Band gap adjustable type phononic crystal vibration isolator based on shape memory alloy

Abstract

The invention discloses a band gap adjustable type phononic crystal vibration isolator based on shape memory alloy and relates to a vibration isolator. The band gap adjustable type phononic crystal vibration isolator based on shape memory alloy aims to solve the problems of existing one-dimensional phononic crystal vibration isolators that the periodicity of period materials is low, vibration isolating effect is poor, working space is limited, the band gap can not be adjusted, and the vibration isolation frequency range is narrow. The band gap adjustable type phononic crystal vibration isolator comprises a vibration input support, lateral skin, upper skin, lower skin, a secondary vibration isolation upper support, a vibration output support, a primary vibration isolation lower support, three primary vibration isolation phononic crystal support pillars, three secondary vibration isolation phononic crystal support pillars, three trinary vibration isolation phononic crystal support pillars, three sets of primary vibration isolation shape memory alloy compression driving components, three sets of secondary vibration isolation shape memory alloy compression driving components, three sets of trinary vibration isolation shape memory alloy compression driving components, three sets of primary vibration isolation phononic crystal components, three sets of seconday vibration isolation phononic crystal components and three sets of trinary vibration isolation phononic crystal components. The band gap adjustable type phononic crystal vibration isolator is used for vibration isolation and noise reduction.

Description

technical field [0001] The invention relates to a vibration isolator in the field of vibration isolation and noise reduction. Background technique [0002] There are various vibration problems in the machinery industry and other industrial sectors, many of which are harmful vibrations. Excessive vibration and noise caused by vibration will pollute the environment and damage people's health. [0003] People have made great progress in the study of photonic crystals. In view of the analogy between phononic crystals and photonic crystals, phononic crystals have gradually become a new research hotspot in the past ten years. An important feature of phononic crystals is their acoustic bandgap, that is, phononic crystals are functional materials or structures composed of two or more elastic media with periodic structure and elastic wave bandgap characteristics. When the elastic wave propagates in the phononic crystal, affected by its internal periodic structure, a special dispersi...

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Problems solved by technology

[0007] The present invention is to solve the problem that the period number of the periodic material of the current one-dimensional phononic crystal vibration isolator is small, the vibration isolation effect is poor, the working space is limited and the band gap of the one-dimensional phononic crystal vibration isolator cannot be adjusted, and the vibration isolation The problem of narrow frequency range, and then provide a phononic crystal vibration isolator based on shape memory alloy with adjustable bandgap

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