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Three-dimensional locally-resonant photonic crystal structure and preparation method

A phononic crystal and local resonance technology, which is applied in the field of local resonance phononic crystal structure and preparation, can solve problems such as difficulty in preparing complex three-dimensional phononic crystal structures, and achieves reduced structure size, reduced structure weight, and simple preparation. Effect

Inactive Publication Date: 2016-12-14
SICHUAN UNIV
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Problems solved by technology

[0005] In order to overcome the difficulty of obtaining low-frequency wide-bandgap under the requirements of miniaturization and light weight in existing structures, and solve the problem that traditional mechanical processing methods are difficult to prepare complex three-dimensional phononic crystal structures, the present invention provides a local resonance phononic crystal Structure and preparation method

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  • Three-dimensional locally-resonant photonic crystal structure and preparation method
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  • Three-dimensional locally-resonant photonic crystal structure and preparation method

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Embodiment Construction

[0028] The present invention will be described in more detail below in conjunction with the accompanying drawings and specific examples.

[0029] figure 1 (a) is the unit cell model of the phononic crystal structure, including core 1, cladding layer 2, and connector 3. Such as figure 1 As shown in (b), the unit cell contains six connectors 3 , and the central axes of the connectors 3 intersect with the center of the core 1 .

[0030] The core 1 and the cladding layer 2 form scattering units and are periodically arranged in a square lattice, and the scattering units are connected by connectors 3 to form a complete three-dimensional phononic crystal structure with a certain number of periods, such as figure 2 shown.

[0031] The preparation method of the present invention is specifically described in conjunction with the accompanying drawings, including the following six steps.

[0032] Step 1), the design of the structure size: the lattice constant is determined by the req...

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Abstract

The invention discloses a three-dimensional three-phase photonic crystal structure based on the local resonance mechanism. The structure is formed through the steps that high-density cores are uniformly coated with elastic coating layers to form scattering units, and the scattering units are periodically arranged in a square array mode and connected with one another through low-density hard connecting bodies. A preparation method is characterized by comprising the steps that a two-dimensional periodic structure composed of the connecting bodies and the coating layers is prepared through a 3D printing technique based on photocuring molding, and after the high-density cores are arranged in the coating layers, the two-dimensional periodic structure is stacked layer by layer and assembled to form the complete three-dimensional periodic structure. The structure and the preparation method thereof have the advantages that low-frequency acoustic wide band gaps are obtained while the structure size and the structure weight are decreased, and by applying the 3D printing technique based on photocuring molding, the multi-phase complex three-dimensional photonic crystal structure is easier and more flexible to prepare.

Description

technical field [0001] The invention relates to a local resonance phonon crystal structure and a preparation method, which belongs to acoustics and relates to the fields of solid physics, structural mechanics, material mechanics, additive manufacturing and the like. Background technique [0002] The mechanical vibration generated in the modern industrial production process not only causes fatigue damage to the mechanical structure, affects the performance of the equipment, but also causes errors in the precision machining and measurement process to reduce the accuracy. Therefore, it is extremely necessary to control vibration and suppress noise in the industrial production process. Phononic crystals are just such a new type of functional material that can be used for vibration and noise reduction. Its elastic wave bandgap characteristics can suppress the elastic wave transmission in a certain frequency range, so it can be used to construct a vibration-free working environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/172G06F17/50B33Y80/00
CPCB33Y80/00G06F30/20G10K11/172
Inventor 殷鸣江卫锋殷国富向召伟邓珍波
Owner SICHUAN UNIV
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