Anti-impact 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 structural damage, overall structural strength failure, structural and material performance degradation, etc.

Active Publication Date: 2020-09-01
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
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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.

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  • Anti-impact planar quasi-zero stiffness elastic wave metamaterial device
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  • Anti-impact 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 anti-impact planar quasi-zero stiffness elastic wave metamaterial device. The device comprises mass blocks and a connecting rod, wherein the mass blocks are of cuboid structures, rectangular grooves of which the upper surfaces and the lower surfaces communicate with each other are formed in the middles of the four side faces of the mass blocks, connecting holes are formed in the upper end of the side wall of one side and the lower end of the side wall of the other side of each rectangular groove, and connecting shafts are mounted in the connecting holes; the mass blocks are hinged to each other through the connecting shafts and the connecting rods to form a planar periodic structure which is arranged in a square shape, each mass block is hinged to the adjacent mass block through a set of connecting rods, and therefore the quasi-zero stiffness characteristic is formed.

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 Applications(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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