WO2005078196A1 - Profile en metal leger a tole de fond integree pour realiser une arete de diffraction acoustiquement optimisee - Google Patents

Profile en metal leger a tole de fond integree pour realiser une arete de diffraction acoustiquement optimisee Download PDF

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Publication number
WO2005078196A1
WO2005078196A1 PCT/EP2005/000901 EP2005000901W WO2005078196A1 WO 2005078196 A1 WO2005078196 A1 WO 2005078196A1 EP 2005000901 W EP2005000901 W EP 2005000901W WO 2005078196 A1 WO2005078196 A1 WO 2005078196A1
Authority
WO
WIPO (PCT)
Prior art keywords
attachment
wall
sound
soundproofing wall
sheets
Prior art date
Application number
PCT/EP2005/000901
Other languages
German (de)
English (en)
Inventor
Andreas Wächter
Armin Berndl
Original Assignee
Db Netz Ag
Metallindustriewerk Staaken 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 Db Netz Ag, Metallindustriewerk Staaken Gmbh filed Critical Db Netz Ag
Publication of WO2005078196A1 publication Critical patent/WO2005078196A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0094—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic constructions for generation of phase shifting
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
    • E01F8/0052—Grate-style, e.g. as wall facing
    • 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 an embodiment of a soundproof wall according to the preamble of the main claim for use in the area of rail and road.
  • noise protection walls have been used for the insulation of noises, which arise in particular from rail traffic and road traffic.
  • the effect of the noise barrier is based on an interruption of the direct sound path from the sound generator to the sound receiver, especially residents.
  • the soundproof wall must be made so high that sound waves deflected around the upper edge of the soundproof wall cannot reach a sound receiver that is close to the sound generator.
  • a soundproofing wall according to the state of the art has to be made so high that it covers both the sound generator and also an area above the sound generator.
  • the disadvantage of soundproof walls is therefore that they not only interrupt sound paths but also reduce line of sight across railways or streets and additionally reduce the incidence of light in adjacent properties and buildings. Especially for residents whose buildings are close to a railroad or a street, a noise protection wall can lead to considerable impairments in the quality of life.
  • DE 195 09 678 describes, as a solution to this problem, a soundproof wall with an attachment in the form of a resonator, which makes it possible to reduce the visibility-reducing heights of soundproof walls.
  • the main improvement of the effect of a soundproofing wall is achieved by attaching a sound-absorbing construction in the form of cavity resonators to the upper edge of the soundproofing wall.
  • the length of the resonance spaces of the individual cavity resonators is matched to the spectrum of the noises to be reduced.
  • Cavity resonators are known from several classic experiments and are described in the literature in particular under the term Helmholz resonator, "Kundt's tube” or “Quincke's resonance tube” described.
  • the absorption frequency f of the attachment is only tuned to one tone, ie the attachment has a narrow band.
  • the cavity resonators In order to be able to insulate noises from a wide frequency spectrum, the cavity resonators must have different heights corresponding to the width of the sound spectrum.
  • the tones of low frequency are damped by cavity resonators with high height h and the tones of high frequency by those with low height h. It is immaterial whether the cavity resonators with different heights are arranged arbitrarily within the composite or are arranged in the order of their height.
  • the attachment has elongated, adjacent cavity resonators which are open at the top.
  • a specific embodiment of the cavity resonators is not specified.
  • These cavity resonators usually consist of hollow profiles with a round or in particular rectangular cross section.
  • the hollow profiles have different lengths and, according to FIG. 3, are arranged lengthwise in a box-like attachment.
  • each individual hollow profile is provided with its own floor, or the hollow profiles have a common floor panel on which they are placed.
  • the disadvantage of this embodiment of DE 195 09 678 claim 3 is that the manufacture of the attachment is time-consuming and cost-intensive, since the attachment has to be assembled from many different individual pieces.
  • the attachment consists of a honeycomb-shaped composite of individual sheets inserted into one another.
  • the vertically arranged cavities are arranged in particular in cylindrical form in cassettes with a trapezoidal and constant cross-sectional profile.
  • the different height of the cavities is tailored to the distribution of the expected sound spectrum to be insulated.
