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A Broadband Vibration and Noise Reduction Metamaterial Multi-span Beam Structure

A technology of vibration and noise reduction, metamaterials, applied in the direction of shock absorber, spring/shock absorber functional characteristics, shock absorber, etc. To achieve the effect of widening the frequency range of the wide band gap, simple structure, and improving the effect of vibration reduction and noise reduction

Active Publication Date: 2021-03-09
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 problem that the multi-span beam structure in the prior art cannot expand the bandgap frequency range, and the multi-span beam structure cannot attenuate the structural vibration amplitude in multiple frequency ranges, the present invention further provides a wide-band vibration and noise reduction Metamaterial multi-span beam structure

Method used

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  • A Broadband Vibration and Noise Reduction Metamaterial Multi-span Beam Structure
  • A Broadband Vibration and Noise Reduction Metamaterial Multi-span Beam Structure
  • A Broadband Vibration and Noise Reduction Metamaterial Multi-span Beam Structure

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specific Embodiment approach 1

[0027] Specific implementation mode one: combine figure 1 To illustrate this embodiment, the multi-span beam structure of a broadband vibration-reducing and noise-reducing metamaterial includes a base plate 1, a fixed support assembly, a long beam 7, M flexible support assemblies, and M+2 vibrators, where M is a positive integer; The base plate 1 is a cuboid, the fixed support assembly is arranged on one end of the upper surface of the base plate 1, M flexible support assemblies are equidistantly arranged on the upper surface of the base plate 1 along the length direction of the base plate 1, and the fixed support assembly and each flexible support The components are all fixedly connected to the bottom plate 1, M+2 vibrators are equidistantly arranged on the lower surface of the long beam 7 along the length direction of the long beam 7, and each vibrator is fixedly connected to the lower surface of the long beam 7, and the long beam 7 is set On the fixed support component and ...

specific Embodiment approach 2

[0029] Specific implementation mode two: combination figure 1 and figure 2 Describe this embodiment. This embodiment is to further limit the fixed support assembly in the specific embodiment. In this embodiment, the fixed support assembly includes a support cylinder A9, a smooth ring A10 and two circular hole support steel plates 2, Two circular hole supporting steel plates 2 are arranged oppositely, and the upper part of the side wall of each circular hole supporting steel plate 2 is provided with a through hole. Through hole interference fit, the smooth ring A10 is set in the middle of the outer surface of the support cylinder A9, and the smooth ring A10 is rotationally connected with the support cylinder A9, and the lower surface of the long beam 7 is bonded to the smooth ring A10. The bottom surface of a circular hole supporting steel plate 2 is affixed to the upper surface of the base plate 1, and the axis of the support column A9 is arranged in parallel with the broads...

specific Embodiment approach 3

[0031] Specific implementation mode three: combination figure 1 and figure 2 Describe this embodiment. This embodiment is to further limit the flexible support assembly described in the second specific embodiment. In this embodiment, the flexible support assembly includes a support cylinder B4, a smooth ring B8 and two long-hole support steel plates 3. Two long-hole supporting steel plates 3 are arranged opposite to each other. A horizontal strip-shaped hole is provided on the upper part of the side wall of each long-hole supporting steel plate 3. The two ends of the supporting cylinder B4 are respectively arranged in a horizontal strip-shaped hole, and the supporting cylinder Each end of B4 is slidingly connected with a horizontal strip hole, the smooth ring B8 is sleeved in the middle of the outer circular surface of the support cylinder B4, and the smooth ring B8 is rotationally connected with the support cylinder B4, and the lower surface of the long beam 7 is bonded to ...

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Abstract

The invention disclopses a wide-band vibration damping and noise reducing metamaterial multi-span beam structure, and belongs to the technical field of engineering vibration damping and noise reducing. The device mainly aims to solve the problems that in the prior art, the multi-span beam structure cannot widen the band gap frequency range and attenuate the structural vibration amplitude in a plurality of frequency ranges. The structure mainly comprises a bottom plate, a fixing supporting assembly, a long beam, M supporting assemblies and M +2 vibrators, wherein M is a positive integer, the fixing supporting assembly is arranged at one end of the upper surface of the bottom plate, the M supporting assemblies are arranged on the upper surface of the bottom plate in equal distance in the length direction of the bottom plate, the M +2 vibrators are arranged on the lower surface of the long beam in equal distance in the length direction of the long beam, each vibrator is fixedly connectedwith the lower surface of the long beam, the long beam is arranged on the fixing supporting assembly and the M supporting assemblies, the long beam is fixed with the fixing supporting assembly and each supporting assembly in a bonded mode, and each vibrator and one supporting assembly are arranged in a staggered mode. The structure is used for a bearing device of engineering construction.

Description

technical field [0001] The invention belongs to the technical field of engineering vibration reduction and noise reduction, and in particular relates to a multi-span beam structure of a broadband vibration reduction and noise reduction metamaterial. Background technique [0002] The vibration problem of the beam structure in engineering application cannot be ignored. It seriously affects the service life of the beam structure in engineering application. With the continuous development of science and technology, people are constantly overcoming the problem of vibration. , when the vibrator and the beam resonate, it can attenuate the propagation of elastic waves in the beam structure, so as to achieve the effect of vibration reduction. Due to the complex factors in modern engineering applications, the vibration frequency range is constantly expanding, which requires engineering applications. The middle beam structure can achieve the effect of vibration reduction in multiple fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F7/00
CPCF16F7/00F16F2228/04
Inventor 郝帅民李凤明吴志静
Owner HARBIN ENG UNIV
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