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Device for damping cable vibration

A damping device and cable technology, applied in non-rotational vibration suppression, bridge parts, bridge forms, etc., can solve problems such as large devices

Active Publication Date: 2018-01-12
SOLETANCHE FREYSSINET SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The concept of an oscillating device therefore has its limitations: due to the very long stroke of the piston, the device becomes too bulky, as figure 1 shown

Method used

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  • Device for damping cable vibration
  • Device for damping cable vibration
  • Device for damping cable vibration

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Embodiment Construction

[0028] The invention is described hereinafter with non-limitative application to cable-stayed bridges. Vibrations of the cables, which are the stay cables 16 extending between the towers 20 of the bridge and the deck 14 to suspend the deck 14, are to be dampened.

[0029] One or more cables 16 are equipped with a damping device 22 comprising a connection point P and bridge deck 14 transverse to the cables 16 in the vicinity of the lower anchor point (for example at a few percent of the total cable length) arms extending between. In general, the arms of the damping device 22 lie substantially in the same vertical plane as the connecting cable 16 . However, the arms may deviate slightly from this plane.

[0030] image 3 shows the kinematics of the damping device 22, such as figure 2 The damping device shown in. The arm 25 of the device 22 is oriented in the direction indicated by X and is articulated on the deck of the bridge by a pivot 26 , for example of the ball joint ...

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Abstract

A device (22) for damping vibrations of a cable (16) comprising an arm (25) that oscillates about a pivot (26), a first damper (30) for damping at least a portion of the arm swing, coupling (27) connected to the cable, second linear travel damper (31) having an upper end connected to the coupling and a lower end connected to the arm, and a guide (28), The guide allows the coupler to slide relative to the arm parallel to the travel of the second damper so that movement of the cable transverse to the travel of the second damper is transferred to the arm independently of the second damper.

Description

technical field [0001] The present invention relates to techniques for damping vibrations of cables used to suspend structures. Background technique [0002] The invention is especially suitable for the suspension of cable-stayed bridges. The cables vibrate mainly due to wind and vehicle traffic. Various types of devices have been proposed for damping such vibrations. [0003] In a first type of damping device (see eg EP0343054A1 , DE29517250U1 or WO98 / 04780A1 ), the vibrational energy is dissipated around the cables, in areas radially delimited by elements fixed to the suspension structure. This element may be an arm extending between the cable and the suspension structure, or a tube housing the bottom of the cable. This type of device limits the amplitude of the damped vibrations. [0004] Another device employs a linear stroke damper, such as a hydraulic piston. These pistons may be provided on arms extending between the cables and the suspension structure (see, for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/02
CPCF16F15/02E01D11/04E01D19/16
Inventor 杰罗米·斯图布勒埃里克·梅利厄
Owner SOLETANCHE FREYSSINET SAS