EP2071561A3 - Structure absorbante pour l'atténuation de bruits générés notamment par un rotor et carénage comportant une telle structure - Google Patents

Structure absorbante pour l'atténuation de bruits générés notamment par un rotor et carénage comportant une telle structure Download PDF

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Publication number
EP2071561A3
EP2071561A3 EP08020965.3A EP08020965A EP2071561A3 EP 2071561 A3 EP2071561 A3 EP 2071561A3 EP 08020965 A EP08020965 A EP 08020965A EP 2071561 A3 EP2071561 A3 EP 2071561A3
Authority
EP
European Patent Office
Prior art keywords
reducing
fairing
rotor
acoustic waves
waves emitted
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.)
Granted
Application number
EP08020965.3A
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German (de)
English (en)
Other versions
EP2071561B1 (fr
EP2071561A2 (fr
Inventor
Henri-James Marze
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 SAS
Original Assignee
Airbus Helicopters SAS
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Filing date
Publication date
Application filed by Airbus Helicopters SAS filed Critical Airbus Helicopters SAS
Publication of EP2071561A2 publication Critical patent/EP2071561A2/fr
Publication of EP2071561A3 publication Critical patent/EP2071561A3/fr
Application granted granted Critical
Publication of EP2071561B1 publication Critical patent/EP2071561B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Building Environments (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

La présente invention concerne une structure absorbante pour réduire la propagation d'ondes acoustiques émises par dispositifs bruyant du genre rotors ou moteurs, comportant une cloison rigide (1), au moins une paroi poreuse (4) et des moyens de séparation (2) pour disposer la paroi poreuse (4) à une distance déterminée de la cloison rigide (1), en délimitant des cavités (3) d'une hauteur h1 entre ladite paroi poreuse (4) et ladite cloison rigide (1), ladite hauteur h1 étant déterminée pour obtenir une absorption maximale d'une fréquence donnée des ondes acoustiques émises, caractérisé en ce qu'elle comporte des moyens d'absorption complémentaires pour obtenir une absorption maximale d'au moins une fréquence supplémentaire, des ondes acoustiques émises.
EP08020965.3A 2007-12-14 2008-12-03 Structure absorbante pour l'atténuation de bruits générés notamment par un rotor et carénage comportant une telle structure Active EP2071561B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0708699A FR2925208B1 (fr) 2007-12-14 2007-12-14 Structure absorbante pour l'attenuation de bruits generes notamment par un rotor et carenage comportant une telle structure

Publications (3)

Publication Number Publication Date
EP2071561A2 EP2071561A2 (fr) 2009-06-17
EP2071561A3 true EP2071561A3 (fr) 2017-05-17
EP2071561B1 EP2071561B1 (fr) 2021-02-03

Family

ID=39691154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08020965.3A Active EP2071561B1 (fr) 2007-12-14 2008-12-03 Structure absorbante pour l'atténuation de bruits générés notamment par un rotor et carénage comportant une telle structure

Country Status (6)

Country Link
US (1) US7779965B2 (fr)
EP (1) EP2071561B1 (fr)
JP (1) JP2009145891A (fr)
CN (1) CN101458926B (fr)
CA (1) CA2646933C (fr)
FR (1) FR2925208B1 (fr)

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* Cited by examiner, † Cited by third party
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US7913813B1 (en) * 2009-10-21 2011-03-29 The Boeing Company Noise shield for a launch vehicle
US8770343B2 (en) * 2011-11-23 2014-07-08 The Boeing Company Noise reduction system for composite structures
GB201209658D0 (en) * 2012-05-31 2012-07-11 Rolls Royce Plc Acoustic panel
EP2706009B1 (fr) 2012-09-07 2016-04-27 AIRBUS HELICOPTERS DEUTSCHLAND GmbH Empennage d'un hélicoptère
JP5787947B2 (ja) * 2013-08-09 2015-09-30 三菱電機株式会社 防音装置、エレベータ用巻上機及びエレベータ
US8997923B2 (en) * 2013-08-12 2015-04-07 Hexcel Corporation Sound wave guide for use in acoustic structures
EP2878433B1 (fr) 2013-11-29 2016-04-20 AIRBUS HELICOPTERS DEUTSCHLAND GmbH Ensemble rotatif caréné de composite segmenté pour aéronef et procédé pour sa fabrication
EP2913270B1 (fr) * 2014-02-28 2016-02-24 AIRBUS HELICOPTERS DEUTSCHLAND GmbH Giravion avec au moins un rotor principal et au moins un rotor anti-couple
EP2913271A1 (fr) * 2014-02-28 2015-09-02 AIRBUS HELICOPTERS DEUTSCHLAND GmbH Giravion avec au moins un rotor principal et au moins un rotor anti-couple
EP2913269B1 (fr) * 2014-02-28 2019-01-16 AIRBUS HELICOPTERS DEUTSCHLAND GmbH Giravion avec au moins un rotor principal et au moins un rotor anti-couple
AU2016267963B2 (en) * 2015-05-25 2020-08-13 Dotterel Technologies Limited A shroud for an aircraft
CN105620716A (zh) * 2016-03-07 2016-06-01 刘海涛 载人多旋翼飞行器隔音方法
FR3054608B1 (fr) * 2016-07-29 2020-06-26 Safran Panneau acoustique pour une turbomachine et son procede de fabrication
JP7006083B2 (ja) * 2017-09-26 2022-01-24 富士フイルムビジネスイノベーション株式会社 騒音低減構造及び画像形成装置
CN108791868A (zh) * 2018-07-31 2018-11-13 刘浩然 一种安全稳定的新型运输无人机
JP7398742B2 (ja) 2020-06-09 2023-12-15 戸田建設株式会社 伝搬音抑制構造及び管内伝搬音抑制構造
CN113674727A (zh) * 2021-08-05 2021-11-19 北京市劳动保护科学研究所 深亚波长低频吸声结构及吸声单元

