface of the outer panel, and a space is defined between the first and second acoustic treatment members.
• the second cavity defines a ducting space and the does not include an acoustic treatment member therein.
• the panel assembly includes an outer acoustic treatment member adhered to at least a portion of the outer surface of the second panel and a decorative panel adhered to the outer surface of the first panel member.
• an aircraft fuselage wall that includes a plurality of frame members and a panel assembly that includes a first panel having an inner surface and an outer surface, and a second panel having an inner surface and an outer surface.
• the second panel includes a plurality of rib members formed therein that extend inwardly and each define an outer rib cavity.
• the rib members include an inner surface and an outer surface.
• a plurality of panel portions are defined between the plurality of rib members.
• the panel portions include an inner surface and an outer surface.
• the inner surface of the rib members are secured to the inner surface of the first panel, and the inner surfaces of the panel portions are spaced apart from the inner surface of the first panel to define at least first and second cavities. At least some of the frame members are received in at least some of the outer rib cavities.
• the present invention includes no fill and fare, e.g., bondo, (however, in another embodiment, fill and fare can be implemented).
• the present invention can provide an approximately 8-10% reduction in noise transmission compared to the prior art (however, this range is only exemplary and is not a limitation).
• the production process is energy efficient and preferably uses reusable and recyclable material.
• the panels provide zero to little water absorption, a favorable surface finish, approximately sixty second press time and overwrap decor with flam compliance.
• the panels can be made of materials such as Ultem and glass fiber composite, thermoformed material in a preferred embodiment. The panels can be crushed into a large variety of shapes with integrated acoustic treatments.
• the panel assembly includes two (inner and outer) panels bonded together.
• the inner panel has a smooth cross section and the outer panel has a corrugated cross section.
• the outer panel provides stiffness to the panel assembly with incorporated standoff ribs.
• the inner and outer panels can also be made of other materials such as phenolic (e.g., crush core honeycomb panels or layup laminates).
• the cavity between the inner and outer panel includes acoustic treatments, such as one or more layers of the same or different materials that provide an acoustic barrier.
• the cavity includes a multiple layer treatment.
• the layers of the treatment are comprised of materials mat have different acoustic impedances. Therefore, when noise is propagating therethrough, at each interlace between different materials layers, there is a reduction in the efficiency of sound propagation producing a reduction in sound level.
• another acoustic treatment can be positioned on the outside of the corrugated outer panel for added acoustic performance.
• FIG. 1 is a perspective view of a panel assembly in accordance with an
• FIG.2 is an exploded perspective view of the panel assembly of FIG. 1 ;
• FIG. 3 is a perspective view of an end of the panel assembly of FIG. 1 ;
• FIG.4 is a cross-sectional view of the panel assembly of FIG. 1 ;
• FIG. 5 is a perspective view of the panel assembly of FIG. 1 incorporated into the wall of an aircraft;
• FIG. 6 is a cross-sectional view taken along line 6—6 of FIG. 5.
• FIGS. 1-6 show a panel assembly 10 for use in the wall 100 of a vehicle, such as an aircraft.
• the invention is contemplated for use on commercial passenger aircraft.
• this is not a limitation on the present invention and the panel assembly can be used elsewhere.
• the panel assembly 10 includes a first panel 12 having an inner surface 12a and an outer surface 12b and a second panel 14 having an inner surface 14a and an outer surface 14b.
• the first panel is the inner panel and the second panel is the outer panel.
• the second panel 14 is corrugated to form a plurality of rib members 16 and a plurality of panel portions 18.
• the inner and outer surfaces of the rib members and panel portions are the same as the inner and outer surfaces of the outer panel.
• the rib members 16 include inner surface 16a and outer surface 16b and the panel portions 18 include inner surface 18a and outer surface 18b.
