Large-span bridge multi-order vortex vibration intelligent control system and method based on active air suction

An intelligent control system and large-span technology, applied in the direction of electrical program control, bridges, bridge parts, etc., can solve the problems of poor multi-order eddy vibration suppression effect and affect the bridge section characteristics, so as to improve the eddy vibration suppression effect, suppress The effect is good and the effect of improving the inhalation effect

Active Publication Date: 2020-12-01
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0006] The purpose of the present invention is to provide an intelligent control system and method for multi-order vortex vibration of large-span bridges based on active air suction, so as to solve the problems of poor multi-order vortex vibration suppression and affecting bridge section characteristics, etc.

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  • Large-span bridge multi-order vortex vibration intelligent control system and method based on active air suction
  • Large-span bridge multi-order vortex vibration intelligent control system and method based on active air suction
  • Large-span bridge multi-order vortex vibration intelligent control system and method based on active air suction

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Embodiment Construction

[0042] The technical solutions in the present invention are clearly and completely described below in combination with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] Such as Figure 1-4 As shown, the active suction-based multi-stage vortex intelligent control system for large-span bridges provided by the present invention includes a first suction mechanism 2, a second suction mechanism 3, a first exhaust pipe 4, a second Exhaust pipe 5, first air suction device, second air suction device, wind speed and wind direction sensor and control device; the upper web 103 and top plate 101 junctions on both sides of bridge 1 (horizontal) are provide...

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Abstract

The invention discloses a large-span bridge multi-order vortex vibration intelligent control system and method based on active air suction. When a detected wind speed reaches the wind speed at which vortex vibration is generated, the order of the generated vortex vibration is determined; a first air suction mechanism and a second air suction mechanism at corresponding positions of a windward sideare controlled to work according to the order of the vortex vibration; the first air suction device and the second air suction device begin to suck incoming wind; incoming wind is absorbed to form suction air flow on the windward side or a leeward side. Therefore, spanwise interference is formed in the spanwise direction of a box girder, the wind field on a bridge surface is interfered, and the formation of vortex shedding is avoided; and flow vortexes are formed at the upper edge, the lower edge and the lower web plate of a bridge, so that the spanwise correlation of wake vortexes is destroyed, the three-dimensional instability characteristic of wake flow in a vortex vibration process is excited, the vortex vibration response is weakened, the influence on the bridge is reduced, the fatigue damage of bridge components is avoided, and the influence on comfort is avoided.

Description

technical field [0001] The invention belongs to the technical field of bridge wind resistance, and in particular relates to an intelligent control system and method for multi-stage vortex vibration of a large-span bridge based on active air suction. Background technique [0002] In recent years, many long-span bridges across rivers and seas have been built at home and abroad, and their structural forms are mainly suspension bridges and cable-stayed bridges, such as Akashi Kaikyo Bridge, China Zhoushan Xihoumen Bridge, Sutong Bridge, Runyang Bridge, etc. For these long-span cable-supported bridges, as the span increases, the structural rigidity decreases significantly, so that wind load often becomes the control load, and wind-induced vibration also becomes the main factor that threatens the safety of the bridge. The damage caused by wind to bridges is multifaceted, among which vortex-induced vibration (referred to as vortex vibration) is the shedding of vortex when the air f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/04E01D19/00G01P5/00G01P13/02
CPCE01D19/00G01P5/00G01P13/025G05B19/04
Inventor 李春光韩艳毛禹胡朋罗颖董国朝
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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