EP0914521B1 - Device for damping vibration in a cable - Google Patents

Device for damping vibration in a cable Download PDF

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Publication number
EP0914521B1
EP0914521B1 EP97935609A EP97935609A EP0914521B1 EP 0914521 B1 EP0914521 B1 EP 0914521B1 EP 97935609 A EP97935609 A EP 97935609A EP 97935609 A EP97935609 A EP 97935609A EP 0914521 B1 EP0914521 B1 EP 0914521B1
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EP
European Patent Office
Prior art keywords
ring
cable
resilient
visco
flexible container
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Expired - Lifetime
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EP97935609A
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German (de)
French (fr)
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EP0914521A1 (en
Inventor
Jérôme Stubler
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Freyssinet International STUP SA
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Freyssinet International STUP SA
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports

Definitions

  • the present invention relates to a device vibration dampening of a cable. She finds a particular but not exclusive application in the field civil engineering works whose structure uses such cables, for example suspension or cable-stayed bridges.
  • cables or shrouds are subjected to vibrations due to wind and / or rain or to the circulation of vehicles on deck.
  • the invention relates more precisely to a device comprising a first member surrounding a section of the cable and secured to said section, a second member, connected to an element to which a portion of the cable is fixed, and placed around the first organ, and damping means placed between the first and second organs.
  • a device of this type for absorbing the vibrations of a shroud, is described in the European patent EP 0 343 054A.
  • the two organs define a cavity ring finger filled with a viscous substance providing the desired amortization during relative movements of two organs.
  • An object of the present invention is to provide a damping device for a live cable, responding in a simple and reliable way to sealing problems, and whose development is facilitated.
  • the invention thus provides a device depreciation of the type indicated in the introduction, in which the damping means comprise on the one hand a ring elastic or viscoelastic resting on the first organ and on the second member, on the other hand, a flexible tank containing a viscous substance, this flexible tank being housed in an annular compartment formed between the first and second organs.
  • the flexible tank constitutes a chamber constant volume damping for which the tightness is easily achieved. Cable vibrations are effectively mitigated by the combined effect of the ring elastic or viscoelastic and viscous damping provided by the substance contained in the flexible tank. The dissipation of vibrational energy results from displacements of the viscous substance in the tank flexible, stressed when the cable vibrates in relation to the element to which it is attached.
  • the reservoir flexible consists of a hose wound in the compartment annular. We can thus adapt to different dimensions cable or shroud to be damped, by simply adjusting the hose length.
  • the elastic or viscoelastic ring can consist of two generally semi-cylindrical parts which can be fixed to each other by means of pins substantially parallel to the cable section, assembly bolts or still a tightening belt.
  • each of these parts comprises several metal half-rings embedded in a material elastic or viscoelastic molded, the ends of half-rings protruding from the molded material and being respectively provided with assembly means such as pinout holes.
  • each piece has two outer half-rings of same diameter, located on both sides, a half-ring inner of smaller diameter relative to the direction of the cable section. This is the flexibility of the elastic or viscoelastic material between the half-ring inner and outer half-rings which allows the relative movement of the cable section relative to the second organ, while exerting a return effort towards the normal position.
  • Figure 1 schematically shows where a damping device can be placed according to the invention on the stay cable 6 of a structure 8 such as a bridge wire.
  • the stay cable is anchored at its two ends on respective blocks 10 integral with foundations or appropriate structural elements 12.
  • the device damping is placed near the lower end 14 of the stay cable 6, anchored in the deck 12 of the bridge.
  • a similar structure can be placed near from the upper end of the stay cable 6, anchored in a pylon from the bridge.
  • the end 14 of the guy wire passes through a guide rigid tubular 16 fixed to the anchor block 10.
  • FIGs 2 and 3 illustrate a possible mounting of the inner tube 20 on the shroud 6 in the case where the latter consists of strands gathered in a section bundle hexagonal.
  • the tube 20 consists of two semi-cylindrical portions 20a, 20b each belonging to a shell respective.
  • Each of the shells has three plates 34 which are applied against sides of the section hexagonal shroud, with interposition of a strip of glue 36.
  • Longitudinal shims 38 are welded between the semi-cylindrical portion 20a and the plates 34, in the center of these last.
  • the plates 34 have two axial ends protruding from the tube 20. At these ends, both shells have edges side 40 allowing their assembly by means of screws 42. Tightening the screws 42 makes it possible to block the tube 20 on the stay section 6.
  • the outer tube 22 is presented as a box cylindrical which, in service, is fixed to the tubular guide 16 anchored to the foundation.