• the second panel 14 includes a plurality of the rib members 16 formed therein that extend inwardly and that each define an outer rib cavity 20.
• the inner surface 16a of the rib members 16 are secured to the inner surface 12a of the first panel 12. This can be accomplished by any method known in the art, such as gluing, adhering, affixing, securing with fasteners, welding, etc.
• an acoustic treatment member or layer or the like can be positioned between the inner surface 16a of the rib members 16 and the inner surface 12a of the first panel 12. This is within the scope of "securing" within the present invention.
• each panel portion 18a is spaced apart from the inner surface of the first panel 12a to define a plurality of cavities 22.
• the cavities 22 include acoustic treatment members 24 are positioned therein.
• the acoustic treatment members 24 are comprised of materials that are known to reduce noise travel therethrough.
• the acoustic treatment members 24 can be comprised of any combination (in various layers) of the following materials types: Nomex felt or another acoustic felt, such as MC8-4596 from TexTech Industries; skin damping material, such as ADC-006 from EAR Specially Composites, K10S0 or FR0540U from Damping Technologies, Inc.; rubber or vinyl acoustic sheets, such as Isodamp C-1002 from EAR Specialty Composites. None of these materials are limiting and the acoustic treatment members can be made of any material with acoustic damping properties known in the art
• the acoustic treatment members 24 include a number of layers of different materials.
• the acoustic treatment members 24 include layers 26 and 28 of different materials having different thicknesses.
• the acoustic treatment members 24 can be adhered to one or both of the inner
• the acoustic treatment members 24 can fill the entire cavity 22 or space between the panel portion 18 and the first panel 12 or, a space 30 can be defined between the acoustic treatment member 24 and the first panel 12 or the second panel 14.
• the second panel 14 includes a plurality of raised portions 32 defined therein. The raised portions 32 provide air pockets 34 that further reduce noise propagation.
• the panel assembly 10 also includes an outer acoustic treatment member 36 that is adhered to the outer surface 14b of the second panel 14.
• the panel assembly 10 can also include a decorative panel 38 or other layers adhered to or positioned adjacent the outer surface 12b of the first panel member 12.
• FIGS. 5-6 show a plurality of panel assemblies 10 installed within the wall 100 of an aircraft fuselage.
• the wall 100 includes frame members 102. As shown in FIG. 5, in a preferred embodiment, some of the frame members 102 are received in some of the outer rib cavities 22. FIG. 6 shows how the rib members 16 abut the window of an aircraft.
• some of the cavities 22 can define ducting space 40 and can be used to route systems, wire harnesses, air ducting, etc.
• the ducting space 40 can be coincident with space 30 in cavities 22 that include acoustic treatment members 24 therein or the ducting space 40 can be defined in cavities 22 that do not include any acoustic treatment members 24 therein, as shown in FIG. S.
• the ducting space 40 can be used to reduce the use of traditional ducting within the aircraft.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Aviation & Aerospace Engineering (AREA)
• Soundproofing, Sound Blocking, And Sound Damping (AREA)

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Publications (2)

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ID=49877652

Family Applications (1)

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Citations (4)

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• 2013
  • 2013-07-08 BR BR112015000215A patent/BR112015000215A2/pt active Search and Examination
  • 2013-07-08 JP JP2015520715A patent/JP5986313B2/ja active Active
  • 2013-07-08 US US13/936,546 patent/US8931592B2/en active Active
  • 2013-07-08 CA CA2878487A patent/CA2878487C/en not_active Expired - Fee Related
  • 2013-07-08 WO PCT/US2013/049597 patent/WO2014008507A2/en not_active Ceased
  • 2013-07-08 EP EP16184874.2A patent/EP3112257B1/en active Active
  • 2013-07-08 EP EP13812870.7A patent/EP2870066B1/en active Active
  • 2013-07-08 RU RU2015103863/11A patent/RU2593733C1/ru active
  • 2013-07-08 CN CN201380039884.5A patent/CN104507797B/zh active Active
• 2015
  • 2015-01-05 US US14/589,906 patent/US9174722B2/en active Active
• 2016
  • 2016-04-01 JP JP2016073958A patent/JP6077697B2/ja active Active

Patent Citations (4)

Non-Patent Citations (1)

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