US20090145688A1 - Acoustic attenuation device - Google Patents

Acoustic attenuation device Download PDF

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Publication number
US20090145688A1
US20090145688A1 US12/276,481 US27648108A US2009145688A1 US 20090145688 A1 US20090145688 A1 US 20090145688A1 US 27648108 A US27648108 A US 27648108A US 2009145688 A1 US2009145688 A1 US 2009145688A1
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US
United States
Prior art keywords
lining
downstream
upstream
filtering
hollow body
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.)
Abandoned
Application number
US12/276,481
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English (en)
Inventor
Serge Marcoux
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.)
SNCF Mobilites
Original Assignee
SNCF Mobilites
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 SNCF Mobilites filed Critical SNCF Mobilites
Priority to US12/276,481 priority Critical patent/US20090145688A1/en
Assigned to SOCIETE NATIONALE DES CHEMINS DE FER FRANCAIS SNCF reassignment SOCIETE NATIONALE DES CHEMINS DE FER FRANCAIS SNCF ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MARCOUX, SERGE
Assigned to SOCIETE NATIONALE DES CHEMINS DE FER FRANCAIS SNCF reassignment SOCIETE NATIONALE DES CHEMINS DE FER FRANCAIS SNCF CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE'S ADDRESS AND INCORRECT DOC DATE PREVIOUSLY RECORDED ON REEL 022310 FRAME 0794. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: MARCOUX, SERGE
Publication of US20090145688A1 publication Critical patent/US20090145688A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/002—Air treatment devices
    • B60T17/008—Silencer devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses
    • B60T17/043—Brake line couplings, air hoses and stopcocks
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/027—Throttle passages
    • F16L55/02745—Throttle passages by passing through a mass of particles or a porous member
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/027—Throttle passages
    • F16L55/02754—Throttle passages using a central core throttling the passage
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers
    • F16L55/0331—Noise absorbers by inserting an elongated element in the pipe
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers
    • F16L55/0332—Noise absorbers by inserting a body of compressible material in the pipe