Citations (6)

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FR2482663A1 (fr) * 1980-05-17 1981-11-20 Rolls Royce Revetement d'isolation acoustique a couches multiples
FR2674362A1 (fr) * 1991-03-18 1992-09-25 Grumman Aerospace Corp Isolant d'attenuation acoustique a resistance segmentee.
DE29512787U1 (de) * 1995-08-09 1995-10-12 Dürr Metalltechnik, 72116 Mössingen Lärmschutzeinrichtung, insbesondere für Straßenränder und Untertunnelungen
US6114652A (en) * 1998-09-10 2000-09-05 Northrop Grumman Corporation Method of forming acoustic attenuation chambers using laser processing of multi-layered polymer films
EP1111584A1 (fr) * 1999-12-24 2001-06-27 Eads Airbus SA Procédé de réalisation d'une couche acoustiquement résistive pour paroi acoustique
US20060219477A1 (en) * 2005-04-04 2006-10-05 Earl Ayle Acoustic septum cap honeycomb

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USRE22595E (en) * 1945-01-23 Aircraft
US3191851A (en) * 1963-12-31 1965-06-29 Westinghouse Electric Corp Centrifugal fans
GB2059341B (en) * 1979-09-17 1983-06-08 Rohr Industries Inc Double layer attenuation panel
US4384634A (en) * 1979-12-18 1983-05-24 United Technologies Corporation Sound absorbing structure
JPS57196708A (en) * 1981-05-26 1982-12-02 Mitsubishi Heavy Ind Ltd Reducing apparatus for so2
JPS63116197A (ja) * 1986-11-04 1988-05-20 川口　寛 多孔質構造体およびその製造方法
JP2785687B2 (ja) * 1994-05-02 1998-08-13 ヤマハ株式会社 吸音構造体
FR2719551B1 (fr) * 1994-05-04 1996-07-12 Eurocopter France Dispositif anti-couple à rotor et stator redresseur carénés, et à aubes redresseuses inclinées.
US5782082A (en) * 1996-06-13 1998-07-21 The Boeing Company Aircraft engine acoustic liner
US6144652A (en) * 1996-11-08 2000-11-07 Lucent Technologies Inc. TDM-based fixed wireless loop system
DE19804718C2 (de) * 1998-02-06 2001-09-13 Eurocopter Deutschland Schall absorbierende Sandwichwand
CN2440872Y (zh) * 2000-08-30 2001-08-01 彭奇琨 无机玻璃钢夹芯板
FR2815603B1 (fr) * 2000-10-20 2003-02-21 Eurocopter France Panneau insonorisant, en particulier panneau structural ou d'habillage d'un aeronef a voilure tournante
FR2817994B1 (fr) 2000-12-08 2003-02-28 Eads Airbus Sa Panneau acoustique sandwich
SE525812C2 (sv) * 2002-06-12 2005-05-03 Saab Ab Akustiskt foder, användning av ett foder samt sätt att framställa ett akustiskt foder
JP2005313835A (ja) * 2004-04-30 2005-11-10 Toyoda Gosei Co Ltd 車両用衝撃吸収体
DE602005017793D1 (de) * 2004-07-16 2009-12-31 Bell Helicopter Textron Inc Gegendrehmomentvorrichtung für hubschrauber
JP4747589B2 (ja) * 2005-01-31 2011-08-17 トヨタ自動車株式会社 吸音装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482663A1 (fr) * 1980-05-17 1981-11-20 Rolls Royce Revetement d'isolation acoustique a couches multiples
FR2674362A1 (fr) * 1991-03-18 1992-09-25 Grumman Aerospace Corp Isolant d'attenuation acoustique a resistance segmentee.
DE29512787U1 (de) * 1995-08-09 1995-10-12 Dürr Metalltechnik, 72116 Mössingen Lärmschutzeinrichtung, insbesondere für Straßenränder und Untertunnelungen
US6114652A (en) * 1998-09-10 2000-09-05 Northrop Grumman Corporation Method of forming acoustic attenuation chambers using laser processing of multi-layered polymer films
EP1111584A1 (fr) * 1999-12-24 2001-06-27 Eads Airbus SA Procédé de réalisation d'une couche acoustiquement résistive pour paroi acoustique
US20060219477A1 (en) * 2005-04-04 2006-10-05 Earl Ayle Acoustic septum cap honeycomb

Also Published As

Publication number Publication date
US20090152395A1 (en) 2009-06-18
JP2009145891A (ja) 2009-07-02
CN101458926B (zh) 2012-07-04
EP2071561B1 (fr) 2021-02-03
FR2925208A1 (fr) 2009-06-19
CN101458926A (zh) 2009-06-17
CA2646933A1 (fr) 2009-06-14
US7779965B2 (en) 2010-08-24
CA2646933C (fr) 2013-05-21
FR2925208B1 (fr) 2016-07-01
EP2071561A2 (fr) 2009-06-17

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