Experimental device for acoustic metamaterial plate structure

A technology of acoustic metamaterials and experimental devices, applied in the direction of material analysis, measuring devices, and analytical materials using sound waves/ultrasonic waves/infrasonic waves, can solve problems that affect the accuracy of experimental data and lack of experimental devices, and achieve no prestress, Easy to operate and ensure the effect of accuracy

Active Publication Date: 2019-12-24
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the prior art lacks a dedicated experimental device in the process of dynamic experimental research on the acoustic metamaterial plate structure, thereby affecting the accuracy of the experimental data, the present invention further provides an experimental device for the acoustic metamaterial plate structure

Method used

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  • Experimental device for acoustic metamaterial plate structure
  • Experimental device for acoustic metamaterial plate structure
  • Experimental device for acoustic metamaterial plate structure

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Experimental program
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specific Embodiment approach 1

[0021] Specific implementation mode one: combine figure 1 with Figure 6 Describe this embodiment, an experimental device of an acoustic metamaterial plate structure in this embodiment, the experimental device includes a metamaterial plate 5, two clamp brackets 1, two positioning rods 6, two fixed pressure plates 7 and 2N connector, N is a positive integer;

[0022] The two clamp brackets 1 are relatively arranged on both sides of the metamaterial plate 5, and each fixed platen 7 is installed on the top of a clamp bracket 1, and a substrate 51 in the metamaterial plate 5 is arranged on the clamp bracket 1 and the fixed platen 7 between, and the metamaterial plate 5 is fixedly installed on the fixture bracket 1, each positioning rod 6 is arranged on one side of the two fixture brackets 1, and each positioning rod 6 is fixedly connected with the two fixture brackets 1, each The fixture bracket 1 is fixedly connected to the vibration-isolation foundation track through N connect...

specific Embodiment approach 2

[0024] Specific implementation mode two: combination Figure 6 with Figure 7 Describe this embodiment, this embodiment is to further limit the metamaterial plate 5 described in the first embodiment, in this embodiment, the metamaterial plate 5 includes two substrates 51 and Z straight rods 53, Z is Positive integer, two substrates 51 are arranged in parallel, Z straight rods 53 are evenly distributed between the two substrates 51, and one end of each straight rod 53 is fixedly connected to a substrate 51, and the upper surface of each substrate 51 is provided with several A vibration hole 52. Other compositions and connection methods are the same as those in Embodiment 1.

[0025] In this embodiment, the metamaterial plate 5 includes two substrates 51, one of which is arranged between the fixture bracket 1 and the fixed platen 7 for clamping and fixing, and the other substrate 51 is installed on the fixture bracket 1 to realize Double fixation ensures a more stable install...

specific Embodiment approach 3

[0026] Specific implementation mode three: combination Figure 3 to Figure 5 Describe this embodiment, this embodiment is to further limit the clamp bracket 1 described in the first embodiment, in this embodiment, the clamp bracket 1 includes a vertical plate 11 and a bottom plate 12, and the bottom surface of the vertical plate 11 is fixed on On the upper surface of the bottom plate 12, N through holes 121 are arranged on the end of the top surface of the bottom plate 12 away from the vertical plate 11, and each connector is arranged in a through hole 121, and the top surface of the vertical plate 11 is equidistantly arranged along the length direction. M threaded blind holes, M is a positive integer, the side of the vertical plate 11 away from the bottom plate 12 is provided with a connecting square bar 111, and the connecting square bar 111 is provided with a connecting groove 112, and another base plate 51 in the metamaterial plate 5 is arranged on the connection slot 112....

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Abstract

The invention discloses an experimental device for an acoustic metamaterial plate structure, and belongs to the technical field of structural elements. The problem that the accuracy of the experimental data is influenced due to the lack of dedicated experimental device in the process of performing dynamics experiment research on the acoustic metamaterial plate structure in the prior art is mainlysolved. Two clamp brackets are oppositely arranged at two sides of the metamaterial plate, each fixed pressing plate is arranged at a top of one clamp bracket, one substrate in the metamaterial plateis arranged between the clamp bracket and the fixed pressing plate, and the metamaterial plate is fixedly arranged on the clamp brackets; each positioning rod is arranged at one side of each of two clamp brackets, and each positioning rod is fixedly connected with two clamp brackets; and each clamp bracket is fixedly connected with a vibration-isolation foundation track through N connectors. The device is mainly used as an experimental device for testing the dynamic performance of the acoustic metamaterial plate structure.

Description

technical field [0001] The invention relates to an experimental device for an acoustic metamaterial plate structure, belonging to the technical field of structural elements. Background technique [0002] Engineering structures such as rods, beams, and plates are the main carriers that generate or transmit vibrations, and they are also the parts with more prominent vibration problems. The acoustic metamaterial structure is based on rods, beams, plates, etc., and the local resonance units are periodically arranged. It has significant elastic wave bandgap characteristics. By artificially adjusting the wave propagation, the structure can be effectively realized in the forbidden band frequency range. Internal vibration isolation. [0003] Compared with theoretical studies and numerical simulations, there are very few experimental studies on the dynamics of metamaterial structures, especially metamaterial plate structures. Dynamic experiments of acoustic metamaterial plate struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/22
CPCG01N29/045G01N29/223G01N2291/2632
Inventor 鄂林仲阳吴志静邹广平李凤明孙爱军杜强
Owner HARBIN ENG UNIV
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