Definitions

  • the present invention relates to an acoustic attenuation device designed to be connected to a compressed air outlet.
  • the verification of the braking circuit of a train involves several steps performed by at least one operator. First of all, the operator checks the correct operation of each brake shoe, then a complete purging of the air pipe of the braking circuit is carried out in order to verify its continuity. Given that the pressure of the air in these pipes can reach as much as 9 bar, the intensity of the noise generated reaches around 121 dB near to the compressed air outlet. This value is close to the pain threshold and repeated exposure could lead to a hearing handicap for the operator. It is not therefore acceptable to expose an operator performing this type of check to such a sound intensity.
  • An acoustic attenuation device comprising an elongated hollow body designed to be connected to a compressed air outlet via a first open end fitted with a coupling head and having air exhaust openings arranged radially within a wall of the tube close to a second closed end.
  • the acoustic attenuation is obtained by disposing inside the hollow body a knitted stainless steel cloth lining rolled-up on itself and forming a buffer filtering the air. The effect of this is that the air flowing through the lining follows different paths, which slows the propagation and the development of low- and high-pressure regions that generate the noise.
  • Such a device allows the intensity of the noise to be reduced from 120 dB to about 78 dB at the outlet of the compressed air pipe for an air pipe under a pressure of around 5 bar. This value of 78 dB may still be judged to be too high by the operators and it is desirable to reduce it. It should however be noted that a check by an operator requires a minimum noise level to be conserved in order for the depressurization to remain audible.
  • a standard dictates that the intensity of the noise of the air outlet from the pipe should not be below 70 dB.
  • such a device reduces the speed of the air at the outlet and it is not desirable to prolong the time required for a total purging of the pipe too much. The same standard previously mentioned thus dictated that a reservoir of 600 L of air at 5 bar should be able to be purged until the final pressure reaches 0.4 bar in less than about one minute.
  • the goal of the present invention is to provide an improved device meeting the requirements of the standard while, at the same time, providing an enhanced acoustic attenuation, and for that purpose it consists of an acoustic attenuation device comprising an elongated hollow body having an open upstream end taking the form of a head for coupling to a compressed air outlet, and a closed downstream end, said hollow body having a sidewall with a plurality of air exhaust openings arranged in the downstream part, characterized in that the hollow body contains at least one upstream buffer lining forming a longitudinal filter and at least one downstream filtering lining forming a sheath.
  • the upstream lining is formed by rolling up on itself a filtering mesh formed of a suitable material.
  • the upstream lining takes the form of a compartment containing lining elements formed from a loosely packed suitable material.
  • the materials used for the upstream lining could notably be based on stainless steel, synthetic materials or composites.
  • a knitted stainless steel cloth will be used, rolled up on itself or loosely packed, since this material is particularly satisfactorily resistant to the longitudinal compression that the flow of compressed air causes.
  • the downstream lining is disposed around an open mandrel designed to hold it.
  • the open mandrel could, for example, be formed by a spring of round-section wire, thus allowing its resistance to the air intended to flow through the device according to the invention to be reduced.
  • the downstream lining is formed by winding of at least one band of at least one suitable material around the mandrel.
  • the downstream lining is composed of at least one sheath formed of a suitable filtering material surrounded by a retaining jacket under tension.
  • the filtering sheath and the retaining jacket under tension are formed from bands of the same width wound one over the other around the mandrel.
  • the band designed to form the retaining jacket under tension has a greater length than the filtering band.
  • the band designed to form the retaining jacket under tension is wound once around the mandrel before winding it with the filtering band.
  • the retaining jacket under tension is made of stainless steel cloth.
  • the downstream lining comprises at least one composite material.
  • the composite material is a non-woven fiber glass material. This material is particularly recognized for its acoustic insulation properties.
  • a multi-perforated washer is disposed at the inlet of the upstream lining.
  • the flow of air passing through the device is more efficiently distributed over the whole cross-section of the upstream lining.
  • a centrally-perforated washer is disposed between the upstream lining and the downstream lining.
  • the flow of air is channeled at the outlet of the upstream lining and centered on the axis of the tube of the downstream lining.
  • the present invention is not limited to a device with two linings and that it is perfectly possible to dispose several linings forming a buffer and/or several linings forming a sheath.
  • FIG. 1 is a schematic longitudinal cross-sectional representation of an acoustic device according to the invention.
  • FIG. 2 is a cross-sectional view along the line II-II in FIG. 1 .
  • FIG. 3 is a cross-sectional view along the line III-III in FIG. 1 .
  • FIG. 4 is a cross-sectional view along the line IV-IV in FIG. 1 .
  • FIG. 5 is a cross-sectional view along the line V-V in FIG. 1 .
