Local resonance period structure with multiple stages of oscillators

Abstract

The invention belongs to the technical field of vibration noise control, and particularly relates to a local resonance period structure with multiple stages of oscillators, which comprises an elasticbase, a frame, an elastic column and a mass block, the elastic base and the surface overall mass of the elastic base form a primary resonance structure, the elastic columns and the mass blocks on theframe form a plurality of secondary sub-resonance structures, and the structures are periodically installed on the surface of a structure to be subjected to vibration suppression treatment. Through resonance of the vibrators of all orders, vibration energy is converted into kinetic energy of the vibrators of all orders, the vibration energy of the controlled structure is greatly dissipated, and therefore control over multi-frequency-band vibration is achieved. The invention aims to better adapt to the vibration reduction requirement in engineering by utilizing a multi-mode and wide-band design.

Description

technical field [0001] The invention belongs to the technical field of vibration and noise control, and in particular relates to a local resonant periodic structure with multiple-order oscillators. Background technique [0002] Vibration exists in various fields, and most of them are harmful vibrations. The vibration of instruments and equipment not only affects the accuracy of precision equipment, but also damages the equipment, reduces the normal service life of the equipment, and even directly causes the equipment to not be used normally; The surface spreads outward, causing damage to the walls of factories and nearby residents' houses; the driving of vehicles in the city, urban operations and daily life will generate a lot of vibration, and citizens are exposed to this environment for a long time, which can be annoying , accelerate physical fatigue, reduce work efficiency, and even endanger people's health in severe cases. At present, there are widely used methods for v...

AI Technical Summary

Problems solved by technology

[0002] Vibration exists in various fields, and most of them are harmful vibrations. The vibration of instruments and equipment not only affects the accuracy of precision equipment, but also damages the equipment, reduces the normal service life of the equipment, and even directly causes the equipment to not be used normally; The surface spreads outward, causing damage to the walls of factories and nearby residents' houses; the driving of vehicles in the city, urban operations and daily life will generate a lot of vibration, and citizens are exposed to this environment for a long time, which can be annoying , accelerate physical fatigue, reduce work efficiency, and even endanger people's health in severe cases

At present, there are widely used methods for vibration control: dynamic vibration absorption, vibration isolation, damping and vibration reduction, etc. However, due to the limitations of installation technology and installation space, traditional vibration reduction methods are often difficult to control low-frequency vibrations.

[0003] The local resonant periodic structure can generate a relatively low-frequency band gap, and the elastic wave will not be able to propagate within the band gap. Compared with the traditional vibration reduction method, it can truly realize the use of a small-sized structure to control the large-wavelength elastic wave. Domain resonant periodic structures often can only produce a single bandgap, and the low-frequency bandgap is narrow, so multi-mode and wide-bandgap designs are still required to better meet the vibration reduction requirements in engineering

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