CA2615590A1 - Sound absorbing element and method for producing a sound absorbing element - Google Patents

Sound absorbing element and method for producing a sound absorbing element Download PDF

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Publication number
CA2615590A1
CA2615590A1 CA002615590A CA2615590A CA2615590A1 CA 2615590 A1 CA2615590 A1 CA 2615590A1 CA 002615590 A CA002615590 A CA 002615590A CA 2615590 A CA2615590 A CA 2615590A CA 2615590 A1 CA2615590 A1 CA 2615590A1
Authority
CA
Canada
Prior art keywords
wall area
sound absorbing
spring elements
absorbing element
spring
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
CA002615590A
Other languages
French (fr)
Other versions
CA2615590C (en
Inventor
Klaus Boock
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 Operations GmbH
Original Assignee
Airbus Deutschland Gmbh
Klaus Boock
Airbus Operations 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 Airbus Deutschland Gmbh, Klaus Boock, Airbus Operations Gmbh filed Critical Airbus Deutschland Gmbh
Publication of CA2615590A1 publication Critical patent/CA2615590A1/en
Application granted granted Critical
Publication of CA2615590C publication Critical patent/CA2615590C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
    • F16F3/02—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
    • E04B2001/8428—Tray or frame type panels or blocks, with or without acoustical filling containing specially shaped acoustical bodies, e.g. funnels, egg-crates, fanfolds
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
    • E04B2001/8442—Tray type elements
    • E04B2001/8447—Tray type elements with two facing trays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
    • F16F2228/08—Functional characteristics, e.g. variability, frequency-dependence pre-stressed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4957—Sound device making

Abstract

The present invention relates to a sound absorbing element (1), to a method for producing such a sound absorbing element (1), as well as to an aircraft in which at least one component is designed in the form of such a sound absorbing element (1). The sound absorbing element (1) according to the invention comprises a first wall area (2), a second wall area (3) as well as a plurality of spring elements (4). In this arrangement the first wall area (2) and the second wall area (3) are arranged so as to be spaced apart by a clear space (7), in which the plurality of spring elements (4) are arranged which connect the first wall area (2) and the second wall area (3) to each other. In order to achieve the best possible decoupling of the first wall area (2) from the second wall area (3) the spring elements (4) are pre-tensioned.

Claims (10)

1. A sound absorbing element (1) comprising:
a first wall area (2);
a second wall area (3); and a plurality of spring elements (4);
wherein the first wall area (2) and the second wall area (3) are arranged so as to be spaced apart from each other by a clear space (7), in which clear space (7) the plurality of spring elements (4) are arranged which connect the first wall area (2) and the second wall area (3) to each other, and wherein each individual spring element of the plurality of spring elements (4) is pre-tensioned for decoupling the first wall area (2) from the second wall area (3);, wherein negative pressure is applied to the clear space (7), as a result of which the plurality of spring elements (4) are pre-tensioned.
2. The sound absorbing element of claim 1, wherein each individual one of the plurality of spring elements (4) has a spring characteristic F(x) at least in part with a decreasing region.
3. The sound absorbing element of claim 1 or 2, wherein each individual one of the plurality of spring elements (4) has a spring characteristic F(x) with at least one region in which the gradient ~F/~x approaches zero.
4. The sound absorbing element of claim 3, wherein the plurality of spring elements (4) are pre-tensioned up to a region in which the value of the gradient ~F / ~x is less than 5% of the maximum value of the gradient ~F / ~x in the entire region of the spring characteristic F(x).
5. The sound absorbing element of any one of the preceding claims, wherein the plurality of spring elements (4) are formed as saucer springs.
6. The sound absorbing element of any one of the preceding claims, further comprising:
- a sealing element (5) that borders the first wall area (2) and the second wall area (3) and that seals the clear space (7) from the atmosphere.
7. A method for producing a double-shell sound absorbing element, comprising the steps of:
- connecting a first wall area (2) to a second wall area (3) by way of a plurality of spring elements (4) so that the first wall area (2) and the second wall area (3) are arranged spaced apart from each other by a clear space (7);
- pre-tensioning the plurality of spring elements (4) so that the first wall area (2) and the second wall area (3) are dynamically decoupled;
wherein pre-tensioning of the plurality of spring elements (4) takes place in that negative pressure is applied to the clear space (7).
8. The production method of claim 7, with the further step of:
- sealing the clear space (7) off from the atmosphere with a sealing element (5) that borders the first wall area and the second wall area.
9. The production method of claim 7, wherein the plurality of spring elements (4) are pre-tensioned up to a region in which the value of their spring constant is less than 5% of their maximum spring constant.
10. An aircraft comprising at least one component of the group of components consisting of an ice protection shield and a fuselage skin, of which at least one is designed as a sound absorbing element of one of claims 1 to 6.
CA2615590A 2005-09-26 2006-09-22 Sound absorbing element and method for producing a sound absorbing element Expired - Fee Related CA2615590C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US72064005P 2005-09-26 2005-09-26
DE102005045844.0 2005-09-26
US60/720,640 2005-09-26
DE102005045844A DE102005045844B3 (en) 2005-09-26 2005-09-26 Sound insulation panel for aircraft has inner and outer wall faces separated by evacuated gap with preloaded springs between faces
PCT/EP2006/009254 WO2007039153A1 (en) 2005-09-26 2006-09-22 Sound absorbing element and method for producing a sound absorbing element