  • the outer tube 22 presents towards the lower end of the shroud a flange 46 bolted on a complementary flange 48 provided at the outlet of the guide tubular 16.
  • the elastic ring 24 is made up of two shaped halves general semi-cylindrical assembled after their implementation place on the inner tube 20.
  • Such a half of a ring 50 is shown on the figure 4. It consists of three metal half-rings 52, 54, 56 embedded by molding in an elastomeric material 58, namely two outer half-rings of the same diameter 52, 54 and an inner half-ring of smaller diameter 56.
  • the elastomeric material 58 has a cross section generally V-shaped, the inner half-ring 56 being located at the base of this V, and the two half-rings 52, 54 being located at the ends of the branches of this V.
  • the groove 32 is thus defined between the two branches of the V made of elastomeric material capable of compress under the effect of transverse vibrations of the guy 6.
  • the metal half-rings 52, 54, 56 each have, over the majority of their perimeter, a section rectangular in shape.
  • the half-rings 52, 54, 56 each have their two ends 62, 64, 66 which protrude from the material molded elastomer 58.
  • One end 62, 64, 66 of each half ring 52, 54, 56 is in the form of a yoke provided with a pinout hole 72, 74, 76, while the other end 63, 65, 67 has a shape complementary to the screed and is provided with a corresponding pin hole 73, 75, 77.
  • the pinholes 72-77 allow the assembly of two ring halves 50 using three pairs of pins 82, 84, 86 extending parallel to the direction of the shroud section 6 (see the lower part of the figure 2).
  • Half a ring 50 is easily manufactured in injecting the elastomeric material 58 into a form mold appropriate in which we have previously placed the three half-rings 52, 54, 56, then by vulcanizing the elastomeric material.
  • the stiffness of the elastic ring 24 can be adjusted according to the dynamic properties sought in playing on the elasticity parameters and the thicknesses of the elastic or viscoelastic molded material.
  • the flexible hose 26 is helically wound in compartment 30 delimited on the one hand by the groove 32 of the ring 24, and on the other hand by the inner face of the outer tube 22.
  • the hose 26 has a of its closed ends, and its other end which communicates with the outside of compartment 30 by through a bore 90 formed in a spindle 84 of one of the pairs of half-rings outer 54 of the elastic ring 24.
  • This end 92 hose 26 is thus accessible to fill the latter with viscous damping substance.
  • This substance 28 is typically an oil or other viscous fluid, or a viscous gel whose viscosity is optimized as a function characteristics of the shroud to be amortized.
  • the installation of the damping device described above takes place for example as follows.
  • the guy wires 6 are installed and anchored at their two ends, passing them through the tubular guide 16 and the outer tube 22.
  • the tube 22 is then moved away from the guide 16 to give access to the section of the shroud receiving the device.
  • the inner tube 20 is put in place and blocked on the stay section by assembling its two shells and by tightening the screws 42.
  • the two halves of the ring 24 are then placed around the inner tube 20, then paperbacks.
  • the outer tube 22 is engaged around together, we fill the hose 26 with the oil 28, and we fixes the outer tube 22 on the flange 48 of the guide tubular 16.
  • the strand 6 has an envelope external protector, it can be fixed on the end of the outer tube 22 opposite the guide 16.
  • Figure 5 shows an alternative embodiment of the invention, in which the ring 24 and the compartment annular where the flexible tank is housed are juxtaposed the along the direction of the shroud section 6.
  • the tube interior is divided into two juxtaposed sections 100,101 attached to the shroud as described with reference to the Figure 3.
  • One of these sections 100 receives the ring 24 which has the same structure and the same mounting method as previously ( Figure 4), except that the groove 32 is not used to contain the viscous substance tank.
  • the other section 101 of the inner tube is provided with two transverse flanges 103,104 at its two ends axial.
  • the annular compartment 105 receiving the flexible tank 106 of viscous material 28, is internally delimited by the section 101 of the tube inside, and axially by the two flanges 103,104. Towards the outside, this compartment 105 is delimited by a ring 107 acting like a piston.
  • This ring 107 is presented in the form of two half-rings assembled around the shroud during the installation of the device. Outwards, the half-rings have radial protrusions 108 by which they bear against the outer tube 22.
  • the flexible tank 106 consists of a pocket occupying the axial length of annular compartment 105 and enveloping the perimeter of the tube section 101.
  • This pocket 106 is filled with viscous substance 28 after installation of the assembly by conduits 109 passing through the ring 107 and its outgrowths 108 as shown in FIG. 5.
  • the vibrations of the shroud make the piston ring 107 moves radially relative to the tube section 101 and to the flanges 103,104 so that the substance contained in pocket 106 moves into a chamber constant volume and provides the desired amortization.
  • a device according to the invention can be used to absorb the vibrations of a cable other than a stay cable, for example a load-bearing cable or a suspension from a suspension bridge or an undersea cable ...
  • the portion of the cable attached to a foundation or the like is not necessarily one of its extremities.
  • the element to which is fixed this portion can be a foundation or any element of structure, including a network of cables.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Vibration Prevention Devices (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Description

