An ultra-low frequency shock-resistant metamaterial vibration isolation device

Abstract

The invention belongs to the technical field of vibration reduction and noise reduction, and in particular, relates to a metamaterial vibration isolating technology. A ultralow-frequency and shock-resistance metamaterial vibration isolating device comprises a metamaterial vibration isolating part (1), a lower positioning cover (2), an upper positioning cover (3), an inner limiting shell (4), an outer limiting shell (5), a lower bolt set (6) and an upper bolt set (7). The ultralow-frequency and shock-resistance metamaterial vibration isolating device theoretically can realize any low frequency range, so that the metamaterial vibration isolating device can bear higher static load on an online elastic deformation section, and can realize ultralow-frequency vibration isolating effect of a vibration isolating system on a ultralow-frequency vibration isolating section; and the metamaterial vibration isolating device is high in shock resistance, and can improve the safety of the vibration isolating system. The metamaterial vibration isolating part is not limited by a base material, so that the adaptability is wide.

Description

technical field [0001] The invention belongs to the technical field of vibration reduction and noise reduction, in particular to metamaterial vibration isolation technology. Background technique [0002] With the improvement of people's requirements for cabin comfort and the widespread use of precision instruments and equipment, more and more attention has been paid to the vibration and noise reduction of ship cabins. Especially in the precision instrument system, it is very important to improve the operating performance of the system to effectively isolate the micro-vibration of the system in the low frequency band or ultra-low frequency band. The metamaterial vibration isolator is a vibration isolator designed using metamaterial technology. Through the orderly structural design of the key physical dimensions of the material, it can obtain the extraordinary physical properties of ultra-low frequency shock resistance that traditional vibration isolators do not have. That is...

AI Technical Summary

Problems solved by technology

To reduce the natural frequency of the system, it is necessary to reduce the stiffness of the system or increase the mass of the system. However, in actual engineering design, considering the stability of the vibration isolation system, the minimum stiffness and maximum mass of the system are both limited value, so it is difficult for traditional linear vibration isolators to achieve ultra-low frequency vibration isolation

A spherical rubber vibration isolator for naval auxiliary equipment developed by the Netherlands Loggers Company for the Navy, which can only achieve low-frequency vibration isolation performance with a natural frequency of 5-9 Hz

In addition, the main core components of the rubber vibration isolators listed in the "Type Spectrum of Vibration Isolators for Ships" (First Edition) are all rubber, and the vibration isolation performance is completely determined by the rubber itself, so the design of this type The vibration isolation device usually involves the research and development of the rubber material itself, which increases the difficulty and cycle of the design of the vibration isolator

The airbag vibration isolator can achieve vibration isolation at a lower frequency in engineering, but its normal operation requires an additional set of auxiliary devices, and the lower natural frequency will make the volume and displacement of the airbag chamber too large, resulting in poor position control. Stable, so that the airbag cannot work normally, so it is difficult for the airbag vibration isolator to achieve the vibration isolation performance of ultra-low natural frequency

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