Anti-vibration structure based on phononic crystal theory

Abstract

The invention discloses an anti-vibration structure based on a phononic crystal theory. The structure comprises a plurality of concrete row piles which are regularly distributed and arranged between avibration source and a sensitive building in an array mode, and elastic fillers arranged between two adjacent concrete row piles; a three-dimensional phononic crystal structure is formed between theconcrete row piles and the elastic fillers; in the phononic crystal structure, the elastic fillers are used for forming cells; and the concrete row piles are used for forming scatterers in the periodic cells. According to the anti-vibration structure based on the phononic crystal theory, by the adoption of the anti-vibration structure, the three-dimensional photonic crystal structure is constructed through the photonic crystal theory, conversion from a Rayleigh wave mode to a transverse wave mode is achieved through vertical resonance, and the characteristic that the structure has low transmission and high reflection on elastic waves is utilized, so that the damage effect of seismic wave surface waves is reduced, the function realization and the service performance of a protected object are not be threatened by structural failure, the structure is simple, the manufacture and the installation are convenient, the shock absorption and the vibration isolation effects are good, and the structure is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of shock absorption and isolation of buildings and engineering structures, in particular to an anti-vibration structure based on phonon crystal theory. Background technique [0002] With the development of science and technology, China's modern transportation facilities such as high-speed railways, expressways, subways and light rails are rapidly popularized. Correspondingly, the vibration problems caused by the above-mentioned transportation facilities have also attracted widespread attention in the engineering field. At the same time, the vibration problem caused by construction activities such as machine vibration, blasting and piling has become more and more serious, which has brought a lot of inconvenience to people's daily life. Therefore, improving the vibration isolation effect of various vibration isolation facilities is of great significance to people's production and life. [0003] Row pile is a ...

AI Technical Summary

Problems solved by technology

Using the existing vibration isolation methods, the main problems are: First, the periodic vibration isolation piles use the Bragg band gap to block the propagation of elastic waves. Due to the limitations of the stratum and concrete materials and the layout scale, it is difficult to achieve low-frequency elastic waves. Effective control

The second is that under the action of a small earthquake load, the spring on the top of the building can only exert its vibration isolation effect when its own displacement is at a low level. Once it bears an excessive shear force, the overturning of the spring will be extremely unfavorable to the building. Impact

The third is that buildings or engineering structures are often unable to undergo major changes due to their own functions to meet the needs of vibration reduction and earthquake resistance

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