La présente invention concerne un dispositif d'amortissement des vibrations d'un câble. Elle trouve une application particulière mais non exclusive dans le domaine des ouvrages de génie civil dont la structure utilise de tels câbles, par exemple des ponts suspendus ou à haubans.The present invention relates to a device vibration dampening of a cable. She finds a particular but not exclusive application in the field civil engineering works whose structure uses such cables, for example suspension or cable-stayed bridges.

Ces câbles ou haubans sont soumis à des vibrations dues au vent et/ou à la pluie ou encore à la circulation de véhicules sur le pont.These cables or shrouds are subjected to vibrations due to wind and / or rain or to the circulation of vehicles on deck.

L'invention concerne plus précisément un dispositif comprenant un premier organe entourant un tronçon du câble et solidarisé avec ledit tronçon, un second organe, relié à un élément auquel est fixée une portion du câble, et placé autour du premier organe, et des moyens d'amortissement placés entre les premier et second organes.The invention relates more precisely to a device comprising a first member surrounding a section of the cable and secured to said section, a second member, connected to an element to which a portion of the cable is fixed, and placed around the first organ, and damping means placed between the first and second organs.

Un dispositif de ce type, pour amortir les vibrations d'un hauban, est décrit dans le brevet européen EP 0 343 054A. Dans le dispositif d'amortissement présenté dans ce document, les deux organes délimitent une cavité annulaire remplie d'une substance visqueuse procurant l'amortissement souhaité lors de mouvements relatifs des deux organes.A device of this type, for absorbing the vibrations of a shroud, is described in the European patent EP 0 343 054A. In the damping device presented in this document, the two organs define a cavity ring finger filled with a viscous substance providing the desired amortization during relative movements of two organs.

Ce dispositif antérieur présente de bonnes performances en termes d'amortissement. Il a en outre l'avantage d'être relativement compact et de ne pas nuire à l'esthétique de l'ouvrage. Toutefois, la réalisation de l'étanchéité entre la cavité annulaire et l'extérieur peut être délicate. Un ensemble de joints doit être mis en place, ce qui limite la fiabilité du dispositif et complique son installation. D'autre part, la mise au point d'un dispositif particulier nécessite une conception spéciale des deux organes et de moyens d'étanchéité appropriés, cette conception devant être recommencée chaque fois, par exemple, qu'on change les dimensions du hauban ou les propriétés dynamiques recherchées.This prior device has good depreciation performance. He also the advantage of being relatively compact and of not harming the aesthetics of the work. However, the achievement of the seal between the annular cavity and the outside can be delicate. A set of seals must be put in place, which limits the reliability of the device and complicates its installation. On the other hand, the development of a device particular requires a special design of both organs and suitable sealing means, this design to be restarted each time, for example, that we change the dimensions of the shroud or the properties dynamics sought.

En outre, on connaít un support souple d'un câble du document DE 295 17 250 U.In addition, there is known a flexible support for a cable from the document DE 295 17 250 U.

Un but de la présente invention est de proposer un dispositif amortisseur pour un câble sous tension, répondant de manière simple et fiable aux problèmes d'étanchéité, et dont la mise au point soit facilitée.An object of the present invention is to provide a damping device for a live cable, responding in a simple and reliable way to sealing problems, and whose development is facilitated.

L'invention propose ainsi un dispositif d'amortissement du type indiqué en introduction, dans lequel les moyens d'amortissement comprennent d'une part un anneau élastique ou viscoélastique s'appuyant sur le premier organe et sur le second organe, d'autre part un réservoir souple contenant une substance visqueuse, ce réservoir souple étant logé dans un compartiment annulaire formé entre les premier et second organes.The invention thus provides a device depreciation of the type indicated in the introduction, in which the damping means comprise on the one hand a ring elastic or viscoelastic resting on the first organ and on the second member, on the other hand, a flexible tank containing a viscous substance, this flexible tank being housed in an annular compartment formed between the first and second organs.

Le réservoir souple constitue une chambre d'amortissement à volume constant pour laquelle l'étanchéité est facilement réalisée. Les vibrations du câble sont atténuées efficacement par l'effet combiné de l'anneau élastique ou viscoélastique et de l'amortissement visqueux procuré par la substance contenue dans le réservoir souple. La dissipation de l'énergie vibratoire résulte des déplacements de la substance visqueuse dans le réservoir souple, sollicités lorsque le câble vibre par rapport à l'élément auquel il est fixé.The flexible tank constitutes a chamber constant volume damping for which the tightness is easily achieved. Cable vibrations are effectively mitigated by the combined effect of the ring elastic or viscoelastic and viscous damping provided by the substance contained in the flexible tank. The dissipation of vibrational energy results from displacements of the viscous substance in the tank flexible, stressed when the cable vibrates in relation to the element to which it is attached.

Dans un mode de réalisation préféré, le réservoir souple consiste en un boyau enroulé dans le compartiment annulaire. On peut ainsi s'adapter à différentes dimensions du câble ou hauban à amortir, en ajustant simplement la longueur du boyau.In a preferred embodiment, the reservoir flexible consists of a hose wound in the compartment annular. We can thus adapt to different dimensions cable or shroud to be damped, by simply adjusting the hose length.

Pour faciliter la mise en place du dispositif, l'anneau élastique ou viscoélastique peut se composer de deux pièces de forme générale semi-cylindrique qui peuvent être fixées l'une à l'autre au moyen de broches sensiblement parallèles au tronçon de câble, de boulons d'assemblage ou encore d'une ceinture de serrage.To facilitate the installation of the device, the elastic or viscoelastic ring can consist of two generally semi-cylindrical parts which can be fixed to each other by means of pins substantially parallel to the cable section, assembly bolts or still a tightening belt.

Avantageusement, chacune de ces pièces comporte plusieurs demi-bagues métalliques noyées dans une matière élastique ou viscoélastique moulée, les extrémités de demi-bagues dépassant de la matière moulée et étant respectivement pourvues de moyens d'assemblage tels que des orifices de brochage.Advantageously, each of these parts comprises several metal half-rings embedded in a material elastic or viscoelastic molded, the ends of half-rings protruding from the molded material and being respectively provided with assembly means such as pinout holes.

