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Broadband elastomer wave separation device based on five-mode material and design method thereof

A design method and elastic technology, applied in the field of broadband elastomer wave separation devices, can solve the problems of limiting the design of elastomer wave separation devices, affecting the application of longitudinal wave and shear wave engineering, and narrowing the working frequency band, so as to improve the value of engineering applications and avoid work. The effect of narrow frequency band and narrow operating frequency band

Active Publication Date: 2021-07-23
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, resonant metamaterials can only exhibit their characteristics near the resonant frequency, so they show a narrow operating frequency band and significant dissipation
These shortcomings greatly limit the design of elastomeric wave separation devices, thereby affecting the engineering applications of subsequent longitudinal and shear waves

Method used

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  • Broadband elastomer wave separation device based on five-mode material and design method thereof
  • Broadband elastomer wave separation device based on five-mode material and design method thereof
  • Broadband elastomer wave separation device based on five-mode material and design method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Design method of wide-frequency elastic body wave separation devices based on five-mode materials, including the following steps:

[0058] Step 1: In the engineering application, the background medium is mostly aluminum, steel and the like, so in two-dimensional conditions, in order to make the elastic body wave θ i Realize spatial separation, it is necessary to clarify the background medium elastic constant C 11 And C 66 , And density ρ, according to the following formula:

[0059]

[0060] Mode required to form a five-mode material that constitutes a two-dimensional elastic wave separator And density ρ S , Ρ S The target material parameter input is used as the optimization program of step two. The above formula (1) is a generalized longitudinal transmissive impedance matching condition.

[0061] Step 2: Using the five-mode material microstructure original single cells, optimized the design to meet the five-mode material cells (five-mode material microstructure) requir...

Embodiment 2

[0081] According to the above designs step, a five-mode material hexagonal single cell that satisfies the circumference condition is designed. Image 6 The split layer consisting of its macro Figure 7 Indicated. End them and background media into simulation software, Figure 8 Indicated. Figure 8It indicates that the longitudinal waves and horizontal waves from the same direction are incident to the dividing layer, and can continue to propagate in a direction perpendicular to each other.Further, the corresponding experimental test was carried out, and the measured experiment showed a good split effect in the range of 50-100 kHz (about 66.7%).The above simulation and experiments confirm the steps to follow this patent implementation, and can design a wide-frequency elastomer wave split device.

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Abstract

The invention provides a broadband elastomer wave separation device based on a five-mode material and a design method thereof. The design method comprises the following steps: 1, establishing a first model; 2, establishing a second model; 3, obtaining a two-dimensional five-mode material partial wave layer; 4, carrying out simulation modeling on the five-mode material partial wave layer, embedding the five-mode material partial wave layer into a background medium, simultaneously exciting longitudinal waves and transverse waves on one side of the partial wave layer, observing the separation state of the longitudinal waves and the transverse waves, and entering step 5 or step 3; 5, preparing a five-mode material wave division layer and a background medium sample piece; 6, placing a transducer and a sensor in the sample piece; 7, exciting a longitudinal wave and a transverse wave by using a transducer, and detecting longitudinal wave and transverse wave signals by using two sensors; and 8, adjusting the incident frequencies of the longitudinal wave and the transverse wave, repeating the step 7, recording a detection result, if the longitudinal waves and the transverse waves can be separated in a wide frequency range, completing the design of the elastomer wave separation device, otherwise, repeating the step 3 and the following steps.

Description

Technical field [0001] The present invention relates to the field of elastic wave regulation, and in particular, in particular, to a wide-rate elastic body wave separation device based on five-mode materials and its design methods. Background technique [0002] Longao and horizontal waves have very broad engineering application prospects due to their own unique fluctuation characteristics, such as longitudinal waves easy, fast wave velocity, can detect deformation caused by different excitation; transverse wave is non-resolution, high resolution, stronger penetration, Medical imaging, etc. However, different from fluid media can only propagate a polarized wave (e.g., acoustic wave), and the solid material can carry a variety of polarized waves due to its rich elastic modulus, which in turn leads to longitudinal waves and horizontal waves to be coupled together in space. This has caused difficulties in using longitudinal or horizontal wave alone. [0003] At present, the elastomer...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F113/26
CPCG06F30/23G06F2113/26Y02T90/00
Inventor 刘晓宁郑明晔赵炳昊胡更开
Owner BEIJING INSTITUTE OF TECHNOLOGYGY