Active air suction flow control device for wind-induced vibration of cylindrical structure

A flow control and wind-induced vibration technology, applied in underwater structures, infrastructure engineering, building components, etc., can solve problems affecting the safety of structure use, structural fatigue damage, etc., to delay airflow separation, reduce wind-induced vibration, reduce Vibration principle clear effect

Inactive Publication Date: 2018-05-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although vortex-induced vibration is amplitude-limited vibration, a vortex-induced vibration generally does not cause devastating damage to the structure. However, due to its low critical wind speed, it occurs very frequently, which is likely to cause structural fatigue damage, and long-term effects will affect the safety of the structure.

Method used

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  • Active air suction flow control device for wind-induced vibration of cylindrical structure

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Such as figure 1 As shown, a cylindrical structure wind-induced vibration active suction flow control device includes a suction device, a suction main pipe and a plurality of suction branch pipes, the suction main pipe is connected with the suction device, and the inside of the cylindrical structure The axial position is provided with a suction main pipe. Inside the cylindrical structure, there are multiple suction branch pipes arranged radially from top to bottom, and each suction branch pipe is perpendicular to the direction of the incoming wind. Each suction branch pipe and the suction main pipe connection, the direction of the incoming airflow is 0°, and the two ends of each suction branch pipe are provided with suction holes at the positions of 90° and 270° on the outer wall of the cylindrical structure.

[0016] When the incoming wind flows through the cylindrical structure, the incoming air is 0°, and flow separation occurs at the positions of 90° and 270° on the...

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Abstract

The invention relates to an active air suction flow control device for wind-induced vibration of a cylindrical structure. The device comprises air suction equipment, a main air suction pipe and multiple air suction branch pipes, the main air suction pipe is connected with the air suction equipment, and the main air suction pipe is arranged on the axis in the cylindrical structure; the air suctionbranch pipes are arranged in the cylindrical structure from top to bottom in the radial direction, each air suction branch pipe is perpendicular to the wind flow direction and is connected with the main air suction pipe, and with the wind flow direction as 0 degree, air suction holes are formed in the portions, at 90 degrees and 270 degrees of the outer wall of the cylindrical structure, at the two ends of each air suction branch pipe. The active air suction flow control device is simple in structure, the vibration reduction principle is clear, and the wind-induced vibration of the bridge cylindrical structure can be well reduced.

Description

technical field [0001] The invention relates to structural wind-induced vibration control technology, in particular to an active suction flow control device for cylindrical structure wind-induced vibration. Background technique [0002] Because of the rationality of the cylindrical force, more and more structures or components adopt cylindrical or nearly cylindrical forms. More and more high-rise structures are in the form of approximately cylindrical shapes. The cross-section of chimneys used in power plants, smelters and other industries is mostly circular. Due to technological and environmental protection requirements, chimney structures are generally taller and softer, and are wind-sensitive structures. Structural components such as the poles of the platform also mostly adopt circular cross-sections. [0003] The circular section is prone to vortex-induced vibration under the action of wind load, and there are both across-wind and downwind responses, and the cross-wind ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/98E02B17/00
CPCE02B17/0017E04B1/98
Inventor 陈文礼李惠
Owner HARBIN INST OF TECH
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