Dans un mode de réalisation de ce dernier type, chacune des pièces comporte deux demi-bagues extérieures de même diamètre, situées de part et d'autre, une demi-bague intérieure de moindre diamètre relativement à la direction du tronçon de câble. C'est alors la flexibilité de la matière élastique ou viscoélastique entre la demi-bague intérieure et les demi-bagues extérieures qui autorise le mouvement relatif du tronçon de câble par rapport au second organe, tout en exerçant un effort de rappel vers la position normale.In an embodiment of the latter type, each piece has two outer half-rings of same diameter, located on both sides, a half-ring inner of smaller diameter relative to the direction of the cable section. This is the flexibility of the elastic or viscoelastic material between the half-ring inner and outer half-rings which allows the relative movement of the cable section relative to the second organ, while exerting a return effort towards the normal position.

D'autres particularités et avantages de la présente invention apparaítront dans la description ci-après d'exemples de réalisation non limitatifs, en référence aux dessins annexés, dans lesquels :

  • la figure 1 montre schématiquement comment se place un dispositif selon l'invention près d'une extrémité ancrée d'un hauban ;
  • la figure 2 est une vue en coupe axiale d'un dispositif selon l'invention ;
  • la figure 3 est une vue en coupe transversale, selon le plan III-III indiqué sur la figure 2, d'un tube intérieur du dispositif, et montrant en outre le plan de coupe II-II de la figure 2 ;
  • la figure 4 est une vue en perspective d'une pièce moulée formant la moitié d'un anneau élastique du dispositif représenté sur la figure 2 ; et
  • la figure 5 est une vue en coupe axiale d'un autre exemple de réalisation d'un dispositif selon l'invention.
Other particularities and advantages of the present invention will appear in the description below of nonlimiting exemplary embodiments, with reference to the appended drawings, in which:
  • Figure 1 shows schematically how a device according to the invention is placed near an anchored end of a stay;
  • Figure 2 is an axial sectional view of a device according to the invention;
  • Figure 3 is a cross-sectional view, along the plane III-III shown in Figure 2, of an inner tube of the device, and further showing the section plane II-II of Figure 2;
  • Figure 4 is a perspective view of a molded part forming half of an elastic ring of the device shown in Figure 2; and
  • Figure 5 is an axial sectional view of another embodiment of a device according to the invention.

La figure 1 montre de façon schématique l'endroit où on peut placer un dispositif d'amortissement selon l'invention sur le hauban 6 d'un ouvrage 8 tel qu'un pont à haubans.Figure 1 schematically shows where a damping device can be placed according to the invention on the stay cable 6 of a structure 8 such as a bridge wire.

De façon connue, le hauban est ancré à ses deux extrémités sur des blocs respectifs 10 solidaires de fondations ou d'éléments de structure appropriés 12. Dans l'exemple représenté sur la figure 1, le dispositif d'amortissement est placé près de l'extrémité inférieure 14 du hauban 6, ancrée dans le tablier 12 du pont. On comprendra qu'une structure analogue peut être placée près de l'extrémité supérieure du hauban 6, ancrée dans un pylône du pont.In a known manner, the stay cable is anchored at its two ends on respective blocks 10 integral with foundations or appropriate structural elements 12. In the example shown in Figure 1, the device damping is placed near the lower end 14 of the stay cable 6, anchored in the deck 12 of the bridge. We will understand that a similar structure can be placed near from the upper end of the stay cable 6, anchored in a pylon from the bridge.

L'extrémité 14 du hauban passe dans un guide tubulaire rigide 16 fixé au bloc d'ancrage 10.The end 14 of the guy wire passes through a guide rigid tubular 16 fixed to the anchor block 10.

Le dispositif d'amortissement, qui est représenté très schématiquement sur la figure 1 et de façon plus détaillée sur la figure 2, comporte :

  • un tube intérieur 20 dans lequel passe un tronçon du hauban 6, et solidarisé à ce tronçon ;
  • un tube extérieur 22 placé autour du tube intérieur 20 ;
  • un anneau élastique ou viscoélastique 24 dont une face interne s'appuie contre le tube intérieur 20 et une face externe s'appuie contre le tube extérieur 22 ;
  • un réservoir souple tel qu'un boyau 26 contenant une substance visqueuse 28. Dans l'exemple de la figure 2, ce réservoir 26 est logé dans un compartiment annulaire 30 délimité d'une part par une gorge annulaire 32 à profil en V présente sur une face de l'anneau élastique 24, et d'autre part par l'un des tubes 20, 22 (le tube extérieur 22 dans l'exemple représenté).
The damping device, which is shown very schematically in Figure 1 and in more detail in Figure 2, comprises:
  • an inner tube 20 through which passes a section of the shroud 6, and secured to this section;
  • an outer tube 22 placed around the inner tube 20;
  • an elastic or viscoelastic ring 24, one internal face of which bears against the internal tube 20 and one external face of which bears against the external tube 22;
  • a flexible reservoir such as a hose 26 containing a viscous substance 28. In the example of FIG. 2, this reservoir 26 is housed in an annular compartment 30 delimited on the one hand by an annular groove 32 with a V profile present on one face of the elastic ring 24, and on the other hand by one of the tubes 20, 22 (the outer tube 22 in the example shown).

