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A shock-resistant planar quasi-zero stiffness elastic wave metamaterial device

A quasi-zero stiffness, planar technology, applied in the field of artificial elastic wave metamaterials, can solve problems such as overall or internal damage of structures, failure of overall structural strength, and degradation of structural and material properties.

Active Publication Date: 2022-03-29
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] As we all know, when dynamic loads such as transient impacts occur in engineering structures, it will lead to overall or internal damage to the structure, including the decline of structural and material properties, and may even cause catastrophic strength failure of the overall structure.

Method used

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  • A shock-resistant planar quasi-zero stiffness elastic wave metamaterial device
  • A shock-resistant planar quasi-zero stiffness elastic wave metamaterial device
  • A shock-resistant planar quasi-zero stiffness elastic wave metamaterial device

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Embodiment Construction

[0026] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0027] Due to the periodic structural properties of elastic wave metamaterials, it can produce strong attenuation effects on the responses under shock waves and simple harmonic vibrations. Embodiments of the present invention propose a shock-resistant planar quasi-zero-stiffness elastic wave metamaterial device. Due to the quasi-zero-stiffness characteristic, the response attenuation in a wide low frequency range can be realized, thereby realizing shock waves and shock waves in the low frequency range. Simple harmonic vibratio...

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Abstract

The invention discloses an impact-resistant plane type quasi-zero stiffness elastic wave metamaterial device, comprising a mass block and a connecting rod, the mass block is a cuboid structure, and the middle parts of the four side surfaces of the mass block are provided with an upper surface and a lower surface Rectangular grooves that penetrate each other, the upper end of the side wall on one side of each rectangular groove and the lower end of the side wall on the other side are provided with connecting holes, and the connecting holes are installed with connecting shafts; the mass blocks are connected through the connecting holes. The shaft and the connecting rod are hinged to each other to form a planar periodic structure arranged in a square, and each mass block and each adjacent mass block are hingedly connected by a set of connecting rods, thereby forming a quasi-zero stiffness characteristic.

Description

technical field [0001] The invention relates to the technical field of artificial elastic wave metamaterials, in particular to an impact-resistant planar quasi-zero-stiffness elastic wave metamaterial device. Background technique [0002] In recent years, elastic wave metamaterials have become increasingly popular new artificial materials, and one type of composite periodic materials is called phononic crystals. The special properties of this metamaterial significantly strengthen the structure's ability to control the propagation of elastic waves. When elastic waves propagate in phononic crystals, dispersion behavior occurs to form forbidden band (band gap) characteristics. In the frequency range of the band gap, elastic waves cannot propagate from the phononic crystal. This kind of vibration and noise reduction characteristics has become a hot topic in many professional fields such as mechanics, physics, mechanical engineering, and medicine. It has attracted the attention...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F7/10
CPCF16F7/1028F16F2222/08F16F2228/06
Inventor 王毅泽郑若仪汪越胜
Owner TIANJIN UNIV
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