  • FIG. 6 is a representation of the disposition of two layers of materials before winding around a mandrel.
  • An acoustic attenuation device such as is shown in cross section in FIG. 1 , comprises an elongated hollow body 1 formed from a cylindrical tube 2 , a coupling head 4 and a base 5 .
  • the tube 2 has air exhaust openings 6 arranged radially in a sidewall 9 of the downstream part.
  • the tube 2 is preferably made of a material that is light but capable of resisting high pressures. This material could, for example, be a composite material molded under vacuum then fired.
  • the sidewall 9 of the tube 2 comprises on its upstream part an anti-slip coating so as to facilitate handling and maneuvering of the device.
  • the coupling head 4 is designed to allow the connection of the device onto a compressed air outlet (not shown) of a conduit of a braking circuit of a train, and has corresponding standard dimensions. Furthermore, the coupling head 4 comprises a fixing lug 10 allowing the device to be suspended from a belt for example.
  • the coupling head 4 generally made from gray cast steel, could advantageously be made from a lighter material, such as cast aluminum.
  • the coupling head 4 is rigidly fixed, for example by bonding, into the upstream end 7 of the tube 2 .
  • the lining of the tube 2 is installed.
  • the latter firstly comprises a multi-perforated washer 11 having a diameter substantially equal to the diameter of the tube 2 , such as is shown in FIG. 2 , pushing up against the coupling head 4 and against which an upstream lining 12 forming a buffer presses, as shown in FIG. 3 .
  • This upstream lining 12 is formed, for example, from a knitted stainless steel cloth rolled up on itself.
  • upstream lining 12 may furthermore be formed using materials taken in the form of a filtering mesh or loosely packed in a compartment, one wall of which may be formed by the multi-perforated washer 11 .
  • the upstream lining 12 is closed by a centrally-perforated washer 13 having a diameter substantially equal to the diameter of the tube 2 , such as is shown in FIG. 4 , and pushing against the upstream lining 12 .
  • This centrally-perforated washer 13 is followed by a filtering downstream lining 14 forming a sheath, shown in FIG. 5 . It should be noted that the centrally-perforated washer 13 could form a second wall of the compartment in the case where the upstream lining 12 is formed from loosely packed elements.
  • the downstream lining 14 is disposed around an open mandrel 15 formed by a spring of round-section wire and designed to be used as a support for the materials forming the downstream lining 14 .
  • the use of a round-section wire spring allows a minimal resistance to be offered to the air passing through it.
  • the downstream lining 14 comprises, on the one hand, a retaining jacket under tension formed from a band of stainless steel cloth 16 and, on the other hand, a band of composite material 17 , for example non-woven fiber glass.
  • the band of stainless steel cloth 16 and the band of composite material 17 are wound together around the open mandrel 15 . Such a winding process results in alternating layers of stainless steel cloth 16 and of composite material 17 .
  • the fibers are thus held by the stainless steel cloth 16 and the composite material 17 will not be degraded by the effect of the passage of compressed air.
  • Each layer of stainless steel cloth 16 thus forms a pressure-retaining sheath surrounding a layer of filtering material.
  • the band of stainless steel cloth 16 and the band of composite material 17 have identical widths and are wound together around the mandrel 15 .
  • the band of stainless steel cloth 16 is longer than the band of composite material 17 , the difference in length corresponding to a first turn of the band of stainless steel cloth 16 around the mandrel 15 .
  • the disposition of the two bands before winding is shown in FIG. 6 .
  • the exhaust openings 6 in the downstream part of the tube 2 are distributed along the downstream lining 14 . More precisely, the tube 2 has three circular regions each comprising four exhaust openings 6 uniformly distributed around the circumference of the tube 2 .
  • the base 5 is then thermo-bonded to the tube 2 at a downstream end 8 so as to close off said downstream end 8 .
  • the base 5 will advantageously be made of cast aluminum owing to the pressure forces to which it will be subjected. It should however be noted that the tube 2 and the base 5 may be formed as a single component, the lining then being introduced into the tube 2 via the upstream end that is subsequently closed off by the coupling head 4 .
  • the operator connects the device to the air outlet that he wishes to monitor by means of the coupling head 4 .
  • the stop-valve is then opened and the purging of the pipe started.
  • the compressed air flows through the coupling head 4 then enters at high speed into the whole assembly of the hollow body 1 .
  • This air firstly flows through the multi-perforated washer 11 which divides it into a plurality of flow streams distributed over the whole cross section of the tube 2 before penetrating into the inside of the upstream lining 12 which it crosses longitudinally.
  • the air flow passes through the centrally-perforated washer 13 which channels this air flow inside the sheath formed by the downstream lining 14 .
  • the air flows radially through the open mandrel 15 and the downstream lining 14 before exiting from the device via the exhaust openings 6 .
  • the invention is not limited to a single lining forming a buffer and that it is of course possible to provide a plurality of stages of each type, buffer or sheath.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Exhaust Silencers (AREA)
US12/276,481 2005-04-12 2008-11-24 Acoustic attenuation device Abandoned US20090145688A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/276,481 US20090145688A1 (en) 2005-04-12 2008-11-24 Acoustic attenuation device