Les figures 2 et 3 illustrent un montage possible du tube intérieur 20 sur le hauban 6 dans le cas où ce dernier se compose de torons rassemblés en un faisceau de section hexagonale. Le tube 20 consiste en deux portions semi-cylindriques 20a, 20b appartenant chacune à une coquille respective. Chacune des coquilles comporte trois plaques 34 qui viennent s'appliquer contre des côtés du tronçon hexagonal du hauban, avec interposition d'une bande de colle 36. Des cales longitudinales 38 sont soudées entre la portion semi-cylindrique 20a et les plaques 34, au centre de ces dernières. Comme le montre la figure 1, les plaques 34 ont deux extrémités axiales qui dépassent du tube 20. A ces extrémités, les deux coquilles comportent des rebords latéraux 40 permettant leur assemblage au moyen de vis 42. Le serrage des vis 42 permet de bloquer le tube 20 sur le tronçon du hauban 6.Figures 2 and 3 illustrate a possible mounting of the inner tube 20 on the shroud 6 in the case where the latter consists of strands gathered in a section bundle hexagonal. The tube 20 consists of two semi-cylindrical portions 20a, 20b each belonging to a shell respective. Each of the shells has three plates 34 which are applied against sides of the section hexagonal shroud, with interposition of a strip of glue 36. Longitudinal shims 38 are welded between the semi-cylindrical portion 20a and the plates 34, in the center of these last. As shown in Figure 1, the plates 34 have two axial ends protruding from the tube 20. At these ends, both shells have edges side 40 allowing their assembly by means of screws 42. Tightening the screws 42 makes it possible to block the tube 20 on the stay section 6.

Le tube extérieur 22 se présente comme un boítier cylindrique qui, en service, est fixé au guide tubulaire 16 ancré à la fondation. Dans l'exemple de montage schématisé sur la figure 1, le tube extérieur 22 présente vers l'extrémité inférieure du hauban un flasque 46 boulonné sur un flasque complémentaire 48 prévu à la sortie du guide tubulaire 16.The outer tube 22 is presented as a box cylindrical which, in service, is fixed to the tubular guide 16 anchored to the foundation. In the schematic assembly example in FIG. 1, the outer tube 22 presents towards the lower end of the shroud a flange 46 bolted on a complementary flange 48 provided at the outlet of the guide tubular 16.

Pour faciliter son installation sur le hauban, l'anneau élastique 24 est constitué en deux moitiés de forme générale semi-cylindrique assemblées après leur mise en place sur le tube intérieur 20.To facilitate its installation on the stay, the elastic ring 24 is made up of two shaped halves general semi-cylindrical assembled after their implementation place on the inner tube 20.

Une telle moitié d'anneau 50 est représentée sur la figure 4. Elle se compose de trois demi-bagues métalliques 52, 54, 56 noyées par moulage dans une matière élastomère 58, à savoir deux demi-bagues extérieures de même diamètre 52, 54 et une demi-bague intérieure de moindre diamètre 56. Dans un plan radial, la matière élastomère 58 a une section de forme générale en V, la demi-bague intérieure 56 étant située à la base de ce V, et les deux demi-bagues extérieures 52, 54 étant situées aux extrémités des branches de ce V. La gorge 32 se trouve ainsi définie entre les deux branches du V constituées de matériau élastomère capable de se comprimer sous l'effet des vibrations transversales du hauban 6.Such a half of a ring 50 is shown on the figure 4. It consists of three metal half-rings 52, 54, 56 embedded by molding in an elastomeric material 58, namely two outer half-rings of the same diameter 52, 54 and an inner half-ring of smaller diameter 56. In a radial plane, the elastomeric material 58 has a cross section generally V-shaped, the inner half-ring 56 being located at the base of this V, and the two half-rings 52, 54 being located at the ends of the branches of this V. The groove 32 is thus defined between the two branches of the V made of elastomeric material capable of compress under the effect of transverse vibrations of the guy 6.

Ainsi que le montrent la partie supérieure de la figure 2 et l'arrachement partiel de la matière élastomère 58 sur la figure 4, les demi-bagues métalliques 52, 54, 56 ont chacune, sur la majorité de leur périmètre, une section de forme rectangulaire. Pour permettre l'assemblage des deux moitiés 50, les demi-bagues 52, 54, 56 ont chacune leurs deux extrémités 62, 64, 66 qui dépassent de la matière élastomère moulée 58. Une extrémité 62, 64, 66 de chaque demi-bague 52, 54, 56 est en forme de chape pourvue d'un orifice de brochage 72, 74, 76, tandis que l'autre extrémité 63, 65, 67 a une forme complémentaire de la chape et est pourvue d'un orifice de brochage correspondant 73, 75, 77. Les orifices de brochage 72-77 permettent l'assemblage des deux moitiés d'anneau 50 au moyen de trois paires de broches 82, 84, 86 s'étendant parallèlement à la direction du tronçon de hauban 6 (voir la partie inférieure de la figure 2).As shown in the upper part of the Figure 2 and the partial cutaway of the elastomeric material 58 in FIG. 4, the metal half-rings 52, 54, 56 each have, over the majority of their perimeter, a section rectangular in shape. To allow the assembly of the two halves 50, the half-rings 52, 54, 56 each have their two ends 62, 64, 66 which protrude from the material molded elastomer 58. One end 62, 64, 66 of each half ring 52, 54, 56 is in the form of a yoke provided with a pinout hole 72, 74, 76, while the other end 63, 65, 67 has a shape complementary to the screed and is provided with a corresponding pin hole 73, 75, 77. The pinholes 72-77 allow the assembly of two ring halves 50 using three pairs of pins 82, 84, 86 extending parallel to the direction of the shroud section 6 (see the lower part of the figure 2).

