EP0586452A1 - Panneau attenuant le bruit - Google Patents

Panneau attenuant le bruit

Info

Publication number
EP0586452A1
EP0586452A1 EP92910627A EP92910627A EP0586452A1 EP 0586452 A1 EP0586452 A1 EP 0586452A1 EP 92910627 A EP92910627 A EP 92910627A EP 92910627 A EP92910627 A EP 92910627A EP 0586452 A1 EP0586452 A1 EP 0586452A1
Authority
EP
European Patent Office
Prior art keywords
component part
cellular
front face
panel according
cells
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP92910627A
Other languages
German (de)
English (en)
Inventor
Robert Samuel Wilson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Short Brothers PLC
Original Assignee
Short Brothers PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Short Brothers PLC filed Critical Short Brothers PLC
Publication of EP0586452A1 publication Critical patent/EP0586452A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/165—Particles in a matrix
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/285—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/42—Layered products comprising a layer of synthetic resin comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/026—Porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/24—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2371/00—Polyethers, e.g. PEEK, i.e. polyether-etherketone; PEK, i.e. polyetherketone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00—Walls, panels

Definitions

  • a structural cellular component for a noise attenuation panel comprising wall portions which provide bounding surfaces for an array of cells and which terminate at opposite faces of the component, with the wall portions or predetermined ones of the wall portions forming the cells extending to at least one of the faces of the component at an angle or angles inclined to that face.
  • the component is formed from an open celled rigid or flexible plastic foam which provides cells of the predetermined first and second cell sizes and/or densities for the frontal region and base region of the component.
  • the frontal region is produced by powder sintering the thermoplastics material.
  • Fig 7 is a schematic isometric view from above of a noise attenuation panel according to a seventh embodiment of the invention
  • Fig 9 is a schematic cross section of part of a noise attenuation panel according to a ninth embodiment of the invention.
  • the panel 10 is of arcuate form, possibly of double curvature, and is embodied as a structural part of a duct of a nose cowl of a turbofan aero engine, the panel 10 being one of several arcuate panels disposed just upstream of the fan of the engine.
  • the structure will usually include supporting channel members of which only one member 17 is shown in Fig 2.
  • the panel 10 is secured to the member 17 by bonding to an outer face of a flange

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Casings For Electric Apparatus (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Connection Or Junction Boxes (AREA)

Abstract

Panneau (10) atténuant le bruit comprenant un élément présentant une partie avant destinée à être exposée au bruit devant être atténué, cette partie avant étant constituée ou comprenant une zone avant renforcée qui comprend la partie avant et qui est réalisée dans un matériau composite perméable et poreux formé à partir d'un matériau matriciel thermoplastique renforcé par un ou plusieurs matériaux de renforcement non thermoplastiques. La zone avant est de préférence produite par frittage du matériau composite à partir de poudre. Les matériaux de renforcement peuvent se présenter sous forme de particules discrètes, et comprennent une poudre, des microsphères ou des microballons, ou bien encore ils peuvent se présenter sous forme de fibres qui peuvent être discontinues, ou de fibres à filament continu. La zone avant renforcée peut prendre la forme d'un élément constitutif qui fait face au panneau comprenant un élément constitutif de base comportant un réseau de cellules. Dans un autre mode d'exécution, le composant comprend une structure à cellules ouvertes qui inclut la zone avant.
EP92910627A 1991-05-30 1992-05-27 Panneau attenuant le bruit Withdrawn EP0586452A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9111621 1991-05-30
GB919111621A GB9111621D0 (en) 1991-05-30 1991-05-30 Noise attenuation panel

Publications (1)

Publication Number Publication Date
EP0586452A1 true EP0586452A1 (fr) 1994-03-16

Family

ID=10695801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92910627A Withdrawn EP0586452A1 (fr) 1991-05-30 1992-05-27 Panneau attenuant le bruit

Country Status (8)

