EP0935235A2 - Paroi du type en sandwich - Google Patents

Paroi du type en sandwich Download PDF

Info

Publication number
EP0935235A2
EP0935235A2 EP99102139A EP99102139A EP0935235A2 EP 0935235 A2 EP0935235 A2 EP 0935235A2 EP 99102139 A EP99102139 A EP 99102139A EP 99102139 A EP99102139 A EP 99102139A EP 0935235 A2 EP0935235 A2 EP 0935235A2
Authority
EP
European Patent Office
Prior art keywords
sandwich wall
fiber composite
cover
wall according
sandwich
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.)
Ceased
Application number
EP99102139A
Other languages
German (de)
English (en)
Other versions
EP0935235A3 (fr
Inventor
Horst Dr. Bansemir
Walter Gembler
Ottmar Haider
Christian Ritzer
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.)
Airbus Helicopters Deutschland GmbH
Original Assignee
Eurocopter Deutschland GmbH
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 Eurocopter Deutschland GmbH filed Critical Eurocopter Deutschland GmbH
Publication of EP0935235A2 publication Critical patent/EP0935235A2/fr
Publication of EP0935235A3 publication Critical patent/EP0935235A3/fr
Ceased legal-status Critical Current

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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
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects

Definitions

  • the invention relates to a sandwich wall, in particular for a Helicopter cell, according to the preamble of claim 1.
  • the object of the invention is a sandwich wall of the aforementioned Art to create a low weight and manufacturing effort effective sound insulation.
  • the cover skin as a fiber composite network combined with a flexible cover film with the inner core consisting of hollow bodies a high grade Sound absorption in the sandwich wall with a variety of each Hollow bodies of the inner core formed individual resonators achieved, and at the same time become the basis weight based on the required strength and rigidity and the manufacturing costs for the sandwich structure, the Fiber composite network with no problem, for example by means of the winding process can produce the required mesh size, kept extremely small, so that the invention of the requirement of helicopter construction for a lightweight structure, in which excellent sound insulation properties with a combine high load resistance, fully complies with.
  • the hollow bodies are particularly preferred Embodiment according to claim 4 different cavity heights.
  • the second cover skin not from a fiber composite network, but as a closed To form fiber composite cover layer, the resulting Weight gain through an increased sound absorption effect Sandwich wall is balanced.
  • this cover skin consists of a closed fiber composite cover layer, as a soundproofing layer, as preferred according to claim 10, a foam layer inserted between the fiber composite cover layer and the inner core be provided.
  • a soundproofing layer a soundproofing film on a forming the second cover skin Fiber composite network applied.
  • the sandwich wall can easily be used as an interior lining or use non-load-bearing partition, however, because of the high constructive strength with low weight according to claim 12 preferably as an integral part of a support structure, in particular a helicopter cell.
  • the cover skins exist primarily for cost reasons preferably from a glass fiber composite.
  • the sandwich wall 2 shown in Fig. 1 contains one by standing upright Hollow body 4 formed, specifically light inner core in the form of a Honeycomb core 6 and two outer fiber composite cover skins glued to the honeycomb core 6 8, 10.
  • the first, the main direction of incidence H of the sound facing cover skin 8 consists of an open-mesh, e.g. in the way of the winding process fiber composite network 12 with depending on the required load strength differently oriented, according to FIG. 1 at 90 ° crossing fiber strands 14, the mesh size of the fiber composite network 12 significantly smaller than the internal cross section of the hollow body 6 is dimensioned.
  • the fiber composite network 12 is on the outside a flexible, thin-walled cover sheet 16, such as under the The designation "Kapton film" is commercially available.
  • the second cover skin 10 on the other hand, consists of a continuous closed fiber composite layer.
  • the cover skins 8, 10 are made of a glass fiber composite and are connected to the honeycomb core 6 in each case via an adhesive film 18, 20.
  • the adhesive via the net mesh aspirated so that the excess glue is removed, which the Basis weight of the finished sandwich wall 2 reduced, but above all ensured is that the mesh of the fiber composite network 12 is not Adhesive residues are added.
  • the individual honeycomb cells 4 of the honeycomb core 6 act in this way together with the fiber composite network 12 and the applied to it Cover film 16 each facing the direction of sound H, on the Cavity resonators closed by the fiber composite layer 10 with an excellent absorption behavior, which according to the selected cavity and mesh size, but also in Depending on the cover film 16 used can be influenced. So lets a narrow-band absorption behavior with a closed cover film 16 with an absorption level of almost 100%, while itself when using a finely perforated or microperforated Cover foil 16 is a less pronounced one in the resonance range, but instead but can achieve significantly broadband sound absorption.
  • Fig. 2 where the components corresponding to the first embodiment are identified by a reference symbol increased by 100, shows a Sandwich wall 102, in contrast to the first embodiment a damping layer 22 made of foam on the side of the closed Fiber composite layer 110 is inserted into the inner core 106.
  • the soundproofing effect of the sandwich wall 102 becomes apparent broadband noise reduction improved. Otherwise, the construction and Operation of the sandwich wall 102 is the same as in the first embodiment.
  • each of the two cover skins 208, 210 consists of a fiber composite network 212, which is covered on the outside with a flexible cover film 216 is.
  • the sandwich wall 202 is therefore in terms of sound incidence Direction of both outer skins 208, 210 designed equally sound-absorbing.
  • the honeycomb core 206 is opposite to the cover skins 208, 210 inclined partition 24 in two parts, so that the Honeycomb cells have different cavity heights and thus the absorption maximum of the individual resonators formed in this way in different, largely uniform over a broad frequency band distributed frequency ranges. Otherwise, the construction and operation sandwich wall 202 is substantially the same as the previous ones Embodiments.
  • the sandwich wall 302 is an integral part integrated in a support structure 26, for example a helicopter cell.
  • the sandwich wall 302 again consists of an inner honeycomb core 306 and two outer, each by a fiber composite network 312 and a cover sheet 316 formed cover skins 308, 310 and is in view of the loads acting as a highly rigid and strong lightweight board.
  • the load-resistant connection of the sandwich wall 302 to the support structure 26 takes place by means of fiber composite Doppler 28.
  • the installation position of the Sandwich wall 302 is chosen so that the top cover 308 the Main sound sources forming helicopter units, that is about Main gearbox is turned.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Building Environments (AREA)
  • Laminated Bodies (AREA)
EP99102139A 1998-02-06 1999-02-03 Paroi du type en sandwich Ceased EP0935235A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19804718A DE19804718C2 (de) 1998-02-06 1998-02-06 Schall absorbierende Sandwichwand
DE19804718 1998-02-06