  • the cross-sectional areas are advantageously subdivided in the longitudinal direction into 15 to 20 strip segments, with very good sound insulation being achieved in particular with 18 segments.
  • the width can be up to 50% greater than the length (component length transverse to the soundproof wall), an optimum with a length to width ratio of 4: 5 being found.
  • the slots are cut according to the invention in a curved shape with an increased slot width (slightly larger than the material thickness). This prevents the inserted sheets from bending, tilting and rattling if the slot widths are too large.
  • the nested metal sheets thus form a tight network of rectangular cavities and, after assembly, are supported in at least 4 points in the ideal position without the friction and clamping forces generated during flat contact occurring. When the sheets are aligned vertically, three point contacts are sufficient for fixation, while further point contacts stabilize the alignment by adhesion.
  • the honeycomb structure made of inserted sheets receives a very high degree of precision with regard to alignment and honeycomb size and also forms a firm bond in weather conditions, particularly storms.
  • FIG. 2 schematically shows a U-shaped frame with two supporting webs for receiving the individual sheets of the attachment
  • Fig. 5 schematically shows a slot in the sinusoidal course with 4 pressure points and a plate inserted perpendicular to it.
  • the attachment consists of a U-shaped frame 2 according to FIG. 2 with two supporting webs, into which metal sheets 3 running parallel to the soundproofing wall are inserted from above.
  • the sheet with the greatest length is advantageously attached to the soundproofing wall and, with increasing distance from the soundproofing wall, the following sheets with shorter length.
  • the sheets 3 that run parallel to the soundproofing wall are, according to FIG. 3, bent at their lower end with a bevel angle 6, so that a base plate 1 is created as the lower end of the resonator.
  • the base plate 1 has holes or slits to ensure drainage.
  • the base plate is produced by folding from an overlong side plate 3, which runs parallel to the wall.
  • the folding angle varies from 90 ° to 90 ° + alpha, whereby alpha is set in the required trapezoidal cross-section depending on the number of resonance elements, so that a resonator closed at the bottom is created.
  • 4 trapezoidal sheets 7 perpendicular to the soundproofing wall are then inserted into the sheets 3 running parallel to the soundproofing wall from above.
  • both the trapezoidal metal sheets 7 running perpendicular to the soundproofing wall and the metal sheets 3 running parallel to the soundproofing wall are slotted at the appropriate locations, the trapezoidal metal sheets 7 running perpendicularly to the soundproofing wall from below and the metal sheets 3 running parallel to the soundproofing wall from above in particular are slotted up to half of the sheet width.
  • a different distribution of slot lengths is also possible, however, it must be ensured that the sum of both slot lengths corresponds to the sheet width at the location of the plug connection.
  • the uniform distribution of the slot widths on two different sheets is preferred. This creates a composite of sheet metal inserted crosswise.
  • the slot width is extremely important for the assembly of the metal sheets to be inserted.
  • the slot width corresponds to the sheet thickness plus a delta surcharge to prevent jamming and jamming.
  • delta 0 material tolerances result in jamming in one slot or due to tension between two adjacent slots, so that the sheet edges rub against each other and exert such high pressure on the upper edge when inserted into one another that the upper edge of the sheet is pressed in and the honeycomb system is damaged during assembly.
  • This can be remedied by over-widthening the slots with a delta> 0 surcharge.
  • This over-width again has disadvantages, since the sheets that are cross-connected no longer adhere to one another and the entire assembly becomes mechanically unstable when inserted. The sheets can move and rattle against each other, thereby reducing the acoustic function.
  • Fig. 5 shows the cutting principle of the slots with the aid of a laser.
  • the cam tracks are calculated depending on the length of the slot so that the curve travels at least 1 sine wavelength for very short slots, usually 2 full sine wavelengths. In the case of long slots, additional wave trains can also be used.
  • the position of the cutting tool is shifted at the starting point of the first cutting line by 1.5 times the sheet thickness and then the curve is traversed parallel to the first cutting line of the slot.
  • the corrugated cutting technique for reducing friction and tilting can preferably be used for longer plug connections, the cuts of which are larger than in particular 30 mm.
  • the pressure points are designed in such a way that the metal sheets at the pressure points fit exactly into the slots without excessive width in the material cutout.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Abstract