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR0503602A FR2884293B1 (fr) 2005-04-12 2005-04-12 Dispositif d'attenuation acoustique
FR05.03602 2005-04-12
PCT/FR2006/000724 WO2006108946A1 (fr) 2005-04-12 2006-04-03 Dispositif d’attenuation acoustique
US91129407A 2007-10-11 2007-10-11
US12/276,481 US20090145688A1 (en) 2005-04-12 2008-11-24 Acoustic attenuation device

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
PCT/FR2006/000724 Continuation WO2006108946A1 (fr) 2005-04-12 2006-04-03 Dispositif d’attenuation acoustique
US11911294 Continuation 2006-04-03

Publications (1)

Publication Number Publication Date
US20090145688A1 true US20090145688A1 (en) 2009-06-11

Family

ID=35276608

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/276,481 Abandoned US20090145688A1 (en) 2005-04-12 2008-11-24 Acoustic attenuation device

Country Status (8)

Country Link
US (1) US20090145688A1 (fr)
EP (1) EP1886058B1 (fr)
CN (1) CN100593661C (fr)
DK (1) DK1886058T3 (fr)
ES (1) ES2464446T3 (fr)
FR (1) FR2884293B1 (fr)
PL (1) PL1886058T3 (fr)
WO (1) WO2006108946A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120206011A1 (en) * 2011-02-15 2012-08-16 Westinghouse Electric Company Noise and vibration mitigation system for nuclear reactors employing an acoustic side branch resonator
WO2015095192A3 (fr) * 2013-12-17 2015-10-15 Adbm Corp. Système de réduction de bruit sous-marin utilisant un ensemble résonateur à extrémité ouverte et appareil de déploiement
US9343059B2 (en) 2013-09-24 2016-05-17 Board Of Regents, The University Of Texas System Underwater noise abatement panel and resonator structure
US9618151B2 (en) 2015-02-26 2017-04-11 Adriaan DeVilliers Compact modular low resistance broadband acoustic silencer
US10520187B2 (en) 2017-07-06 2019-12-31 Praxair Technology, Inc. Burner with baffle
WO2023099678A1 (fr) * 2021-12-02 2023-06-08 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Élément d'accouplement pour un système de freinage d'un véhicule ferroviaire, système de freinage comprenant ledit élément d'accouplement et véhicule ferroviaire équipé dudit système de freinage
US11812221B2 (en) 2020-01-21 2023-11-07 Adbm Corp. System and method for simultaneously attenuating high-frequency sounds and amplifying low-frequency sounds produced by underwater acoustic pressure source
US11815198B2 (en) 2018-11-27 2023-11-14 Smith & Burgess Process Safety Consulting Resonator for a pressurized fluid system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3038961B1 (fr) * 2015-07-16 2018-06-15 Sncf Mobilites Dispositif d'attenuation acoustique et organe de connexion pour sortie d'air sous pression d'un vehicule ferroviaire
CN106285837A (zh) * 2016-11-02 2017-01-04 苏州工业园区职业技术学院 一种降噪减排的单缸柴油机消声器及其制备方法

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US1844104A (en) * 1929-05-08 1932-02-09 Burgess Lab Inc C F Exhaust muffler
US2056608A (en) * 1933-12-22 1936-10-06 C F Burges Lab Inc Silencer
US2600236A (en) * 1948-11-16 1952-06-10 Esther Larsen Muffler with a plurality of passages
US3209857A (en) * 1964-02-12 1965-10-05 Oliver C Eckel Silencer with freely movable limp diaphragm
US3960239A (en) * 1973-08-15 1976-06-01 Barry Wright Corporation Noise-reducing fluid-flow devices
US4316523A (en) * 1980-06-04 1982-02-23 Boretti Napoleon P Silencer for gas discharge devices
US4932495A (en) * 1988-11-25 1990-06-12 Chapman Dewey R Vocal sound muffling device
US5166479A (en) * 1988-03-11 1992-11-24 Bertin & Cie Silencer for a gas flow
US6053276A (en) * 1998-06-09 2000-04-25 D'amico, Jr.; John Muffler packing method with injection of cartrided continuous filament fiberglass
US6109387A (en) * 1999-07-19 2000-08-29 Boretti; Napoleon P. Silencer for gas discharge devices
US6209678B1 (en) * 1998-01-13 2001-04-03 Robert E. Sterling Pneumatic hand tool exhaust muffler
US20020079161A1 (en) * 2000-12-22 2002-06-27 Curtice Morgan M. Muffler insert
US6672425B1 (en) * 2002-07-24 2004-01-06 Onyx Industrial Services, Inc. Noise abatement module

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EP0011189B1 (fr) * 1978-11-17 1982-03-24 KNECHT Filterwerke GmbH Dispositif utilisant une membrane pour l'amortissement des pulsations dans des courants de liquides
DE2904529A1 (de) * 1979-02-07 1980-08-14 Graubremse Gmbh Mit einer abblasoeffnung versehenes luftventil fuer eine druckluftanlage
DE2922677C2 (de) * 1979-06-02 1982-12-09 Wabco Fahrzeugbremsen Gmbh, 3000 Hannover Geräuschdämpfer für Ventileinrichtungen in Druckluftbremsanlagen
FR2566092B1 (fr) * 1984-06-18 1986-10-24 Vibrasonic Dispositif de commande d'ecoulement de fluide a faible niveau de bruit

