Ultralow-frequency and shock-resistance metamaterial vibration isolating 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, and particularly relates to a metamaterial vibration isolation technology. Background technique [0002] With the improvement of people's requirements for cabin comfort and the wide use of precision instruments and equipment, the problem of vibration and noise reduction in ship cabins has been paid more and more attention. Especially in precision instrument systems, it is extremely important to improve the operating performance of the system whether it can effectively isolate the micro-amplitude vibration of the system at low frequency or ultra-low frequency. The metamaterial vibration isolation device is a vibration isolator designed by using metamaterial technology. Through orderly structural design of the key physical dimensions of the material, it can obtain the ultra-low frequency shock resistance that the traditional vibration isolator does not have extraordi...

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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