Publications (2)

Publication Number Publication Date
CA2615590A1 true CA2615590A1 (en) 2007-04-12
CA2615590C CA2615590C (en) 2011-10-25

Family

ID=37650601

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2615590A Expired - Fee Related CA2615590C (en) 2005-09-26 2006-09-22 Sound absorbing element and method for producing a sound absorbing element

Country Status (9)

Country Link
US (1) US7717228B2 (en)
EP (1) EP1928735B1 (en)
JP (1) JP5180080B2 (en)
CN (1) CN100572194C (en)
BR (1) BRPI0615458A2 (en)
CA (1) CA2615590C (en)
DE (1) DE102005045844B3 (en)
RU (1) RU2414384C2 (en)
WO (1) WO2007039153A1 (en)

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WO2016174544A1 (en) * 2015-04-29 2016-11-03 Bombardier Inc. Acoustic abatement apparatus for an aicraft

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WO2010020268A1 (en) * 2008-08-19 2010-02-25 Siemens Aktiengesellschaft Noise-reducing device and method for reducing noise
KR101295886B1 (en) * 2009-12-15 2013-08-12 한국전자통신연구원 Structure for acoustic load reduction
EP3065129B1 (en) * 2015-03-02 2018-10-03 Siemens Aktiengesellschaft Assembly for reducing the noise emissions of a transformer or a throttle
EP3384176B1 (en) * 2015-12-03 2021-11-24 Viasat, Inc. Vibration isolation apparatuses for crystal oscillators
US10460714B1 (en) 2016-02-05 2019-10-29 United States Of America As Represented By The Administrator Of National Aeronautics And Space Administration Broadband acoustic absorbers
CN110159686A (en) * 2018-02-12 2019-08-23 孙立刚 A kind of multipurpose vibration and noise reducing damping mat
CN110853610B (en) * 2019-11-14 2024-02-13 哈尔滨工程大学 Underwater sound insulation structure unit

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US10723435B2 (en) 2015-04-29 2020-07-28 Bombardier Inc. Acoustic abatement apparatus for an aircraft

Also Published As

Publication number Publication date
BRPI0615458A2 (en) 2011-05-17
CN101272949A (en) 2008-09-24
WO2007039153A1 (en) 2007-04-12
DE102005045844B3 (en) 2007-02-01
EP1928735A1 (en) 2008-06-11
RU2008116157A (en) 2009-11-10
US7717228B2 (en) 2010-05-18
EP1928735B1 (en) 2011-11-09
JP5180080B2 (en) 2013-04-10
JP2009510494A (en) 2009-03-12
CA2615590C (en) 2011-10-25
CN100572194C (en) 2009-12-23
US20080196968A1 (en) 2008-08-21
RU2414384C2 (en) 2011-03-20

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Effective date: 20180924