Three-dimensional phonon functional material structure comprising resonance units and manufacturing method thereof

Abstract

The invention relates to a three-dimensional phonon functional material structure comprising resonance units and a manufacturing method of the three-dimensional phonon functional material structure, which belongs to the field of acoustic materials and the like and overcomes the defect that the existing porous material structure is difficult to generate a complete band gap. The material structure is formed by arranging the resonance units according to simple cubic lattices. The manufacturing method of the material structure comprises the following steps of: making first to Nth layers of closed honeycomb materials comprising the resonance units which are arranged in a square lattice mode; and fixedly connecting the layers to form the three-dimensional phonon functional material structure comprising the resonance units which are arranged in the simple cubic lattice mode. Each resonance unit is formed by a mass block arranged in each honeycomb, one to six connecting bodies, a honeycomb wall and parts of honeycomb core upper and lower flat plates on and under each honeycomb. N is greater than or equal to 5. According to the material structure, the complete band gap can be generated; the width and the position of the band gap can be regulated by regulating the shape of the structure, the geometric dimensioning of the structure and the number of the connecting bodies; and the requirements of different acoustic characteristics are met.

Description

technical field [0001] The invention belongs to acoustics and relates to the fields of machinery, condensed matter physics, mechanics, material science and the like. Background technique [0002] Since the concept of phononic crystals was proposed in 1993, the research on phononic crystals has attracted extensive attention of scholars. Phononic crystal is a kind of acoustic bandgap functional material formed by periodic arrangement of two or more materials. A typical property of phononic crystals is the generation of phononic bandgap, that is, the propagation of elastic waves in a certain frequency range is suppressed. Using the bandgap characteristics, it is possible to design a completely vibration-free working environment within a certain frequency range, and to design and manufacture new types of sound insulation and noise reduction materials; it is also possible to control the propagation of elastic waves by designing its periodic structure. Therefore, phononic crysta...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiency that the existing structure is difficult to produce a complete band gap

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