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Photonic crystal damping material plate

A technology of phononic crystals and damping materials, which is applied in the direction of lamination devices, laminations, and layered products, etc., can solve the problems of phononic crystals controlling low frequencies, achieve convenient use, reduce the risk of first-order resonance, and improve comfort. and safety effects

Active Publication Date: 2019-02-19
LIUZHOU XINGTA IND & TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in terms of vehicles, there is no research report on the use of phononic crystals to control low frequencies

Method used

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  • Photonic crystal damping material plate
  • Photonic crystal damping material plate
  • Photonic crystal damping material plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Assuming that a 0.5mm thick aluminum sheet is selected to manufacture the phononic crystal structure layer, the mass unit is circular with a diameter of 35mm; when the length of the elastic unit is 15mm and the width is 5mm, the hole diameter is 45mm, and the phononic crystal structure layer unit is arranged in 4 holes with a distance of 20mm and magnetic The thickness of the damping layer is 1.5mm, and the thickness of the hot-melt damping layer is 1mm. In this state, the equivalent mass of the phononic crystal structure layer is 1.41g, the equivalent stiffness of the phononic crystal structure layer is 112233.47N / m, and the band gap frequency is 45Hz.

Embodiment 2

[0039] In the overall design state of Example 1, by adding 0.9g of aluminum sheet (thickness 0.5mm) to the mass unit, the equivalent mass is 2.31g, the equivalent stiffness is 112233.47N / m, and the forbidden band frequency is 35Hz .

Embodiment 3

[0041] In the overall design state of Example 1, by adding 1.1g of aluminum sheet (thickness 0.5mm) to the mass unit, the equivalent mass is 2.51g, the equivalent stiffness is 112233.47N / m, and the bandgap frequency is 34Hz.

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Abstract

The invention discloses a photonic crystal damping material plate, comprising a damping layer and a photonic crystal structural layer. The damping layer is made by combining a hot melt damping layer and a magnetic damping layer; the damping layer is provided with a plurality holes; the photonic crystal structural layer is embedded between the hot melt damping layer and the magnetic damping layer and is, in the holes, parallel to the damping layer. The photonic crystal structural layer is made by connecting mass units and elastic units; the elastic units are embedded between the hot melt damping layer and the magnetic damping layer; both the mass units and the elastic units are arranged in the holes and are parallel to the damping layer. Photonic crystal material is used herein for the first time in the field of automobiles to control first-order resonance of an automobile body; the photonic crystal damping material and an existing damping material are applied in parallel and are seamless butted; the photonic crystal damping material is applied practically for the first time; the requirement on low frequency in automobile damping denoising project design is met; the application blank for low-frequency damping materials is filled.

Description

technical field [0001] The invention belongs to the field of automobile shock-absorbing and noise-reducing engineering material preparation, and in particular relates to a phononic crystal damping material plate. Background technique [0002] Resonance refers to the situation where a physical system vibrates at a specific frequency with a larger amplitude than other frequencies. These specific frequencies are called resonance frequencies. The harm caused by resonance is also well known. For example, the collapse of the Mann River Bridge was caused by the first-order resonance. Similarly, the first-order resonance also has a destructive effect on the structure of the car body. However, traditional damping materials have very little effect on the first-order control of the vehicle body. [0003] Phononic crystals are a new type of functional material formed by elastic solids periodically arranged in another solid or fluid medium. At present, in terms of vehicles, there is no...

Claims

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Application Information

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IPC IPC(8): B32B3/24B32B3/04B32B15/20B32B15/04B32B33/00B32B37/10B32B37/06
CPCB32B3/04B32B3/266B32B15/04B32B15/20B32B33/00B32B37/06B32B37/10B32B2307/56B32B2605/08
Inventor 徐丰辰缪智刚
Owner LIUZHOU XINGTA IND & TRADE
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