EP0658872A2 - Dispositif d'absorption à résonance - Google Patents

Dispositif d'absorption à résonance Download PDF

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Publication number
EP0658872A2
EP0658872A2 EP94117490A EP94117490A EP0658872A2 EP 0658872 A2 EP0658872 A2 EP 0658872A2 EP 94117490 A EP94117490 A EP 94117490A EP 94117490 A EP94117490 A EP 94117490A EP 0658872 A2 EP0658872 A2 EP 0658872A2
Authority
EP
European Patent Office
Prior art keywords
tongues
resonance
tongue
absorber according
double
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Withdrawn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
EP94117490A
Other languages
German (de)
English (en)
Other versions
EP0658872A3 (fr
Inventor
Klaus Ermert
Arno Röder
Klaus Zimmermann
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 Defence and Space GmbH
Original Assignee
Daimler Benz Aerospace AG
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 Daimler Benz Aerospace AG filed Critical Daimler Benz Aerospace AG
Publication of EP0658872A2 publication Critical patent/EP0658872A2/fr
Publication of EP0658872A3 publication Critical patent/EP0658872A3/fr
Withdrawn legal-status Critical Current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 resonance absorber for damping structure-borne noise with a number of freely vibrating tongues with different resonance frequencies, the tongues being arranged on a common base which can be connected to a body to be damped.
  • Resonance absorbers of the type mentioned above are e.g. known from DE 1 071 364 or DE-OS 2 163 798. With these vibration absorbers, the individual tongues are matched to the vibrations of the body to be damped with regard to their resonance frequency. The tongues thus excited to resonate vibrations thus withdraw vibration energy from the body to be damped, which energy is ultimately converted into heat by suitable damping of the tongues.
  • the object of the present invention is to provide a resonance absorber of the above. To create a type that allows a more compact design with the same effect, can be tuned to the widest possible frequency range and manages with smaller amounts of damping material than before.
  • the vibration absorber according to the invention has on the one hand free-swinging tongues, which are designed as double tongues, but which are not vibrationally coupled to adjacent double tongues and thus show a defined vibration behavior.
  • a technology is used to increase the damping of a double tongue, which is known per se as a "constrained coating" for damping bending vibrations of thin sheets.
  • the damping layer is not deformed by compression or relaxation, but by shear, so that the damping layers can be extremely thin.
  • the tongues can either be side by side, e.g. be arranged according to DE 2 163 798 or one above the other, e.g. corresponding to DE 1 071 364 or EP 0 020 284 B1.
  • a particularly compact manner several layers with a congruent outer circumference are stacked one above the other, so that a block of free-floating double tongues is arranged in rows and columns.
  • the resonance absorber shown in the figure consists of seven layers (1 to 7) of double tongues (1.1, 1.2, 1.3 ...), each layer being made of two congruent metal plates of the same thickness.
  • the plates are cut in a comb-like manner on two opposite sides A and B, a base strip of width b running obliquely over the plate surface remaining uncut.
  • congruent spacers 10 to 15 are inserted between the individual layers, via which the individual plates are acoustically coupled in the area of the base strips, the layers and the spacers by a base plate 8 and a so-called adapter plate 9 by means of clamping screws 9.1 to 9.7 are held together.
  • the spacers can also be integrated directly with the plates, in particular in the production of large numbers of absorbers, for example by means of appropriate casting molds for the plates or by embossing or milling of flat plates.
  • the resonance absorber becomes connected in a force-locking and torque-locking manner to a body to be damped via the base plate 8.
  • a damping layer is applied between the two plates of a layer (1 to 7) before stacking and cutting, so that a sandwich-like structure is created.
  • double tongues 1.1, 1.2, ... 1.7 are formed, each consisting of two metallic tongue elements, e.g. 1.11 and 1.12, with the covering sandwiched in between, e.g. 1.13.
  • the base strip runs asymmetrically across the plate level, 2 x 7 double tongues are created per layer, each with a different length and thus a different resonance frequency.
  • the layer thickness of the individual plate elements increases from layer to layer (from 1 to 7), the number of tongues with different resonance frequencies is multiplied by the number of layers.
  • the coupling factor varies between the values 1 and 2 depending on the material. With a very soft damping mass, the natural frequency of the double tongue increases only insignificantly; with a very hard damping mass, the coupling factor 2 is almost obtained, i.e. a frequency doubling.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Vibration Prevention Devices (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
EP94117490A 1993-12-16 1994-11-05 Dispositif d'absorption à résonance. Withdrawn EP0658872A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4343008 1993-12-16
DE4343008A DE4343008C2 (de) 1993-12-16 1993-12-16 Resonanzabsorber