L'invention concerne un procédé pour réaliser un mur antibruit selon le préambule de la revendication principale, pour une utilisation dans le domaine ferroviaire et routier. L'invention vise à réaliser un chapeau de mur antibruit sous forme d'un résonateur selon DE 195 09 678, lequel doit s'adapter facilement aux nécessités relatives à la construction et à l'acoustique et être de fabrication peu onéreuse. A cet effet, le chapeau de l'invention est constitué par un ensemble de tôles individuelles imbriquées les unes dans les autres pour former des alvéoles. Les espaces creux verticaux sont, notamment sous forme cylindrique, disposés dans des cassettes dont le profil des sections transversales est notamment de forme trapézoïdale et identique. Les différences de hauteur des espaces creux sont adaptées à la répartition du spectre acoustique à isoler. En outre, des fentes curvilignes sont découpées avec une largeur accrue, légèrement supérieure à l'épaisseur du matériau, ce qui empêche les tôles imbriquées de se plier, de s'incliner ou de cliqueter en cas de largeur de fente trop importante.
PCT/EP2005/000901 2004-02-13 2005-01-29 Profile en metal leger a tole de fond integree pour realiser une arete de diffraction acoustiquement optimisee WO2005078196A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410007494 DE102004007494B3 (de) 2004-02-13 2004-02-13 Leichtmetallprofil mit integriertem Bodenblech zur Gestaltung einer akustisch optimierten Beugungskante
DE102004007494.1 2004-02-13

Publications (1)

Publication Number Publication Date
WO2005078196A1 true WO2005078196A1 (fr) 2005-08-25

Family

ID=34673234

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/000901 WO2005078196A1 (fr) 2004-02-13 2005-01-29 Profile en metal leger a tole de fond integree pour realiser une arete de diffraction acoustiquement optimisee

Country Status (2)

Country Link
DE (1) DE102004007494B3 (fr)
WO (1) WO2005078196A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2985365A1 (fr) * 2011-12-29 2013-07-05 Tn Int Conducteur thermique pour corps lateral d'emballage de transport et/ou d'entreposage de matieres radioactives
CN113287164A (zh) * 2018-12-06 2021-08-20 卫福布瑞克公司 干扰噪声控制单元

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT510485B1 (de) * 2010-10-06 2012-06-15 Senova Kunststoffe Ges M B H & Co Kg Aufsatz für eine schallschutzwand
CN109610357B (zh) * 2018-12-28 2021-09-10 山东金光集团有限公司 一种声屏障吸声体

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19509678C1 (de) 1995-03-07 1996-05-30 Michael Prof Dr Ing Moeser Schallschutzwand
DE202004002363U1 (de) * 2004-02-13 2004-04-22 Deutsche Bahn Ag Leichtmetallprofil mit integrierten Bodenblech zur Gestaltung einer akustisch optimierten Beugungskante

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE513424C2 (sv) * 1998-02-24 2000-09-11 Lars Nordin Anordning för dämpning av buller.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19509678C1 (de) 1995-03-07 1996-05-30 Michael Prof Dr Ing Moeser Schallschutzwand
DE202004002363U1 (de) * 2004-02-13 2004-04-22 Deutsche Bahn Ag Leichtmetallprofil mit integrierten Bodenblech zur Gestaltung einer akustisch optimierten Beugungskante

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2985365A1 (fr) * 2011-12-29 2013-07-05 Tn Int Conducteur thermique pour corps lateral d'emballage de transport et/ou d'entreposage de matieres radioactives
CN113287164A (zh) * 2018-12-06 2021-08-20 卫福布瑞克公司 干扰噪声控制单元

Also Published As

Publication number Publication date
DE102004007494B3 (de) 2005-07-14

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