Connecting method of variable cross-section phononic crystal elastic material

Abstract

The invention belongs to the field of functional materials and particularly provides a connecting method of a variable cross-section phononic crystal elastic material. The connecting method is characterized in that the variable cross-section phononic crystal elastic material consists of a copper block and a rubber column, the copper block and the rubber column are firstly bonded by using glue, then a copper pressure piece is added, and a bolt is further used for fixation, wherein the thickness of the copper pressure piece is 0.5mm-1mm, the outer diameter is 0.2mm smaller than a groove of the copper block, and the inner diameter is 0.2mm bigger than the rubber column. The connecting method adopts the glue bonding and simultaneously utilizes the pressure piece and the bolt to strengthen the bonding strength. Therefore, the bonding strength in the material is far larger than that of the traditional glue bonding method, thereby leading a phononic crystal to be capable of being applied in a plurality of vibration damping environments with high vibration strength.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular provides a connection method for variable-section phonon crystal elastic materials. Background technique [0002] People have made great progress in the research of photonic crystals. In view of the analogy between phononic crystals and photonic crystals, phononic crystals have gradually become a new research hotspot in the past ten years. An important feature of a phononic crystal is its acoustic bandgap, that is, a phononic crystal is a functional material or structure composed of two or more elastic media with periodic structure and elastic wave bandgap characteristics. When the elastic wave propagates in the phononic crystal, affected by its internal periodic structure, a special dispersion relationship (also called band structure) is formed, and the frequency range between the dispersion relationship curves is called the band gap. Theoretically, elastic wave propagation...

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Problems solved by technology

[0003] Variable cross-section phononic crystals can obtain band gaps with lower initial frequencies at smaller period sizes, making it possible for the practical application of phononic crystals in vibration and noise reduction. In order to ensure the continuity of displacement between materials, the current one-dimensional The connection of phononic crystal materials is made by glue bonding. Due to the insufficient bonding strength, the practical application of phononic crystals is greatly limited, especially in terms of vibration reduction.

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