Une moitié d'anneau 50 est aisément fabriquée en injectant la matière élastomère 58 dans un moule de forme appropriée dans lequel on a préalablement placé les trois demi-bagues 52, 54, 56, puis en faisant vulcaniser la matière élastomère. La raideur de l'anneau élastique 24 peut être ajustée selon les propriétés dynamiques recherchées en jouant sur les paramètres d'élasticité et les épaisseurs de la matière élastique ou viscoélastique moulée.Half a ring 50 is easily manufactured in injecting the elastomeric material 58 into a form mold appropriate in which we have previously placed the three half-rings 52, 54, 56, then by vulcanizing the elastomeric material. The stiffness of the elastic ring 24 can be adjusted according to the dynamic properties sought in playing on the elasticity parameters and the thicknesses of the elastic or viscoelastic molded material.

Dans le dispositif de la figure 2, le boyau souple 26 est enroulé en hélice dans le compartiment 30 délimité d'une part par la gorge 32 de l'anneau 24, et d'autre part par la face interne du tube extérieur 22. Le boyau 26 a une de ses extrémités fermée, et son autre extrémité qui communique avec l'extérieur du compartiment 30 par l'intermédiaire d'un alésage 90 ménagé dans une broche d'assemblage 84 de l'une des paires de demi-bagues extérieures 54 de l'anneau élastique 24. Cette extrémité 92 du boyau 26 est ainsi accessible pour remplir ce dernier avec la substance visqueuse d'amortissement. Cette substance 28 est typiquement une huile ou un autre fluide visqueux, ou un gel visqueux dont la viscosité est optimisée en fonction des caractéristiques du hauban à amortir.In the device of Figure 2, the flexible hose 26 is helically wound in compartment 30 delimited on the one hand by the groove 32 of the ring 24, and on the other hand by the inner face of the outer tube 22. The hose 26 has a of its closed ends, and its other end which communicates with the outside of compartment 30 by through a bore 90 formed in a spindle 84 of one of the pairs of half-rings outer 54 of the elastic ring 24. This end 92 hose 26 is thus accessible to fill the latter with viscous damping substance. This substance 28 is typically an oil or other viscous fluid, or a viscous gel whose viscosity is optimized as a function characteristics of the shroud to be amortized.

L'installation du dispositif d'amortissement décrit ci-dessus se déroule par exemple de la façon suivante. Les torons du hauban 6 sont installés et ancrés à leurs deux extrémités, en les passant à travers le guide tubulaire 16 et le tube extérieur 22. Le tube 22 est ensuite écarté du guide 16 pour donner accès au tronçon du hauban recevant le dispositif. Le tube intérieur 20 est mis en place et bloqué sur le tronçon du hauban en assemblant ses deux coquilles et en serrant les vis 42. Les deux moitiés de l'anneau 24 sont ensuite mises en place autour du tube intérieur 20, puis brochées. Après avoir enroulé le boyau souple 26 dans la gorge 32, on engage le tube extérieur 22 autour de l'ensemble, on remplit le boyau 26 avec l'huile 28, et on fixe le tube extérieur 22 sur le flasque 48 du guide tubulaire 16. Lorsque le toron 6 comporte une enveloppe protectrice externe, celle-ci peut être fixée sur l'extrémité du tube extérieur 22 opposée au guide 16.The installation of the damping device described above takes place for example as follows. The guy wires 6 are installed and anchored at their two ends, passing them through the tubular guide 16 and the outer tube 22. The tube 22 is then moved away from the guide 16 to give access to the section of the shroud receiving the device. The inner tube 20 is put in place and blocked on the stay section by assembling its two shells and by tightening the screws 42. The two halves of the ring 24 are then placed around the inner tube 20, then paperbacks. After having wound the flexible hose 26 in the groove 32, the outer tube 22 is engaged around together, we fill the hose 26 with the oil 28, and we fixes the outer tube 22 on the flange 48 of the guide tubular 16. When the strand 6 has an envelope external protector, it can be fixed on the end of the outer tube 22 opposite the guide 16.

La figure 5 montre une variante de réalisation de l'invention, dans laquelle l'anneau 24 et le compartiment annulaire où est logé le réservoir souple sont juxtaposés le long de la direction du tronçon de hauban 6. Le tube intérieur est divisé en deux tronçons juxtaposés 100,101 fixés au hauban de la manière décrite en référence à la figure 3. L'un de ces tronçons 100 reçoit l'anneau 24 qui a la même structure et le même mode de montage que précédemment (figure 4), sauf que la gorge 32 ne sert pas à contenir le réservoir de substance visqueuse.Figure 5 shows an alternative embodiment of the invention, in which the ring 24 and the compartment annular where the flexible tank is housed are juxtaposed the along the direction of the shroud section 6. The tube interior is divided into two juxtaposed sections 100,101 attached to the shroud as described with reference to the Figure 3. One of these sections 100 receives the ring 24 which has the same structure and the same mounting method as previously (Figure 4), except that the groove 32 is not used to contain the viscous substance tank.

