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Novel bridge vortex-induced resonance control system and control method thereof

A vortex-induced resonance and control method technology, which is applied in bridges, bridge parts, bridge construction, etc., can solve problems that affect the safety performance and service performance of bridge structures, component strength damage, fatigue damage, etc., and achieve simple structure and prevent vortex-induced resonance. Resonance, the effect of changing the characteristics of the flow field

Inactive Publication Date: 2017-08-11
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although vortex vibration will not cause catastrophic damage to bridges like flutter, its low wind speed and high frequency will cause strength damage or fatigue damage to components, affecting the safety and performance of bridge structures. growing, it can be expected that vortex-induced vibration of bridges will receive increasing attention and will become a major form of self-excited vibration that must be controlled

Method used

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  • Novel bridge vortex-induced resonance control system and control method thereof
  • Novel bridge vortex-induced resonance control system and control method thereof
  • Novel bridge vortex-induced resonance control system and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A new bridge vortex-induced resonance control system mainly includes an array of turbulence devices 1, fans 9, and sensors 10. The turbulence devices 1 are installed on both sides of the main girder 11, and the fans 9 are installed on the turbulence devices 1. Each set of turbulence devices is a separate entity, and multiple sets of turbulence devices can be installed on the side of the main girder according to the length of the main girder and the action of the wind load. Each set of turbulence devices 1 is equipped with two fans 9 and 9 Connected to the fan controller (not shown in the figure), the sensor 10 is installed in the middle of the two sides of the main beam 11, the fan 9, the sensor 10, and the fan controller are all powered by the power supply device 12, and the power supply device 12 is installed on the The side bottom surface of the main beam 11 is close to the end.

[0025] The turbulence device includes a housing 1a, a mounting plate 2, an air inlet ar...

Embodiment 2

[0028] A new bridge vortex-induced resonance control system mainly includes an array of turbulence devices 1, fans 9, and sensors 10. The turbulence devices 1 are installed on both sides of the main girder 11, and the fans 9 are installed on the turbulence devices 1. Each set of turbulence devices is a separate entity, and multiple sets of turbulence devices can be installed on the side of the main girder according to the length of the bridge and the action of wind loads. Each set of turbulence devices 1 is equipped with three fans 9, and the fans 9 are connected to each other. To the fan controller (not shown in the figure), the sensor 10 is installed in the middle of the two sides of the main beam 11, the fan 9, the sensor 10, and the fan controller are all powered by the power supply device 12, and the power supply device 12 is installed on the main beam. The side bottom surface of the beam 11 is close to the end.

[0029] The spoiler includes a housing 1a, a mounting plate...

Embodiment 3

[0032] A new bridge vortex-induced resonance control system mainly includes an array of turbulence devices 1, fans 9, and sensors 10. The turbulence devices 1 are installed on both sides of the main girder 11, and the fans 9 are installed on the turbulence devices 1. Each set of turbulence devices is a separate entity, and multiple sets of turbulence devices can be installed on the side of the main girder according to the length of the bridge and the action of wind loads. Each set of turbulence devices 1 is equipped with four fans 9, and the fans 9 are connected to each other. To the fan controller (not shown in the figure), the sensor 10 is installed in the middle of the two sides of the main beam 11, the fan 9, the sensor 10, and the fan controller are all powered by the power supply device 12, and the power supply device 12 is installed on the main beam. The side bottom surface of the beam 11 is close to the end.

[0033] The spoiler includes a housing 1a, a mounting plate ...

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Abstract

The invention discloses a novel bridge vortex-induced resonance control system and a control method thereof. A main beam of a bridge is provided with a plurality of sets of turbulent flow devices and fans. The wind field information around the main beam is transmitted through sensors, and the fans are controlled, so that the wind field flowing directions and air speed around the main beam are changed, acting force of wind to the main beam section is relieved, the wind field air speed around the main beam is controlled, the vortex drifting speed in wind fields is increased, the vortex falling-off frequency is changed to be away from the inherent frequency of the bridge, and vortex-induced resonance of the main beam is prevented. The turbulent flow devices are simple in structure, convenient to mount, capable of being mounted on the side edges of the main beam in a large number, low in weight, free of burden to the bridge, good in turbulent flow effect and capable of effectively controlling vortex-induced vibration of the bridge and improving stability and safety of wind-induced vibration of the bridge.

Description

technical field [0001] The invention relates to the technical field of bridge wind resistance, in particular to a novel bridge vortex-induced resonance control system and a control method thereof. Background technique [0002] With the continuous improvement of bridge design theory and construction level, the span records of modern bridges are constantly being refreshed, and the upsurge of designing and building larger-span bridges is unfolding all over the world. The main problem brought about by the substantial increase in bridge span is the sharp drop in bridge stiffness, the structure is more slender and softer, and the natural frequency is lower. This makes the structure more sensitive to the wind, and the impact of wind-induced vibration on the safety performance and performance of the bridge is more prominent. Therefore, it is of great significance to find effective bridge wind vibration control methods. [0003] Among various wind-induced vibration problems, vortex-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00
CPCE01D19/00
Inventor 刘祖军贾明晓李树山李红梅
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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