Publications (2)

Publication Number Publication Date
EP0658872A2 true EP0658872A2 (fr) 1995-06-21
EP0658872A3 EP0658872A3 (fr) 1996-02-07

Family

ID=6505236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94117490A Withdrawn EP0658872A3 (fr) 1993-12-16 1994-11-05 Dispositif d'absorption à résonance.

Country Status (6)

Country Link
US (1) US5550335A (fr)
EP (1) EP0658872A3 (fr)
JP (1) JPH07210171A (fr)
CA (1) CA2137954A1 (fr)
DE (1) DE4343008C2 (fr)
NO (1) NO311470B1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5901231A (en) * 1995-09-25 1999-05-04 Noise Cancellation Technologies, Inc. Piezo speaker for improved passenger cabin audio systems
US6006874A (en) * 1997-03-03 1999-12-28 Johnson; Bruce H. Mechanical energy absorber
DE19832266C2 (de) * 1998-07-17 2000-06-21 Schrey & Veit Gmbh Einspannvorrichtung für Schienenräder und entsprechendes Einspannverfahren
US6279679B1 (en) * 1998-12-29 2001-08-28 Leonard N. Thomasen Selectively tuned vibration absorber
US6173805B1 (en) * 1999-02-22 2001-01-16 Tekna Sonic, Inc. Variably tuned vibration absorber
KR100460781B1 (ko) * 2001-08-29 2004-12-09 엘지.필립스디스플레이(주) 개선된 댐퍼를 가지는 컬러 음극선관
DE102004027551B4 (de) * 2004-06-04 2006-06-01 J. Wagner Gmbh Spritzpistole
US7210555B2 (en) * 2004-06-30 2007-05-01 Halliburton Energy Services, Inc. Low frequency acoustic attenuator for use in downhole applications
US7296654B1 (en) * 2004-09-29 2007-11-20 United States Of America As Represented By The Secretary Of The Army Tunable stacked plate vibration isolator
US7270215B2 (en) * 2005-04-15 2007-09-18 Step Technologies Inc. Loudspeaker enclosure with damping material laminated within internal shearing brace
WO2008101452A1 (fr) * 2007-02-21 2008-08-28 Fachhochschule Dortmund Résonateur à large bande pour réduire les vibrations et le bruit de pièces excitées par vibrations, notamment de pièces techniques
US7828113B1 (en) * 2007-04-02 2010-11-09 Kim Dao Methods and apparatus for controlling vibration of enclosures, particularly loudspeaker enclosures
DE102008017418B4 (de) 2008-04-03 2010-08-19 Gottfried Wilhelm Leibniz Universität Hannover Vorrichtung zur Reduzierung der Übertragung und Ausbreitung von Schall und/oder Wellenbewegungen in einer Flüssigkeit
DE102010038720A1 (de) 2010-07-30 2012-02-02 Günther Veit Schwingungsabsorber zur Dämpfung mechanischer Schwingungen
EP3230536B1 (fr) 2014-12-08 2022-04-27 Zephyros Inc. Revêtement de sol fibreux à chevauchement vertical
DE102016118589A1 (de) * 2016-09-30 2018-04-05 Phoncoat Gmbh Schallschutzhaube für Musiker und Büroangestellte