L'autre tronçon 101 du tube intérieur est pourvu de deux flasques transversaux 103,104 à ses deux extrémités axiales. Le compartiment annulaire 105, recevant le réservoir souple 106 de la matière visqueuse 28, est délimité intérieurement par le tronçon 101 du tube intérieur, et axialement par les deux flasques 103,104. Vers l'extérieur, ce compartiment 105 est délimité par une bague 107 agissant comme un piston. Cette bague 107 se présente sous forme de deux demi-bagues assemblées autour du hauban lors de la mise en place du dispositif. Vers l'extérieur, les demi-bagues présentent des excroissances radiales 108 par lesquelles elles prennent appui contre le tube extérieur 22.The other section 101 of the inner tube is provided with two transverse flanges 103,104 at its two ends axial. The annular compartment 105, receiving the flexible tank 106 of viscous material 28, is internally delimited by the section 101 of the tube inside, and axially by the two flanges 103,104. Towards the outside, this compartment 105 is delimited by a ring 107 acting like a piston. This ring 107 is presented in the form of two half-rings assembled around the shroud during the installation of the device. Outwards, the half-rings have radial protrusions 108 by which they bear against the outer tube 22.

Dans le mode de réalisation de la figure 5, le réservoir souple 106 consiste en une poche occupant la longueur axiale du compartiment annulaire 105 et enveloppant le périmètre du tronçon de tube 101. Cette poche 106 est remplie de substance visqueuse 28 après installation de l'ensemble par des conduits 109 traversant la bague 107 et ses excroissances 108 comme le montre la figure 5. En service, les vibrations du hauban font que la bague-piston 107 se déplace radialement par rapport au tronçon de tube 101 et aux flasques 103,104 de sorte que la substance contenue dans la poche 106 se déplace dans une chambre à volume constant et procure l'amortissement souhaité.In the embodiment of FIG. 5, the flexible tank 106 consists of a pocket occupying the axial length of annular compartment 105 and enveloping the perimeter of the tube section 101. This pocket 106 is filled with viscous substance 28 after installation of the assembly by conduits 109 passing through the ring 107 and its outgrowths 108 as shown in FIG. 5. In service, the vibrations of the shroud make the piston ring 107 moves radially relative to the tube section 101 and to the flanges 103,104 so that the substance contained in pocket 106 moves into a chamber constant volume and provides the desired amortization.

Bien qu'on ait décrit l'invention en référence à des exemples de réalisation particuliers, on comprendra que diverses variantes peuvent être apportées à ces exemples sans sortir du cadre de la présente invention dans la mesure où elles sont décrites dans les revendications. Ainsi, un dispositif selon l'invention peut servir à amortir les vibrations d'un câble autre qu'un hauban, par exemple un câble porteur ou une suspente d'un pont suspendu ou encore un câble sous-marin... La portion du câble fixée à une fondation ou analogue n'est pas obligatoirement l'une de ses extrémités. D'autre part l'élément auquel est fixée cette portion peut être une fondation ou tout élément de structure, y compris un réseau de câbles.Although the invention has been described with reference to particular examples of realization, it will be understood that various variations can be made to these examples without departing from the scope of the present invention insofar as they are described in the claims. So a device according to the invention can be used to absorb the vibrations of a cable other than a stay cable, for example a load-bearing cable or a suspension from a suspension bridge or an undersea cable ... The portion of the cable attached to a foundation or the like is not necessarily one of its extremities. On the other hand the element to which is fixed this portion can be a foundation or any element of structure, including a network of cables.

Claims (10)

  1. A device for damping vibration in a tensioned cable, including a first member surrounding and secured to a section of the cable, a second member connected to an element to which a portion of the cable is attached, and arranged around the first member, and damping means arranged between the first and second members, characterised in that the damping means include on the one hand a resilient or visco-elastic ring engaging the first member and the second member, and on the other hand a flexible container containing a viscous substance, this flexible container being housed in a ring-shaped compartment formed oetween the first and second members.
  2. A device according to claim 1, characterised in that the flexible container consists of a hose coiled in the ring-shaped compartment.
  3. A device according to claims 1 or 2, wherein the resilient or visco-elastic ring is composed of two parts of generally semi-cylindrical shape.
  4. A device according to claim 3, wherein the two parts of generally semi-cylindrical shape are attached to each other by means of pins approximately parallel to the cable section.
  5. A device according to claims 2, 3 or 4, wherein each of the parts of generally semi-cylindrical shape comprises several metal half-bushings sunk into a moulded resilient or visco-elastic material, the ends of the half-bushings protruding from the moulded material and being respectively provided with assembly means.
  6. A device according to claim 5, wherein each of the parts of generally semi-cylindrical shape comprises two outer half-bushings of the same diameter located on either side of an inner half-bushing of smaller diameter relative to the direction of the cable section, the flexibility of the resilient or visco-elastic material between the inner half-bushing and the outer half-bushings admitting of a relative motion of the cable section relative to the second member
  7. A device according to any one of the previous claims, wherein the resilient or visco-elastic ring has a groove which, with one of the said members delimits the said ring-shaped compartment.
  8. A device according to claims 4 and 7, wherein one of the pins comprises an axial bore giving access to the flexible container for its filling.
  9. A device according to any one of claims 1 to 6, wherein the resilient or viscc-elastic ring and the ring-shaped compartment where the flexible container is housed are juxtaposed along the direction of the cable section.
  10. A device according to claim 9, wherein the ring-shaped compartment is delimited internally by the first member, axially by two transverse flanges integral with the first member, and externally by a bushing resting on the second member and movable radially between the flanges relative to the first member
EP97935609A 1996-07-26 1997-07-23 Device for damping vibration in a cable Expired - Lifetime EP0914521B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9609449 1996-07-26
FR9609449A FR2751673B1 (en) 1996-07-26 1996-07-26 DEVICE FOR DAMPING THE VIBRATION OF A CABLE
PCT/FR1997/001374 WO1998004780A1 (en) 1996-07-26 1997-07-23 Device for damping vibration in a cable

