Triangular lattice local resonance type photonic crystal structure
A technology of phononic crystals and triangular crystals, which is applied in the field of triangular crystal pattern domain resonance phononic crystal structures, can solve problems such as difficult application in the engineering field, difficult low-frequency band gap, etc., and achieve good local resonance characteristics.
Active Publication Date: 2021-07-09
WENZHOU UNIVERSITY
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Problems solved by technology
In the early stage of phononic crystal research, the mechanism of periodic structure bandgap in phononic crystals is mainly the Bragg scattering mechanism, in which the structural periodicity plays a leading role, and it is difficult to obtain low-frequency bandgap below 1kHz under the condition of small period size. As a result, it is difficult to have practical application in the field of engineering
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[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0033] as attached figure 1 , figure 2 , image 3 and Figure 4 As shown, a triangular lattice domain resonance type phononic crystal structure includes a body, and the body is composed of a plurality of rhombic unit cell structures with identical structures regularly arranged;
[0034] Each rhombus unit cell structure includes a rhombus frame 1, a rectangular scatterer 2, two groups of first elastic beams 3 and two groups of second elastic beams 4, and the rectangular scatterer 2 is embedded in the rhombic frame 1 In the middle, two sets of first elastic beams 3 and two sets of second elastic beams 4 are arranged as the connection structure between the rectangular scatterer 2 and the rhombus outer frame 1, and are arranged in a staggered and spaced manner around the center of the rectangular scatterer 2;
[0035] Each first elastic beam 3 includes a fir...
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The invention discloses a triangular lattice local resonance type photonic crystal structure, which comprises a body formed by regularly arranging a plurality of diamond unit cell structures with the same structure. Each diamond unit cell structure comprises a diamond outer frame, a rectangular scatterer, two groups of first elastic beams and two groups of second elastic beams, the rectangular scatterer is embedded in the middle of the diamond outer frame, and the two groups of first elastic beams and the two groups of second elastic beams are used as connecting structures between the rectangular scatterer and the diamond outer frame, and are arranged around the center of the rectangular scatterer in a staggered and spaced manner; and the diamond outer frame, the first elastic beams and the second elastic beams are made of epoxy resin, and the rectangular scatterer is made of steel. The triangular lattice local resonance type photonic crystal structure has the following advantages and effects that the triangular lattice photonic crystal structure has a good local resonance characteristic, a low-frequency wide forbidden band can be obtained through geometric parameter adjustment, and the photonic crystal structure can be better applied to the engineering field.
Description
technical field [0001] The invention relates to the technical field of phononic crystals, in particular to a triangular lattice domain resonance phononic crystal structure. Background technique [0002] As a new type of artificial structure with spatial periodicity and elastic band gap characteristics, phononic crystals have attractive application prospects in vibration control and noise isolation due to their unique physical properties. At present, most phononic crystals tend to have higher bandgap frequencies and narrower bandgap widths, which do not meet the requirements for wide bandgap at low frequencies for engineering applications, which severely limits their application in the field of vibration and noise reduction. How to obtain a phononic crystal structure with tunable low-frequency wide bandgap will be particularly important. [0003] In recent years, as a new type of acoustic functional material, phononic crystals can suppress the diffusion of noise and vibratio...
Claims
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Login to View More IPC IPC(8): G10K11/172
CPCG10K11/172
Inventor 向家伟马幸福
Owner WENZHOU UNIVERSITY