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Damping vibration attenuation frame for sling

A damping and sling technology, applied to bridge parts, bridges, buildings, etc., can solve problems such as damper fatigue damage and difficulty in suppressing vibration

Active Publication Date: 2014-07-16
ZHIXING S&T
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But when the sling is very long, it is difficult to suppress this vibration by conventional dampers placed at the root of the sling
In addition, under the long-term action of wind load, these dampers that absorb vibration through relative motion between cables often suffer from fatigue damage.

Method used

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  • Damping vibration attenuation frame for sling
  • Damping vibration attenuation frame for sling
  • Damping vibration attenuation frame for sling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as Figure 1-4 As shown, a damping shock absorber for slings is used to increase the damping of suspension bridge slings, including a box-type shock absorber 1 and a cable clamp 2, the cable clamp 2 is used to connect the strands 5 of the sling, and the box The box-type vibration damping frame 1 clamps four strands 5 together with the cable clamp 2 through bolts, and the bolts used can be pre-embedded in the box-type vibration-damping frame 1, and can be attached with embedded parts for strengthening the connection. In practical applications, bolt holes can also be reserved in the box-type vibration damping frame 1, and the cable strands 5 can be clamped together with the cable clamp 2 through the bolts. The box-type vibration damping frame 1 is a box structure, and a cavity 3 is arranged inside, and an inertial mass ball 4 for vibration reduction is arranged in the cavity 3 .

[0023] Cavity 3 is filled with a viscous fluid. In this embodiment, the viscous fluid ...

Embodiment 2

[0027] The rest is the same as that of Embodiment 1, except that the viscous fluid in this embodiment is oil, and the inertial mass ball is partially submerged in the oil. The oil has a higher viscosity, and the damping effect on the inertial mass ball is more obvious. The box-type vibration damping frame is tightly connected with a cable strand, and the cable strand is installed inside the box body, and its two ends are fixed with the box body by cable clamps; the bottom surface of the cavity is a space arc surface with constant curvature, and the side The wall surface is an arc-shaped surface in space. When the box-type vibration-damping frame vibrates with the cable strands, the inertial mass ball rolls along the bottom surface and the side wall of the cavity, so that the box-type vibration-damping frame has a good vibration-damping effect.

Embodiment 3

[0029] The rest are the same as in Embodiment 1, except that the box-type vibration damping frame is tightly connected with the two strands through cable clamps, and the bottom and top surfaces of the inner cavity of the box-type vibration-damping frame are space arcs with constant curvature. When the box-type damping frame vibrates, the inertial mass ball rolls along the inner surface of the cavity when the ball of inertial mass moves inside the cavity, so that the box-type vibration-damping frame 1 has a good damping effect. vibration effect.

[0030] In the above embodiments, the viscous fluid can be any kind of fluid liquid, and can be selected according to actual needs, and there is no limitation here.

[0031] The beneficial effect of adopting the above technical scheme is: the box-type vibration damping frame is fixedly connected with one or more strands through the cable clamp, so that each strand is rigidly connected, the vibration response of each strand is reduced, ...

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Abstract

The invention provides a damping vibration attenuation frame for a sling. The damping vibration attenuation frame is used for increasing damping of the suspension bridge sling. The damping vibration attenuation frame comprises a box type attenuation frame body and a sling clamp. The sling clamp is used for being connected with a sling strand of the sling. The box type attenuation frame body is connected with the sling strand through the sling clamp in a fastening mode. The box type attenuation frame body is of a box type structure, and a cavity is formed in the box type attenuation frame body and filled with viscous fluid. At least one inertia mass ball used for vibration attenuation is arranged in the cavity and immersed into the viscous fluid wholly or partially. The damping vibration attenuation frame for the sling is used for increasing damping of the suspension bridge sling, has the functions of the vibration attenuation frame and a damper, and reduces the vibration response of the sling; the damping vibration attenuation frame is not provided with mechanical motion parts, and therefore the problem of fatigue rupture generated when a common viscoelastic damper or a viscous damper is used for vibration attenuation of the sling.

Description

technical field [0001] The invention relates to the field of vibration reduction of slings, in particular to a damping and vibration-reducing frame for slings which simultaneously functions as a vibration-damping frame and a damper. Background technique [0002] In a suspension bridge, the upper end of the suspension cable is connected to the main cable through a cable clamp, and the lower end is fixed to the bridge deck girder through an anchor head. The self-weight and live load of the bridge deck are transmitted to the main cable through the sling, and the reliability of the sling is directly related to the safety of the entire bridge. The sling can be a single strand, or a double or quadruple strand. As the span of the suspension bridge increases, the length of the suspension cables also increases accordingly. Long slings have low natural vibration frequency and small damping, and are prone to large vibrations under wind loads, which may even endanger the safety of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/16
Inventor 欧进萍李惠徐怀兵刘敏
Owner ZHIXING S&T
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