Publications (2)

Publication Number Publication Date
EP0914521A1 EP0914521A1 (en) 1999-05-12
EP0914521B1 true EP0914521B1 (en) 2000-04-12

Family

ID=9494529

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Application Number Title Priority Date Filing Date
EP97935609A Expired - Lifetime EP0914521B1 (en) 1996-07-26 1997-07-23 Device for damping vibration in a cable

Country Status (13)

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US (1) US6334608B1 (en)
EP (1) EP0914521B1 (en)
JP (1) JP2000515943A (en)
CA (1) CA2260834A1 (en)
DE (1) DE69701700T2 (en)
DK (1) DK0914521T3 (en)
ES (1) ES2146480T3 (en)
FR (1) FR2751673B1 (en)
GR (1) GR3033573T3 (en)
HK (1) HK1019904A1 (en)
NO (1) NO990326L (en)
PT (1) PT914521E (en)
WO (1) WO1998004780A1 (en)

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EP2226525A1 (en) 2007-10-02 2010-09-08 Getzner Werkstoffe Holding GmbH Damping device for damping oscillations of longitudinally stretched elements

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JP2002181130A (en) * 2000-12-12 2002-06-26 Sumitomo Rubber Ind Ltd Damping device
FR2832479B1 (en) * 2001-11-19 2006-05-26 Maurer Friedrich Soehne DAMPING DEVICE FOR CABLE
FR2859260B1 (en) * 2003-09-03 2006-02-24 Freyssinet Int Stup DEVICE FOR DAMPING CABLE VIBRATION AND DAMPING METHOD THEREOF
WO2007101497A1 (en) * 2006-03-09 2007-09-13 Iro Ab Yarn tensiometer
US7298672B1 (en) * 2006-08-22 2007-11-20 Pgs Geophysical Marine seismic streamer having acoustic isolation between strength members and sensor mounting
KR100816059B1 (en) 2007-03-27 2008-03-24 케이블텍 주식회사 Cable damper
KR100980310B1 (en) * 2009-09-11 2010-09-06 문승 Fixing bracket for cable and the method
CN102733303B (en) * 2012-07-06 2015-01-14 巨力索具股份有限公司 Bending restrictor for stay cable of bridge
FR3012193B1 (en) 2013-10-23 2015-12-18 Soletanche Freyssinet DEVICE FOR DAMPING THE VIBRATION OF A CABLE
FR3012479B1 (en) 2013-10-31 2016-01-01 Soletanche Freyssinet CABLES VIBRATION DAMPING DEVICE OF AN ART WORK SUSPENSION SYSTEM
CH709002A1 (en) 2013-12-18 2015-06-30 Vsl Lnternat Ag Apparatus and method for friction damping.
CN104652271B (en) * 2014-12-22 2016-06-15 郑州市交通规划勘察设计研究院 A kind of drag-line combination anchor block of Wavelike steel webplate cable-stayed bridge
FR3033803B1 (en) * 2015-03-16 2021-01-29 Soletanche Freyssinet CABLE VIBRATION DAMPING DEVICE
JP2016199860A (en) * 2015-04-07 2016-12-01 住友ゴム工業株式会社 Rubber damper for bridge
CN109056528B (en) * 2018-09-25 2024-03-12 中铁二院工程集团有限责任公司 Railway upper-bearing type steel truss girder suspension bridge
CN112813798A (en) * 2021-02-03 2021-05-18 兰州铁道设计院有限公司 Combined corrosion-resistant supporting device for transverse earthquake resistance of bridge

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Publication number Priority date Publication date Assignee Title
EP2226525A1 (en) 2007-10-02 2010-09-08 Getzner Werkstoffe Holding GmbH Damping device for damping oscillations of longitudinally stretched elements

Also Published As

Publication number Publication date
DE69701700D1 (en) 2000-05-18
CA2260834A1 (en) 1998-02-05
FR2751673A1 (en) 1998-01-30
NO990326L (en) 1999-03-25
JP2000515943A (en) 2000-11-28
NO990326D0 (en) 1999-01-25
ES2146480T3 (en) 2000-08-01
EP0914521A1 (en) 1999-05-12
HK1019904A1 (en) 2000-03-03
PT914521E (en) 2000-08-31
GR3033573T3 (en) 2000-09-29
FR2751673B1 (en) 1998-10-02
US6334608B1 (en) 2002-01-01
DE69701700T2 (en) 2000-11-23
DK0914521T3 (en) 2000-09-25
WO1998004780A1 (en) 1998-02-05

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