Design method of quasi-zero stiffness vibration isolator

Abstract

The invention discloses a design method of a quasi-zero-stiffness vibration isolator, and belongs to the field of vibration isolators, the design method of the quasi-zero-stiffness vibration isolator comprises the following steps: S1, determining the bearing capacity requirement of the quasi-zero-stiffness vibration isolator, calculating the static load stiffness of the quasi-zero-stiffness vibration isolator through the bearing capacity and the pre-compression amount of the quasi-zero-stiffness vibration isolator, and calculating the static load stiffness of the quasi-zero-stiffness vibration isolator according to the static load stiffness of the quasi-zero-stiffness vibration isolator; s2, designing a positive stiffness formula of the quasi-zero stiffness vibration isolator, and designing, calculating and matching a positive stiffness device; S3, calculating and obtaining a negative stiffness formula of the quasi-zero stiffness vibration isolator according to the positive stiffness formula of the quasi-zero stiffness vibration isolator; S4, designing, calculating and matching a negative stiffness device; and S5, arranging a limiting device, and obtaining the quasi-zero stiffness vibration isolator. According to the design method of the quasi-zero stiffness vibration isolator, the designed vibration isolator can have quasi-zero stiffness.

Description

technical field [0001] The invention belongs to the field of vibration isolators, and in particular relates to a design method of a quasi-zero stiffness vibration isolator. Background technique [0002] The application of vibration isolators in the field of vibration reduction is quite mature. The basic principle is to form a mass-spring system through the upper weight and elastic elements. The natural frequency of the system is where K and M are the stiffness and mass in the mass-spring system simplified to a single degree of freedom, when the forced vibration frequency is greater than When multiplying the fixed frequency of the system, the vibration reduction effect is obvious. It can be seen that in order to achieve a better vibration reduction effect, it is necessary to reduce the natural frequency of the system as much as possible to isolate the vibration in most frequency ranges. According to the calculation formula of natural frequency, the method to reduce the na...

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Problems solved by technology

Quasi-zero-stiffness vibration isolators have been maturely applied in the fields of precision instruments, car seats and bogies, etc. Quasi-zero-stiffness vibration isolators are also being studied in recent years in the fields of construction, equipment, track and other engineering vibration reduction, but there is a lack of A product design method

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