Wind-induced vibration test device for super-long sling aeroelastic model in natural wind field

Abstract

The invention provides a wind-induced vibration test device for a super-long sling aeroelastic model in a natural wind field, and belongs to the technical field of suspension bridge or arch bridge sling wind-induced vibration test research in bridge wind resistance design. The device can be used for carrying out the wind-induced vibration test of the super-long sling aeroelastic model in a good natural wind field, compared with a traditional wind tunnel test method, the test device does not need large wind tunnel equipment, energy consumption is low, the size of the test model is not limited by the size of a wind tunnel, and a super-large proportion aeroelastic model test can be carried out; compared with real bridge observation, the device is convenient to carry out actual measurement research on cable force and vibration under different parameter conditions, and is beneficial to comprehensively researching the wind resistance of the sling under different wind field conditions and tower column aerodynamic interference. The wind-induced vibration test device for the ultra-long sling aeroelastic model developed in a natural wind field is provided for overcoming the defects of research on sling wind-induced vibration through a wind tunnel test and an on-site actual measurement method, and has relative advantages and characteristics.

Description

technical field [0001] The invention belongs to the technical field of wind-induced vibration test research of suspension bridges or arch bridges in wind-resistant design of bridges, and relates to an aeroelastic model wind-induced vibration test device for super-long suspension cables in a natural wind field. Background technique [0002] With the increasing span of suspension bridges and arch bridges, the structure is softer, the damping is reduced, and the bridge structure is more sensitive to the action of wind. The sling, also known as the suspender, is a component that transmits the live load and the dead load on the stiffened beam to the main cable or arch rib, and its service safety must be guaranteed. Long slings have low frequency and small damping, and may cause large vibrations under wind loads, which may affect driving comfort and even cause fatigue damage. Therefore, it is particularly important to study the wind resistance of slings. In the past, wind-induced...

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Problems solved by technology

Only a few large-scale wind tunnels (wind tunnel width greater than 10m) can carry out aeroelastic model tests conveniently. However, the scale of the model (less than 1:20, or even 1:50) is still small, which is quite different from the actual suspension bridge cable size

Although the actual bridge field measurement can obtain the most practical characteristics of the wind-induced vibration of the suspension cable, it is inconvenient to carry out the actual measurement research of the cable force and vibration under the conditions of different parameters (length, mass, damping ratio, surface roughness, etc.) controllability

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