A maglev intelligent control cable damping device and damping adjustment method

Abstract

The invention discloses a magnetic suspending type intelligent control stay cable damping device and a damping adjustment method, and relates to the field of bridge damping device. The device comprises an upper connection rod, a lower connection rod, a connection plate and a displacement sensor, wherein a first iron core is arranged at one end of the upper connection rod, and a first coil is wound on the first iron core; the lower connection rod is arranged to be opposite to the upper connection rod, a second iron core is arranged at one end of the lower connection rod, the second iron core and the first iron core are oppositely arranged, and a second coil is wound on the second iron core; the connection plate is arranged on a bridge surface and connected with the lower connection rod; the displacement sensor is fixedly arranged on the connection plate and connected with the first iron core via a stay wire, and can be used for monitoring displacement of the first iron core. The magnetic suspending type intelligent control stay cable damping device provided by the invention omits a complex piston oil cylinder structure, and is simple in structure and convenient to manufacture, and meanwhile no mechanical wearing occurs, so that duration and service life of the device are improved.

Description

technical field [0001] The invention relates to the field of bridge damping devices, in particular to a maglev intelligent control stay cable damping device and a damping adjustment method. Background technique [0002] In the comparison and selection of long-span bridge schemes, cable-stayed bridges have a significant advantage in the number of advantages. Due to the characteristics of large flexibility, small mass and small damping, the cables of long-span cable-stayed bridges can easily cause vibrations that affect the health and safety of the bridge under the excitation of wind and traffic loads, and some amplitudes even reach 1m. The vibration of the stay cables will cause fatigue damage, lead to the damage of the end structure of the stay cables, greatly shorten the fatigue life of the stay cables themselves, and ultimately affect the safety of the bridge. Therefore, damping devices are generally installed on bridge stay cables for vibration reduction. [0003] At pr...

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Problems solved by technology

[0006] 1. The hydraulic piston cylinder still needs to be used in the existing magneto-rheological damper. The structure of the device is complicated, and its manufacture and installation require precision machining, which is costly;

[0007] 2. The existing magneto-rheological damper still needs to use a hydraulic piston cylinder, and there is a large mechanical wear between its internal components during use, which affects the durability and service life of the device;

[0008] 3. Although the existing magneto-rheological damper can be actively controlled by changing the damping, there is a certain response delay due to the constraints of the equipment, and it cannot accurately give the most suitable damping force in real time

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