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1844104A (en) * 1929-05-08 1932-02-09 Burgess Lab Inc C F Exhaust muffler
US2056608A (en) * 1933-12-22 1936-10-06 C F Burges Lab Inc Silencer
US2600236A (en) * 1948-11-16 1952-06-10 Esther Larsen Muffler with a plurality of passages
US3209857A (en) * 1964-02-12 1965-10-05 Oliver C Eckel Silencer with freely movable limp diaphragm
US3960239A (en) * 1973-08-15 1976-06-01 Barry Wright Corporation Noise-reducing fluid-flow devices
US4316523A (en) * 1980-06-04 1982-02-23 Boretti Napoleon P Silencer for gas discharge devices
US5166479A (en) * 1988-03-11 1992-11-24 Bertin & Cie Silencer for a gas flow
US4932495A (en) * 1988-11-25 1990-06-12 Chapman Dewey R Vocal sound muffling device
US6209678B1 (en) * 1998-01-13 2001-04-03 Robert E. Sterling Pneumatic hand tool exhaust muffler
US6053276A (en) * 1998-06-09 2000-04-25 D'amico, Jr.; John Muffler packing method with injection of cartrided continuous filament fiberglass
US6109387A (en) * 1999-07-19 2000-08-29 Boretti; Napoleon P. Silencer for gas discharge devices
US20020079161A1 (en) * 2000-12-22 2002-06-27 Curtice Morgan M. Muffler insert
US6672425B1 (en) * 2002-07-24 2004-01-06 Onyx Industrial Services, Inc. Noise abatement module

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2676276A4 (fr) * 2011-02-15 2015-11-18 Westinghouse Electric Corp Système d'atténuation du bruit et des vibrations pour réacteurs nucléaires, utilisant un résonateur acoustique en dérivation
US8393437B2 (en) * 2011-02-15 2013-03-12 Westinghouse Electric Company Llc Noise and vibration mitigation system for nuclear reactors employing an acoustic side branch resonator
EP2676276A1 (fr) * 2011-02-15 2013-12-25 Westinghouse Electric Company LLC Système d'atténuation du bruit et des vibrations pour réacteurs nucléaires, utilisant un résonateur acoustique en dérivation
KR20140004176A (ko) * 2011-02-15 2014-01-10 웨스팅하우스 일렉트릭 컴퍼니 엘엘씨 음향 사이드 브랜치 공진기를 이용한 원자로의 잡음 및 진동 저감 시스템
US20120206011A1 (en) * 2011-02-15 2012-08-16 Westinghouse Electric Company Noise and vibration mitigation system for nuclear reactors employing an acoustic side branch resonator
US9343059B2 (en) 2013-09-24 2016-05-17 Board Of Regents, The University Of Texas System Underwater noise abatement panel and resonator structure
US9607601B2 (en) 2013-09-24 2017-03-28 Board of Regents, The Univesity Systems Underwater noise abatement panel and resonator structure
WO2015095192A3 (fr) * 2013-12-17 2015-10-15 Adbm Corp. Système de réduction de bruit sous-marin utilisant un ensemble résonateur à extrémité ouverte et appareil de déploiement
US9410403B2 (en) 2013-12-17 2016-08-09 Adbm Corp. Underwater noise reduction system using open-ended resonator assembly and deployment apparatus
US9618151B2 (en) 2015-02-26 2017-04-11 Adriaan DeVilliers Compact modular low resistance broadband acoustic silencer
US10520187B2 (en) 2017-07-06 2019-12-31 Praxair Technology, Inc. Burner with baffle
US11815198B2 (en) 2018-11-27 2023-11-14 Smith & Burgess Process Safety Consulting Resonator for a pressurized fluid system
US11812221B2 (en) 2020-01-21 2023-11-07 Adbm Corp. System and method for simultaneously attenuating high-frequency sounds and amplifying low-frequency sounds produced by underwater acoustic pressure source
WO2023099678A1 (fr) * 2021-12-02 2023-06-08 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Élément d'accouplement pour un système de freinage d'un véhicule ferroviaire, système de freinage comprenant ledit élément d'accouplement et véhicule ferroviaire équipé dudit système de freinage

Also Published As

Publication number Publication date
ES2464446T3 (es) 2014-06-02
PL1886058T3 (pl) 2014-08-29
WO2006108946A1 (fr) 2006-10-19
EP1886058A1 (fr) 2008-02-13
CN101156019A (zh) 2008-04-02
EP1886058B1 (fr) 2014-03-12
FR2884293A1 (fr) 2006-10-13
CN100593661C (zh) 2010-03-10
FR2884293B1 (fr) 2007-05-18
DK1886058T3 (da) 2014-06-23

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