Vibration reduction power generation device for stay cable of cable-stayed bridge

Abstract

The invention provides a vibration reduction power generation device for a stay cable of a cable-stayed bridge, and belongs to the technical field of bridge engineering. A vibration reduction power generator and a power storage device in the device are both mounted on a base; the vibration reduction power generator comprises a shell and a vibration reduction power generation unit arranged in the shell. The vibration reduction power generation unit comprises an inductance coil vertically and evenly wound in the shell, a magnet located in the inductance coil and an internal spring connected with the magnet and the bottom of the shell. The magnet is connected with the bottom end of the connecting rod; the displacement amplifying device is hinged to the inhaul cable, the part located above the inhaul cable is connected with the inhaul cable through the shock absorber, and the part located below the inhaul cable is connected with the top end of the connecting rod and the inhaul cable through the spherical hinge connecting device and the spherical hinge spring. According to the invention, the functions of high-efficiency vibration reduction and power generation can be realized at the same time, the problem that the vibration reduction effect is not ideal due to the limitation of the installation height of a current damper is effectively solved, and the problems of high power supply cost and instability of a health monitoring sensor are effectively solved, so that the cable-stayed bridge is safer and more environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a vibration-damping power generation device for cable-stayed cables of cable-stayed bridges. Background technique [0002] Cable-stayed cables are one of the main stress-bearing components of cable-stayed bridges. Due to the characteristics of large flexibility, small mass and small damping, cables are prone to various forms of large-scale vibrations. Cable vibration will not only cause cable fatigue damage, but also make people doubt the safety of the bridge. Therefore, there are many researches on the vibration reduction of cables. The high-damping rubber damper has a simple structure and is easy to install, but the damping provided by the rubber ring is limited, so the damping effect is not ideal; the damping provided by the oil pressure damper exceeds that of the rubber damper, but its mechanical structure is complicated. The insensitivity to tiny vib...

AI Technical Summary

Problems solved by technology

The high-damping rubber damper has a simple structure and is easy to install, but the damping provided by the rubber ring is limited, so the damping effect is not ideal; the damping provided by the oil pressure damper exceeds that of the rubber damper, but its mechanical structure is complicated. The insensitivity to tiny vibrations makes it troublesome to install and adjust. Since the damping medium of the oil pressure damper is liquid, oil leakage and oil seepage are prone to occur, and its maintenance cost is relatively high; viscous shear dampers are more sensitive to tiny vibrations. It is relatively easy to install and adjust, but its disadvantage is that the damping it can provide depends heavily on the ambient temperature and vibration frequency

[0003] In the prior art, due to space constraints and device installation requirements, the installation height of the vibration damping device is limited, and usually it can only be installed near the end of the cable

However, during the vibration process of the cable, the vibration amplitude at the mid-span is relatively large, and the vibration amplitude at the end is usually small. Therefore, this type of damping device does not work well, and the vibration damping effect on the cable is limited.

In addition, when monitoring the cables, some health monitoring sensors need to be powered. If long-distance wiring is used for power supply, the cost is high and the wiring is complicated; if battery power is used, the battery needs to be replaced frequently. Higher; solar energy can also be used to supply power to the sensor, but this method is extremely susceptible to environmental influences, and the sensor cannot be powered normally under cloudy conditions; the temperature difference energy can be converted to power the sensor, and this method is suitable for use in environments with large temperature differences in winter , when the temperature difference in other seasons is small, the generated electricity cannot make the sensor work normally

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