Country Link
EP (1) EP0586452A1 (fr)
JP (1) JPH06508935A (fr)
AU (1) AU1762592A (fr)
BR (1) BR9205581A (fr)
CA (1) CA2095919A1 (fr)
GB (2) GB9111621D0 (fr)
IL (1) IL102049A0 (fr)
WO (1) WO1992022053A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2739888B2 (ja) * 1994-10-24 1998-04-15 正幸 今井 酸素濃縮器
FR2775216B1 (fr) * 1998-02-26 2000-07-13 Snecma Panneau insonorisant et procede de realisation
GB0119608D0 (en) * 2001-08-11 2001-10-03 Rolls Royce Plc A guide vane assembly
JP4754836B2 (ja) * 2005-01-27 2011-08-24 株式会社神戸製鋼所 二重壁構造体
US7434659B2 (en) * 2005-04-04 2008-10-14 Hexcel Corporation Acoustic septum cap honeycomb
US8815038B2 (en) 2008-10-01 2014-08-26 The Boeing Company Joining curved composite sandwich panels
US8834667B2 (en) 2010-10-19 2014-09-16 The Boeing Company Method for joining sandwich truss core panels and composite structures produced therefrom
US8607924B2 (en) * 2011-09-08 2013-12-17 Hexcel Corporation Anchoring of septums in acoustic honeycomb
US8651233B2 (en) 2012-05-08 2014-02-18 Hexcel Corporation Acoustic structure with increased bandwidth suppression
GB2512869B (en) * 2013-04-09 2021-07-21 Upm Kymmene Corp A composite having acoustic properties, manufacturing the composite, a component comprising a composite, manufacturing the component and uses thereof
GB2539228B (en) * 2015-06-10 2017-07-26 Fergusson's Advanced Composite Tech Ltd A method of making a composite structure
WO2021116889A1 (fr) * 2019-12-12 2021-06-17 3M Innovative Properties Company Procédés de fabrication de panneaux double couche insonorisants comprenant une partie centrale constituée de cellules reliées, certaines des parois de cellule comportant des ouvertures
WO2021116888A1 (fr) * 2019-12-12 2021-06-17 3M Innovative Properties Company Panneaux à double couche absorbant les sons comprenant une partie centrale constituée de cellules reliées, certaines des parois de cellule comportant des ouvertures
EP4144649A1 (fr) * 2021-09-07 2023-03-08 Lilium eAircraft GmbH Moteur de ventilateur carénée comprenant un revêtement acoustique
EP4411726A1 (fr) * 2023-01-31 2024-08-07 Airbus SAS Structure alvéolaire d'un panneau d atténuation acoustique comprenant au moins une cloison configurée pour vibrer à une fréquence souhaitée, procédé de fabrication de ladite structure alvéolaire
US12428165B2 (en) 2023-06-05 2025-09-30 Rohr, Inc. Nacelle inlet structure with foam core

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2981360A (en) * 1954-02-18 1961-04-25 Bayer Ag Sound-absorbing systems
US3821999A (en) * 1972-09-05 1974-07-02 Mc Donnell Douglas Corp Acoustic liner
JPS5073734A (fr) * 1973-11-05 1975-06-18
SE420629C (sv) * 1979-11-19 1985-09-30 Larsson Jan E Ljuddempande matta och sett for dess framstellning
JPS57178855A (en) * 1981-04-30 1982-11-04 Nissan Motor Acoustic board
GB2130963B (en) * 1982-11-30 1986-03-19 Rolls Royce Manufacturing damped resonator acoustical panel
FR2562699B1 (fr) * 1984-04-09 1986-12-05 Alsthom Atlantique Revetement de paroi absorbant les ondes acoustiques
GB8817669D0 (en) * 1988-07-25 1988-09-01 Short Brothers Ltd Means for attenuating sound energy
JP2646140B2 (ja) * 1989-11-21 1997-08-25 株式会社ペトカ 炭素繊維複合体およびその製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9222053A1 *

Also Published As

Publication number Publication date
JPH06508935A (ja) 1994-10-06
WO1992022053A1 (fr) 1992-12-10
BR9205581A (pt) 1994-09-27
GB9111621D0 (en) 1991-07-24
GB2256395A (en) 1992-12-09
IL102049A0 (en) 1992-12-30
GB2256395B (en) 1995-07-05
AU1762592A (en) 1993-01-08
CA2095919A1 (fr) 1992-12-01
GB9211223D0 (en) 1992-07-08

Similar Documents

Publication Publication Date Title
US5414232A (en) Noise attenuation panel
EP0352993B1 (fr) Panneau amortissant le bruit
EP0586452A1 (fr) Panneau attenuant le bruit
CA2064755C (fr) Element structural composite
CA2092410A1 (fr) Element alveole pour panneaux insonorisants
US6607625B2 (en) Process for the production of an acoustively resistive layer, resistive layer thus obtained, and wall using such layer
CN107068143B (zh) 弯曲式声学蜂窝结构的拼接
GB2252076A (en) Noise attenuation panel
EP2833356B1 (fr) Panneau acoustique
US5041323A (en) Honeycomb noise attenuation structure
US20010017232A1 (en) Aircraft engine acoustic liner and method of making the same
AU1170892A (en) Noise attenuation panel
US4434201A (en) Porous panel
JPH10205352A (ja) エンジンカバー
Schmitz et al. Boundary layer control device for duct silencers

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19930507

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR IT NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19961203