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Vibration damper for photonic crystal with adjustable cell property period array

A technology of phononic crystals and periodic arrays, which is applied in the direction of shock absorbers, springs made of plastic materials, shock absorbers, etc., can solve the problems of phononic crystal passband frequency height attenuation, fixed lattice size, etc. Achieve the effects of adapting to a wide range of frequency bands, enhancing vibration reduction efficiency, and good vibration control effects

Inactive Publication Date: 2015-03-04
HOHAI UNIV
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Problems solved by technology

In addition, Ali Belk et al. studied a viscoelastic phononic crystal (CN101952882A) by using an air matrix and rubber inclusions. The passband frequency of this composite phononic crystal is significantly attenuated and weakened, but the constant viscoelastic coefficient and lattice size can only be obtained with a fixed bandgap characteristic
Phononic crystals are widely used in vibration reduction and noise reduction and acoustic rectification, but their material properties and lattice size are fixed, so it is necessary to expand the application of phononic crystals in combination with magnetorheological smart materials

Method used

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  • Vibration damper for photonic crystal with adjustable cell property period array
  • Vibration damper for photonic crystal with adjustable cell property period array
  • Vibration damper for photonic crystal with adjustable cell property period array

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0018] Such as figure 1 As shown, the present invention is a phononic crystal vibration damping device with adjustable periodic array of cell properties, including a rigid magnetic permeable ring (rod) (1), a cell excitation coil (2), a magnetorheological elastomer (3 ), supporting plate (4), magnetic isolation plate (5), magnetic plate (6), single cell arrangement array (7), rigid magnetic ring (rod) (1), cell excitation The coil (2), the magnetorheological elastomer (3), the magnetic isolation plate (5), the magnetic conduction plate (6) and the support plate (4) surround the same symmetrical center to form a single cell; the rigid guide The magnetic ring (rod) (1) and the cell excitation coil (2) together form a scatterer, and the cell excitation coil (2) seamlessly wraps around the outer surface of the rigid magnetic ring (rod) (1), and the cell excitati...

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Abstract

The invention relates to a vibration damper for a photonic crystal with an adjustable cell property period array. According to the vibration damper, the influence of a photonic crystal weak joint interface (or interface layer) on a band gap is considered, the controllability of physical and mechanics parameters under magnetorheological elastomers field conditions is utilized, an appropriate mechanism is built, and a controllable cell material physical property and interface layer geometrical parameters are obtained, so that the random vibration control photonic crystal variable band gap range suitable for multiple working condition control structure system obtained in a photonic crystal mechanism is realized, and the vibration damping efficiency of structural vibration control is improved.

Description

technical field [0001] The invention relates to a vibration damping device of a cell periodic array intelligent material, which belongs to the field of vibration control. technical background [0002] The vibration reduction technology of structures under multi-working conditions is an important research direction in the fields of precision instruments, aerospace, multi-span bridges and special structures. Periodic structure vibration reduction is a new type of vibration reduction method at present. The propagation of elastic waves in periodic structures has the dispersion characteristics of pass band and forbidden band, that is, there is no elastic wave eigenmode in a specific frequency band in periodic structures. Periodic structures are also known as phononic crystals. According to this characteristic of the periodic structure, many scholars changed its constituent materials (such as density and elastic modulus, etc.), geometric parameters (such as cell constant, scatter...

Claims

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Application Information

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IPC IPC(8): F16F1/36F16F9/53
CPCF16F1/36F16F9/53
Inventor 杜成斌李润璞于国军郭斐李开春赵文虎陈小翠
Owner HOHAI UNIV
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