Publications (2)

Publication Number Publication Date
EP0935235A2 true EP0935235A2 (fr) 1999-08-11
EP0935235A3 EP0935235A3 (fr) 2001-11-14

Family

ID=7856838

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99102139A Ceased EP0935235A3 (fr) 1998-02-06 1999-02-03 Paroi du type en sandwich

Country Status (3)

Country Link
US (1) US6179086B1 (fr)
EP (1) EP0935235A3 (fr)
DE (1) DE19804718C2 (fr)

Cited By (7)

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RU2249258C2 (ru) * 2003-03-27 2005-03-27 Федеральное государственное унитарное предприятие "Научно-исследовательский институт автоматизированных средств производства и контроля" Звукопоглощающая панель
WO2007137607A1 (fr) * 2006-05-30 2007-12-06 Airbus Deutschland Gmbh Élément sandwich destiné au parement intérieur insonorisant de moyens de transport, et plus particulièrement au parement intérieur insonorisant de compartiments de fuselages d'aéronefs.
EP2408665A2 (fr) * 2009-03-17 2012-01-25 Airbus Operations GmbH Structure cellulaire de fuselage de construction hybride pour un avion
EP2610052A1 (fr) * 2011-12-30 2013-07-03 AGUSTAWESTLAND S.p.A. Panneau de garnissage intérieur d'aéronef et aéronef équipé de tels panneaux
CN104755004A (zh) * 2012-06-13 2015-07-01 日东欧洲股份有限公司 蜂窝系高温结构阻尼器
RU2723876C2 (ru) * 2018-12-06 2020-06-17 Сергей Юрьевич Алышев Многослойный композиционный материал
CN113488018A (zh) * 2021-06-07 2021-10-08 哈尔滨工程大学 一种可弯曲折叠的空心玻璃微珠夹层式柔性声反射结构及应用

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WO2007137607A1 (fr) * 2006-05-30 2007-12-06 Airbus Deutschland Gmbh Élément sandwich destiné au parement intérieur insonorisant de moyens de transport, et plus particulièrement au parement intérieur insonorisant de compartiments de fuselages d'aéronefs.
EP2408665A2 (fr) * 2009-03-17 2012-01-25 Airbus Operations GmbH Structure cellulaire de fuselage de construction hybride pour un avion
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WO2013098665A1 (fr) * 2011-12-30 2013-07-04 Agustawestland S.P.A. Panneau de garniture d'intérieur d'aéronef, et aéronef comportant de tels panneaux
CN104185546A (zh) * 2011-12-30 2014-12-03 奥格斯塔韦斯兰股份公司 飞机内部装饰板以及配备有这种板的飞机
CN104185546B (zh) * 2011-12-30 2016-03-16 奥格斯塔韦斯兰股份公司 飞机内部装饰板以及配备有这种板的飞机
RU2607210C2 (ru) * 2011-12-30 2017-01-10 Агустауэстлэнд С.П.А. Панель для отделки интерьера воздушного судна и воздушное судно, отделанное такими панелями
EP2610052A1 (fr) * 2011-12-30 2013-07-03 AGUSTAWESTLAND S.p.A. Panneau de garnissage intérieur d'aéronef et aéronef équipé de tels panneaux
CN104755004A (zh) * 2012-06-13 2015-07-01 日东欧洲股份有限公司 蜂窝系高温结构阻尼器
RU2723876C2 (ru) * 2018-12-06 2020-06-17 Сергей Юрьевич Алышев Многослойный композиционный материал
CN113488018A (zh) * 2021-06-07 2021-10-08 哈尔滨工程大学 一种可弯曲折叠的空心玻璃微珠夹层式柔性声反射结构及应用
CN113488018B (zh) * 2021-06-07 2022-08-09 哈尔滨工程大学 一种可弯曲折叠的空心玻璃微珠夹层式柔性声反射结构及应用

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DE19804718C2 (de) 2001-09-13
US6179086B1 (en) 2001-01-30
EP0935235A3 (fr) 2001-11-14
DE19804718A1 (de) 1999-08-19

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