Adjustable sleeve type periodic vibration reduction structure and manufacturing method thereof

Abstract

The invention relates to an adjustable sleeve type periodic vibration reduction structure and a manufacturing method thereof. The sleeve type periodic vibration reduction structure comprises scatterers and a base body, wherein the scatterers are periodically distributed in the base body in an equally spaced and partially embedded mode. The scatterer comprises a sleeve, a screw rod, a top block and a regulation and control assembly. Threads are arranged in the sleeve, so that the height of the barrier is convenient to adjust; a vertical hole channel and a plurality of horizontal hole channels are formed in the top block, threads are arranged in the hole channels, the vertical hole channel is used for adjusting the position of the top block on the screw rod, and the horizontal hole channels are used for installing the regulation and control assembly; the lower portion of the screw is provided with threads corresponding to the sleeve, and the upper portion of the screw is provided with threads corresponding to the ejector block. When the main frequency range of environmental vibration is changed, the wave barrier does not need to be manufactured and installed again, and the adjusted barrier band gap can cover the changed main frequency range through quality adjustment, height adjustment and position adjustment, so that the propagation of vibration in the frequency band is effectively inhibited, and the vibration reduction requirement that the working frequency band is changed is met.

Description

technical field [0001] The invention relates to engineering vibration reduction and isolation, and relates to the fields of physics, mechanics, earthquake engineering and the like, in particular to an adjustable sleeve type periodic vibration reduction structure and a manufacturing method thereof. Background technique [0002] With the rapid development of rail transit technology, environmental vibration has become more and more disturbing to people's daily life and work. Setting up wave barriers on the propagation path of environmental vibration is an effective vibration isolation method. In recent years, the design of vibration-damping structures based on periodic structure theory has attracted more and more attention. A periodic structure is a structure in which some typical structural units are periodically and repeatedly arranged in space according to certain rules. The periodic structure has the characteristic of bandgap, that is, when the elastic wave propagates in ...

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Problems solved by technology

[0012] In view of the defects existing in the prior art, the purpose of the present invention is to solve the problem that the change of the main frequency of environmental vibration may lead to the failure of the periodic wave barrier, and overcome the difficulty of changing the working frequency band of the existing structure once the design is completed, and cannot meet the range of different frequency bands. Insufficient demand for vibration damping, providing an adjustable sleeve-type periodic vibration damping structure based on periodic structure theory and its manufacturing method

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