Television tower vibration damping device and preparing and using method thereof

Abstract

Disclosed is a television tower vibration damping device. The television tower vibration damping device comprises a cylindrical metal box fixedly installed in the center of the top of a television tower. A high damping spring made of martensite shape memory alloy is hung in the center of an inner top plate of the metal box. A solid steel ball is tied at the lower end of the high damping spring. Elastic adhesive tape is stuck on the inner side wall of the metal box. According to the vibration damping device, under the action of external excitation, the high damping spring is damped through inner resonance of an oscillating mode and a vibration mode of the high damping spring and restoring force of the high damping spring when the solid steel ball and the box do not collide; when the solid steel ball collides with the box under the action of dynamic load, damping is conducted through impact force work of the box on the solid steel ball; and the mass ratio of the solid steel ball to the television tower is 0.01-0.02, the inner diameter and height of the metal box and the length and strength of the high damping spring are obtained according to given calculation formulas, and the vibration damping effect can be made to reach the best.

Description

technical field [0001] The invention relates to a high-flexible structure of a building, in particular to a TV tower vibration damping device for reducing vibration of a TV tower and a preparation and use method thereof. Background technique [0002] TV towers used for signal transmission and city sightseeing will produce dynamic responses under wind loads and earthquakes, and even collapse in severe cases. Vibration reduction for TV towers is an important measure to ensure their structural safety. [0003] CN102936926A patent document discloses a multi-dimensional collision energy-consuming mass pendulum damper that can be used for vibration reduction of transmission towers. The damper is composed of a mass ball suspended in a metal cylinder with a lower opening through a steel cable. Viscoelastic materials are attached to the inner wall of the metal cylinder, and the mass ball is used to generate inertial force to collide with the metal cylinder under the action of an exte...

AI Technical Summary

Problems solved by technology

[0005] (1) The mass ball suspended by the steel cable does not have internal resonance characteristics, and only the inertial force generated by the vibration of the mass ball is used for vibration reduction, and the vibration reduction effect is not good

[0006] (2) The relationship between the design parameters and the relevant technical parameters of the main structure when the damper achieves the best vibration reduction effect is not given, and the designed device cannot be guaranteed to achieve the best vibration reduction effect

[0007] (3) The lower end of the damper is open, and the steel cable, mass ball and viscoelastic material layer are easily corroded and have poor durability

[0009] (1) Electromagnetic induction is used to consume energy, and the structure of the mass block is complicated; the permanent magnet will demagnetize after long-term use, which will affect the energy consumption and vibration reduction effect of the vibration reduction device

[0010] (2) The relationship between the design parameters and the relevant technical parameters of the main structure when the device achieves the best vibration reduction effect is not given, and it cannot be guaranteed that the designed device will achieve the best vibration reduction effect

[0011] (3) Under the action of external excitation, the mass block may collide with the side of the box, which may cause damage to the device in severe cases

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