An electromagnetically tuned mass damper and its design method

Abstract

The invention provides an electromagnetic tuned mass damper and a design method thereof, and belongs to the field of energy dissipation and vibration attenuation in civil engineering. A mass block is arranged above an I-shaped support and is connected with the I-shaped support through a plurality of springs, a negative pole and a positive pole of a permanent magnet are respectively fixed on the outer sides of two flanges of the I-shaped support, two racks are respectively and fixedly connected with the two sides of the mass block, each rack is meshed with an inner wheel of a dual-layer horizontal gear on the side of the rack, a plurality of single-layer gears are mutually connected in series and are meshed with outer wheels of the dual-layer horizontal gear, the dual-layer horizontal gear and the single-layer gears are connected to a web area of the I-shaped support through bearings, and a coil is fixedly connected with the single-layer gears, located between the two magnetic poles of the permanent magnet and connected with an energy acquisition circuit. The vibration of the mass block is converted into the rotation of a rotor in an electromagnetic element through a transmission device, the electromagnetic damping provided by the electromagnetic element replaces a viscous liquid damper in the existing tuned mass damper, and the defects of short service life and insufficient stability of the existing tuned mass damper are overcome.

Description

technical field [0001] The invention belongs to the technical field of shock absorption of civil engineering structures, in particular to an electromagnetic tuning mass damper and a design method thereof, which are used in bridge engineering or high-rise structures. Background technique [0002] Bridges are large, complex structures. Its static and dynamic characteristics, including space internal force calculation, stability, vibration, wind and earthquake response, etc., will bring great harm if not solved properly in the design of the bridge. In recent years, bridge vibration problems have attracted much attention: such as excessive vibration caused by train speed increase on the basis of existing railway bridges, urban noise pollution caused by vibration of urban track viaducts, wind-induced vibration of long-span bridge towers and cables And other issues. [0003] Bridge vibration control methods can be divided into active control and passive control. Since many probl...

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Problems solved by technology

[0006] The invention proposes an electromagnetic tuning mass damper, which converts the vibration of the mass block into the rotor rotation in the electromagnetic element through the transmission device, and replaces the viscous liquid damper in the existing tuning mass damper with the electromagnetic damping provided by the electromagnetic element , Overcoming the disadvantages of short service life and insufficient stability of existing tuned mass dampers

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