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Micro-perforated corrugated-honeycomb metamaterial plate structure capable of improving sound insulation and absorption performance

A technology of metamaterials and plate structures, applied in the direction of sound-generating devices, instruments, layered products, etc., can solve the problems of limited mechanical and acoustic properties, poor sound insulation and sound absorption capacity, etc.

Active Publication Date: 2021-04-20
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of relatively limited mechanical properties and acoustic properties of traditional sandwich panel components, in engineering applications, the sound insulation and sound absorption capacity are relatively poor, and then Provide a micro-perforated corrugated-honeycomb metamaterial plate structure that improves sound insulation and absorption performance;

Method used

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  • Micro-perforated corrugated-honeycomb metamaterial plate structure capable of improving sound insulation and absorption performance
  • Micro-perforated corrugated-honeycomb metamaterial plate structure capable of improving sound insulation and absorption performance
  • Micro-perforated corrugated-honeycomb metamaterial plate structure capable of improving sound insulation and absorption performance

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specific Embodiment approach 1

[0025] Specific implementation mode one: refer to Figure 1 to Figure 8 This embodiment is described. This embodiment provides a micro-perforated corrugated-honeycomb metamaterial plate structure that improves sound insulation and absorption performance. The metamaterial plate structure includes a corrugated-honeycomb metamaterial sandwich plate and 4N local resonance mechanisms. N is a positive integer;

[0026] The corrugated-honeycomb metamaterial sandwich panel includes a top plate 1, N corrugated-honeycomb sandwich units and a bottom plate 6, and N corrugated-honeycomb sandwich units are periodically arranged between the top plate 1 and the bottom plate 6, and two adjacent The two corrugated-honeycomb sandwich units are separated by a partition, the top of each corrugated-honeycomb sandwich unit is fixedly connected with the lower surface of the top plate 1, and the bottom of each corrugated-honeycomb sandwich unit is connected with the upper surface of the bottom plate 6...

specific Embodiment approach 2

[0028] Specific implementation mode two: refer to Figure 1 to Figure 8 Describe this embodiment, this embodiment is to further limit the corrugated-honeycomb sandwich unit described in the first specific embodiment, in this embodiment, the corrugated-honeycomb sandwich unit includes corrugated sandwich 2 and honeycomb sandwich 3 ;

[0029] The honeycomb sandwich core 3 is a cross plate structure, and the corrugated sandwich core 2 includes four sets of right-angled triangular plates, each set of right-angled triangular plates is arranged in a quadrant in the honeycomb sandwich core 3, and two sets of right-angled triangular plates in each set of right-angled triangular plates The triangular plates are arranged symmetrically along the diagonals of the quadrants, and one side of each right-angled triangular plate in each group of right-angled triangular plates is fixedly connected with the top of the corresponding cross plate in the quadrant. The opposite apex connected to the...

specific Embodiment approach 3

[0031] Specific implementation mode three: refer to Figure 1 to Figure 8 Describe this embodiment. This embodiment is to further limit the local resonance mechanism described in the second specific embodiment. In this embodiment, each local resonance mechanism includes a mass block 4 and a rubber spring 5. The rubber spring 5 is arranged on the bottom plate 6 along the vertical direction, and one end of the rubber spring 5 is fixedly connected to the top surface of the bottom plate 6 , the mass block 4 is arranged on the rubber spring 5 , and the mass block 4 is fixedly connected to the other end of the rubber spring 5 . Other compositions and connection methods are the same as those in the second embodiment.

[0032] In this embodiment, the local resonance mechanism is attached to the bottom plate by applying the mass block 4 and the rubber spring 5 to form a new micro-perforated corrugated-honeycomb metamaterial plate structure based on the local resonance mechanism to impr...

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Abstract

The invention discloses a micro-perforated corrugated-honeycomb metamaterial plate structure capable of improving sound insulation and absorption performance, belongs to the technical field of engineering vibration and noise reduction, and aims at solving the problems that: the mechanical property and acoustic property of traditional sandwich plate type components are limited, and the sound insulation quantity and sound absorption capacity are poor in engineering application. The corrugated-honeycomb metamaterial sandwich plate comprises a top plate, N corrugated honeycomb sandwich units and a bottom plate, the N corrugated honeycomb sandwich units are periodically arranged between the top plate and the bottom plate, every two adjacent corrugated honeycomb sandwich units are separated through a partition plate, the top of each corrugated honeycomb sandwich unit is fixedly connected with the lower surface of the top plate, the bottom of each corrugated honeycomb sandwich unit is fixedly connected with the upper surface of the bottom plate, four local resonance mechanisms are periodically distributed between each corrugated honeycomb sandwich unit and the bottom plate, and each local resonance mechanism is fixedly connected to the upper surface of the bottom plate.

Description

technical field [0001] The invention belongs to the technical field of engineering vibration reduction and noise reduction, and specifically relates to a micro-perforated corrugated-honeycomb metamaterial plate structure that improves sound insulation and absorption performance. Background technique [0002] In the design of engineering structures, the performance of vibration and noise reduction is an important index to measure the practicality of structures. The siding structure of ships, aircraft and high-speed rail requires not only a certain bearing capacity, but also a certain sound insulation and sound absorption capacity. The mechanical and acoustic properties of the existing sandwich plate components are relatively limited. In engineering applications, the structure may be excited by various frequencies. When the excitation frequency is consistent with the natural frequency of the structure, the structure cannot resonate with the natural frequency, resulting in Its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/172G10K11/168B32B33/00B32B3/12B32B3/08
Inventor 王帅李凤明
Owner HARBIN ENG UNIV
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