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR925745A (fr) * 1946-04-17 1947-09-11 Philips Nv Perfectionnements aux organes vibrants et objets soumis à des vibrations
DE2163798A1 (de) * 1971-12-22 1973-07-05 Messerschmitt Boelkow Blohm Resonanzabsorber fuer periodische und aperiodische schwingungen
DE2906169A1 (de) * 1979-02-17 1980-08-21 Krupp Ag Huettenwerke Verwendung eines schwingungsgedaempften rades zur erhoehung der haftung zwischen schiene und rad bei einem schienenfahrzeug
US4339018A (en) * 1978-10-27 1982-07-13 Lord Corporation Sound absorbing structure
US4353586A (en) * 1977-05-06 1982-10-12 Fried. Krupp Huttenwerke Ag Vibration damped railway wheel
US4355578A (en) * 1978-04-17 1982-10-26 Fried. Krupp Huttenwerke Ag Railway wheels and rails damping structures
DE3119499A1 (de) * 1981-05-15 1982-12-16 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Koerperschalldaempfer
US4716986A (en) * 1985-10-07 1988-01-05 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Vibration damping system
US4924976A (en) * 1987-09-04 1990-05-15 Digital Equipment Corporation Tuned array vibration absorber
EP0452370A1 (fr) * 1988-12-30 1991-10-23 Limbach & Limbach Systeme amortisseur en materiau visco-elastique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327812A (en) * 1965-10-14 1967-06-27 B J Lazan Damping means
DE2835020C2 (de) * 1978-08-10 1983-10-20 Krupp Stahl Ag, 4630 Bochum Schwingungsdämpfer
DE2922585B1 (de) * 1979-06-02 1980-12-11 Krupp Ag Huettenwerke Schwingungsabsorber fuer Resonanzschwingungen rotierender Koerper
US4627635A (en) * 1983-09-20 1986-12-09 Koleda Michael T Vibration damping units and vibration damped products
US5240221A (en) * 1988-06-03 1993-08-31 Delta Tech Research, Inc. Viscoelastic damping system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR925745A (fr) * 1946-04-17 1947-09-11 Philips Nv Perfectionnements aux organes vibrants et objets soumis à des vibrations
DE2163798A1 (de) * 1971-12-22 1973-07-05 Messerschmitt Boelkow Blohm Resonanzabsorber fuer periodische und aperiodische schwingungen
US4353586A (en) * 1977-05-06 1982-10-12 Fried. Krupp Huttenwerke Ag Vibration damped railway wheel
US4355578A (en) * 1978-04-17 1982-10-26 Fried. Krupp Huttenwerke Ag Railway wheels and rails damping structures
US4339018A (en) * 1978-10-27 1982-07-13 Lord Corporation Sound absorbing structure
DE2906169A1 (de) * 1979-02-17 1980-08-21 Krupp Ag Huettenwerke Verwendung eines schwingungsgedaempften rades zur erhoehung der haftung zwischen schiene und rad bei einem schienenfahrzeug
DE3119499A1 (de) * 1981-05-15 1982-12-16 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Koerperschalldaempfer
US4716986A (en) * 1985-10-07 1988-01-05 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Vibration damping system
US4924976A (en) * 1987-09-04 1990-05-15 Digital Equipment Corporation Tuned array vibration absorber
EP0452370A1 (fr) * 1988-12-30 1991-10-23 Limbach & Limbach Systeme amortisseur en materiau visco-elastique

Also Published As

Publication number Publication date
US5550335A (en) 1996-08-27
DE4343008C2 (de) 1997-03-06
EP0658872A3 (fr) 1996-02-07
NO944870D0 (no) 1994-12-15
JPH07210171A (ja) 1995-08-11
CA2137954A1 (fr) 1995-06-17
DE4343008C1 (de) 1995-01-12
NO311470B1 (no) 2001-11-26
NO944870L (no) 1995-06-19

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