A low-frequency broadband nacre biomimetic vibration isolation material

Abstract

The invention discloses a low-frequency broadband nacre bionic vibration isolation material, which has a periodic structure, and the periodic structure is composed of a plurality of basic structural units; A connected structural layer, a connecting layer and a structural layer two; the connecting layer includes four secondary connecting layers arranged in a 2×2 matrix, and the four secondary connecting layers are arranged at equal intervals; the secondary connecting layer It includes a structural layer 3 and connecting layer 1 and connecting layer 2 respectively located on the upper and lower sides of the structural layer 3; the material of the structural layer 1, the structural layer 2 and the structural layer 3 is material 1, the The material of the connection layer one and the connection layer two is material two; the density of the material one is y mat , 1×10 3 kg / m 3 ≤y mat ≤20×10 3 kg / m 3 ; The modulus of elasticity of the material two is x mat , 0.1Mpa≤x mat ≤100Mpa. The basic structural unit of the present invention has a relatively wide low-frequency band gap, and the band gap can be designed.

Description

technical field [0001] The invention relates to a vibration isolation material, in particular to a low-frequency broadband nacre bionic vibration isolation material. Background technique [0002] The core of traditional vibration reduction technology is the use of damping and vibration reduction materials, such as rubber, resin and other materials. These materials are usually single-phase polymer materials or a mixture of several polymer materials. The polymer material is made of long, soft curly It is composed of entangled molecules, occasionally coupled with chemical bonds, and has a high damping coefficient. Damping is the process of converting the vibration energy of the system into other forms of energy during the vibration process and dissipating it. It can be dissipated through the internal friction between its internal polymers. Other forms of energy include thermal energy, electrical energy, magnetic energy, etc. Damping reduces the amount of vibration, impact and ...

AI Technical Summary

Problems solved by technology

[0004] Traditional damping and vibration-reducing materials are based on the internal friction energy dissipation mechanism. The effect of vibration reduction at low frequencies is not significant, and there is a problem that the target bandwidth frequency cannot be designed. For fields with different bandwidth frequencies, different types of materials need to be designed, and the vibration-reduction range cannot be covered. Vibration and wider acoustic frequency range

For special fields, the vibration reduction effect is required to be significant, and elastic waves in a specific frequency range can be shielded, such as the vibration-free processing environment required by high-precision processing systems, and the sound shielding environment in a specific frequency range. Traditional damping and vibration reduction materials are not competent.

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