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Active blowing control device for vibration damping and protection with cylindrical structure

A technology of air blowing control and cylindrical shape, which is applied in the direction of earthquake resistance, building components, protective buildings/shelters, etc., and can solve the problems of poor applicability of slender structures, achieve clear vibration reduction principles, reduce lift, reduce The effect of small pulsation pressure

Active Publication Date: 2020-09-01
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as: traveling wave wall, the disadvantage is that it is towering, and the applicability of slender structure is not strong, etc.

Method used

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  • Active blowing control device for vibration damping and protection with cylindrical structure

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Embodiment 1

[0009] combine figure 1 , a cylindrical structure vibration reduction and protection active blowing control device, including 2 groups or front blowing stagnation point 2, rear blowing stagnation point 3, air guide tube 4, blowing device 5, blowing device 5 and air guide tube 4 connections, the air guide tube 4 is respectively connected with the front blowing stagnation point 2 and the rear blowing stagnation point 3, the air guide tube 4 is arranged inside the cylindrical structure 1, and two groups of front blowing stagnation points are symmetrically arranged on the windward side and the leeward side respectively 2. Post-blowing stagnation point 3, each group of front-blowing stagnation point 2 and post-blowing stagnation point 3 are located in the same section, and the blowing direction of front-blowing stagnation point 2 and post-blowing stagnation point 3 is parallel to the direction of incoming flow ; The incoming flow acts on the aerodynamic shape formed by the airflow ...

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Abstract

The invention discloses an active blowing control device for vibration-attenuation protection of a cylindrical structure. The active blowing control device comprises one or more groups of front and back blowing stagnation points, an air guiding pipe and blowing equipment, wherein the blowing equipment is connected with the air guiding pipe, the air guiding pipe is connected with the front and backblowing stagnation points, respectively and is arranged in the cylindrical structure, one or more groups of front and back blowing stagnation points are respectively symmetrically distributed on a windward side and a leeside, each group of front and back blowing stagnation points are located on the same section, and the blowing directions of the front and back blowing stagnation points are parallel with the direction of an incoming flow; the incoming flow acts on an aerodynamic contour formed by airflow blowing from front stagnation points; and airflow blowing from back stagnation points is capable of breaking a vortex in a tail flow so as to preventing the tail flow from forming alternate-falling vortexes. The active blowing control device is simple in structure, the alternately generated vortexes in the tail flow can be broken, and the formation of tail flow vortexes can be prevented; and meanwhile, a flow field on a cylindrical surface is changed, so that the aerodynamic force on the surface of the cylindrical structure is reduced to a certain degree, and the wind-induced vibration of the cylindrical structure can be well reduced.

Description

technical field [0001] The invention relates to a structural wind-induced vibration control technology, in particular to an active air blowing control device for vibration reduction and protection with a cylindrical structure. Background technique [0002] Cylindrical structures are widely used in today's society. For example, the cross-section of chimneys in power plants, metallurgical plants and heating exhaust in Northeast China is mostly circular. Especially the stay cables in long-span bridges or the slings of suspension bridges are all cylindrical. The span length of these results is relatively long, so the structure becomes softer, the damping becomes smaller, the wind load is more sensitive, and the wind and wind effects will be more complicated. In particular, the wind effect of cable-stayed cables of long-span bridges is one of the most prominent dynamic effects of long-span bridges at present. How to reduce the wind load and the wind effect caused by wind load is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04H9/02E04B1/98E01D19/16
CPCE01D19/16E04H9/02
Inventor 陈文礼陈冠斌高东来李惠
Owner HARBIN INST OF TECH
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