A granular planar elastic wave metamaterial device for vibration isolation and noise reduction
A granular, planar technology, applied in springs, springs/shock absorbers, non-rotational vibration suppression, etc., can solve problems affecting data acquisition quality and instrument life, and achieve easy adjustment of vibration and fluctuation band gap, yield Small, structurally stable effect
Active Publication Date: 2021-12-03
TIANJIN UNIV
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Problems solved by technology
[0004] High-frequency vibration can cause large disturbances to electronic high-precision instruments, etc., affecting data acquisition quality and instrument life
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[0023] Embodiments of the present invention are described in detail below, examples of which 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.
[0024] By changing the geometry and material parameters of the artificial periodic structure, the position and width of the elastic bandgap of the periodic structure can be artificially regulated. The embodiment of the present invention proposes a granular planar elastic wave metamaterial for vibration isolation and noise reduction. Since the nonlinear elastic wave metamaterial is an artificial periodic structure, this artificial periodic structure can effectively target At the joint, it solves the problem of suppressing vibration of certai...
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The invention discloses a granular planar elastic wave metamaterial device for vibration isolation and noise reduction, which includes a base, a positioning sliding support with locking teeth, a baffle with a sliding rod, a vibration transmission rod and a rigid spherical Particles; the upper surface of the base is provided with card slots arranged in a regular hexagon, and the positioning sliding support is fixedly connected with the base through the card teeth and the card slots; the two ends of the positioning sliding support are provided with through holes, through the through holes and The sliding rod on the baffle is flexibly connected; the positioning sliding support and the side opposite to the baffle are respectively provided with protrusions, and the first stainless steel pressure spring is installed between the protrusions; the upper surface of the baffle and the base is composed of The regular hexagonal space of the rigid spherical particles is filled with rigid spherical particles, and the rigid spherical particles are superimposed and arranged in the vertical direction to form more than two layers of rigid spherical particle layers, forming a two-dimensional periodic structure of rigid spherical particles; one end of the vibration transmission rod passes through the positioning in turn The sliding support and the baffle are in concentric and positive contact with the central particles in the outermost row of rigid spherical particles at the bottom layer.
Description
technical field [0001] The invention relates to the technical field of artificial elastic wave metamaterials, in particular to a granular planar elastic wave metamaterial device for vibration isolation and noise reduction with external load adjustment function. Background technique [0002] Since the 1990s, based on the need to control the behavior of elastic waves in structures / materials, research on the propagation characteristics of elastic waves and vibrations in periodic structures has attracted widespread attention. Elastic wave metamaterials have the properties of elastic waves and vibrations. Propagation of frequency band gaps is prohibited, so it can be used in vibration isolation and noise reduction fields such as mechanical engineering, civil engineering, and aerospace. [0003] The artificial periodic structural elastic wave metamaterial has a bandgap characteristic, and the elastic wave propagation in the bandgap frequency range is effectively suppressed. The b...
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IPC IPC(8): F16F15/02G10K11/162
CPCF16F15/02F16F2230/36G10K11/162
Inventor 王毅泽王苏宇汪越胜
Owner TIANJIN UNIV