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An aerodynamic structure for suppressing vortex-induced resonance of bridge cylindrical suspenders

A vortex-induced resonance, cylindrical technology, applied in the direction of bridges, bridge parts, bridge construction, etc., can solve the problems of increasing the wind resistance coefficient of the cable or suspender, and the trouble of processing the cable or suspender, so as to improve the wind resistance. The effect of stability, simple construction and wide application range

Inactive Publication Date: 2016-01-13
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of winding the spiral wire and making bumps on the surface makes the processing of the cable or boom more troublesome, and will increase the drag coefficient of the cable or boom

Method used

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  • An aerodynamic structure for suppressing vortex-induced resonance of bridge cylindrical suspenders
  • An aerodynamic structure for suppressing vortex-induced resonance of bridge cylindrical suspenders
  • An aerodynamic structure for suppressing vortex-induced resonance of bridge cylindrical suspenders

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with drawings and embodiments.

[0030] The invention aims at the problem of vortex-induced vibration of a cylindrical suspender, and adopts a spoiler to reduce the vortex-induced force on the surface of a cylindrical suspender (or other cylindrical structures, such as a cable) to suppress vortex vibration. Specifically, it includes a spoiler arranged on the circumference of the cylindrical boom or outside the circumference of the cylindrical boom, the spoiler is flat, and the plane where the spoiler is located and the plane where the central axis of the cylindrical boom is located A certain plane coincides. The spoiler is equal in length to the cylindrical boom, see figure 1 .

[0031] The numerical simulation example of setting the spoiler on one side and the spoiler is located downstream of the incoming flow (the incoming flow direction is from H to E) is as described in Table 1, and the working c...

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Abstract

The invention provides a pneumatic structure for inhibiting the vortex-induced resonance of a bridge cylindrical suspender. The pneumatic structure is realized by additionally arranging a spoiler on the cylindrical suspender. The wind resistance of the suspender is obviously improved, the vortex-induced force of the suspender is reduced, the design is convenient, the construction is simple, the effect is obvious and good inhibiting effect on the vortex-induced resonance of the suspender is realized.

Description

technical field [0001] The invention relates to an aerodynamic vibration suppression measure, in particular to an aerodynamic structure for suppressing vortex-induced resonance of a bridge cylindrical suspender. Background technique [0002] Cylindrical structures are widely used in real life, such as suspenders of arch bridges, cables of cable-stayed bridges, piers, mining platforms in offshore oil engineering, drill pipes, underwater oil pipelines, etc. Studies have shown that the boundary layer separation will occur when the fluid bypasses the surface of the cylinder, and regular vortex shedding will occur within a certain Reynolds number range. Induce vibration, fatigue or even damage to the structure. For example, the cables of a cable-stayed bridge will experience wind and rain-induced vibration under the combined action of wind and rain, and the suspenders of an arch bridge will undergo vortex-induced resonance under the action of wind. When the vibration is severe, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D19/00
Inventor 白桦王峰薛晓锋赵国辉李宇李加武车艳阳王森
Owner CHANGAN UNIV