IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0413466
(2003-04-15)
|
우선권정보 |
FR-0004801 (2002-04-17) |
발명자
/ 주소 |
- Andre, Robert
- Buge, Michel
- Porte, Alain
- Rambaud, Eric
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
13 인용 특허 :
5 |
초록
▼
A multi-component acoustically resistive layer, for acoustical attenuating panels having a cellular core (1) flanked, on the sound wave arrival side, with an acoustically damping layer (2) and, on the opposite side, with a rear reflector (3), comprises a first structural component (4) in contact wit
A multi-component acoustically resistive layer, for acoustical attenuating panels having a cellular core (1) flanked, on the sound wave arrival side, with an acoustically damping layer (2) and, on the opposite side, with a rear reflector (3), comprises a first structural component (4) in contact with the aerodynamic flow and formed by at least one layer of fibers connected by a suitable resin and oriented in the direction of aerodynamic flow the component (4) comprising a suitable quantity of open surface; a dissipating component (6) disposed against the surface of the first component (4) opposite the flow, formed by a metallic cloth; and a second structural component (7) formed by at least one layer of fibers connected by a suitable resin, oriented orthogonally to the direction of aerodynamic flow. The second structural component (7) is connected to the cellular core (1) and comprises a suitable open surface quantity.
대표청구항
▼
1. Multi-component acoustically resistive layer, for acoustical attenuation panels of the type constituted by a cellular core (1) flanked on the sound wave arrival side, by an acoustically damping layer (2) and, on the opposite side, by a rear reflector (3), characterized in that it is constituted:b
1. Multi-component acoustically resistive layer, for acoustical attenuation panels of the type constituted by a cellular core (1) flanked on the sound wave arrival side, by an acoustically damping layer (2) and, on the opposite side, by a rear reflector (3), characterized in that it is constituted:by a first structural component (4) in contact with the aerodynamic flow informed by at least one layer of fibers connected by a suitable resin and oriented in the direction of aerodynamic flow, said component (4) comprising a suitable open surface quantity; by a dissipating component (6) disposed against the surface of said first component (4) opposite said flow, formed by a metallic cloth; and by a second structural component (7) formed of at least one layer of fibers connected by a suitable resin, oriented orthogonally to said direction of aerodynamic flow, said second structural component (7) being connected to said cellular core (1) and comprising a suitable open surface quantity. 2. Layer according to claim 1, characterized in that the fibers of the first and second structural components (4, 7) are constituted by rovings or unidirectional layers.3. Layer according to claim 1, characterized in that the first and second structural components (4, 7) are constituted by a cloth whose warp or weft filaments are parallel to said direction of aerodynamic flow.4. Layer according to claim 2, characterized in that the fibers are fibers of carbon or glass.5. Layer according to claim 1, characterized in that the fibers of the first structural component (4) are pre-impregnated with a thermoplastic resin.6. Layer according to claim 1, characterized in that the fibers of the second structural component (7) are pre-impregnated with a thermosetting resin.7. Layer according to claim 1, characterized in that the first structural component (4) is pierced with non-circular openings, particularly rectangular openings (5) oriented parallel to said direction of aerodynamic flow.8. Layer according to claim 1, characterized in that the dissipating component (6) is a metallic cloth, particularly of stainless steel.9. Layer according to claim 1, characterized in that the second structural component (7) is constituted by rovings of parallel fibers (9) providing between them a predetermined spacing (8).10. Layer according to claim 1, characterized in that it moreover comprises an intermediate component (10) for reinforcing the first structural component (4), interposed between the dissipating component (6) and the second structural component (7), constituted and disposed in a manner identical to the first structural component (4).11. Layer according to claim 10, characterized in that the first structural component (4) and the intermediate component (10) are constituted by at least one layer of composite material pierced with rectangular openings (5, 11) the openings of the two components (4, 10) facing each other.12. Acoustically attenuating panel comprising at least one clip, constituted by several segments or sectors whose edges are connected by clipping and each provided with an acoustically resistive layer according to claim 1.
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