Three-dimensional swing ball type tuned mass damper

Abstract

The invention relates to a three-dimensional swing ball type tuned mass damper. A buffer material blocks a transfer path of a vertical vibration load between a bracket and a precise device, a swinging ball spatially moves in a spherical groove of a rubber base for absorbing horizontal vibration energy of the bracket, the rubber base made of a high-damping material is collided so that three-dimensional kinetic energy of the swinging ball can be buffered and dissipated, the radiuses of the spherical groove and the swinging ball of the rubber base are designed according to the vibration frequency of the bracket so that the purpose of resonance is achieved, the vertical vibration of the bracket can be effectively reduced, the planar vibration can also be remarkably decreased, ad thus the spatial vibration of the precise device on the bracket is remarkably reduced, and the normal working of the precise device is kept. The whole three-dimensional swing ball type tuned mass damper has the advantages f good stability and durability, long service life, simple and compact structure, convenience for processing, manufacturing and installing, and high adaptability, and can be widely applied to vibration damping of various precise instrument devices arranged on the light bracket.

Description

Technical field [0001] The invention belongs to the field of engineering structure and instrument equipment vibration reduction, in particular to a three-dimensional pendulum ball type tuned mass damper. Background technique [0002] A large number of precision instruments and equipment such as video surveillance, radio signal acquisition, and transmission are installed on the roadbeds and bridges along expressways and high-speed railways. Most of these equipment are installed on light-weight pillar or gantry steel supports. Excited by dynamic loads such as wind loads, heavy vehicles, high-speed trains, etc., the light steel bracket will produce high-frequency vibration, and the high-frequency vibration of the bracket will first affect the precision of video surveillance, radio signal acquisition, transmission, etc. installed on it. The normal operation of instruments and equipment may even cause damage to precision electronic circuits and equipment scrapping, endangering driving...

AI Technical Summary

Problems solved by technology

Under the excitation of dynamic loads such as wind loads, heavy vehicles, and high-speed trains, light steel brackets will generate high-frequency vibrations, and the high-frequency vibrations of the brackets will first affect precision equipment such as video surveillance, radio signal acquisition, and transmission installed on it. The normal operation of instruments and equipment may even lead to damage to precision electronic circuits, equipment scrapping, and endanger driving safety. At the same time, vibration stress will also affect the use of steel brackets, which will lead to fatigue fracture of components and collapse of brackets in the long run, endangering driving safety on the line.

[0003] At present, domestic precision instruments and equipment and their supports on highways and high-speed railways mainly adopt conventional vibration reduction measures, such as setting elastic washers on anchor nuts, etc. Such vibration reduction measures can only play a certain role in the vertical direction. Cushioning effect, but there is no damping function for the horizontal vibration generated by the bracket

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