Cylindrical eddy current damping device, damping regulation method and bridge vibration attenuation structure

Abstract

The invention discloses a cylindrical eddy current damping device, a damping regulation method and a bridge vibration attenuation structure, and relates to the technical field of vibration attenuationdevices. The damping device comprises a supporting frame, a mass block, an induction strong magnet, a straight line guide rail and a copper pipe, wherein the induction strong magnet comprises a firstinduction strong magnet and a second induction strong magnet; the copper pipe comprises a first copper pipe and a second copper pipe; the first induction strong magnet and the second induction strongmagnet are respectively arranged at two sides of the mass block; the first copper pipe and the second copper pipe are respectively arranged at two sides of the supporting frame; when the mass block vibrates, the first induction strong magnet and the second induction strong magnet respectively carry out reciprocating motion in the first copper pipe and the second copper pipe. According to the damping regulation method, the internal radius and the external radius of the copper pipe and the size of the induction strong magnet are regulated to realize different damping coefficients. The bridge vibration attenuation structure comprises the damping device. Through a Ferrari electromagnetic induction principle, the energy of structure vibration is adsorbed, and a damping proportionality coefficient can be conveniently regulated.

Description

technical field [0001] The invention relates to the technical field of damping devices, in particular to a cylindrical eddy current damping device, a damping adjustment method and a bridge damping structure. Background technique [0002] With the continuous development of materials and mechanical equipment technology, the span of bridges and other engineering structures is getting larger and larger, and the key support structures are getting higher and higher. Under the action of external dynamic loads such as earthquakes or strong winds, the structure will produce a relatively strong dynamic response. The rigidity of the structure is seriously reduced, and the fatigue and damage of the structure gradually accumulate, which eventually leads to the worsening of the safety and health of the structure. Structural vibration control can effectively reduce the response and damage accumulation of structures under the dynamic effects of wind, earthquake, and vehicles, and effectivel...

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Problems solved by technology

Generally, oil dampers are related to the problem of oil leakage; liquid grids are used to provide damping. When the required damping force is large, the damping effect is very small. In addition, there are certain problems in the stability of damping parameters, which affect the shock absorber. normal working performance; some researchers also use fluid-solid coupling vibration to completely separate mass parameters, stiffness parameters and damping parameters, so that although tuning is convenient, the damping proportional coefficient of this damper is not easy to change and adjust

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