Quasi-zero stiffness positive stiffness adjusting method, quasi-zero stiffness adjusting method and vibration isolator

Abstract

The invention discloses a quasi-zero stiffness positive stiffness adjusting method, a quasi-zero stiffness adjusting method and a vibration isolator, wherein the positive stiffness adjusting method includes the following steps: arranging a movable supporting column in the quasi-zero vibration isolator; connecting a body by vibration isolation to the top of the supporting column; sequentially arranging a magnet I and a magnet II along the axial direction of the supporting column; arranging the magnet I at the bottom of the supporting column; arranging the magnet II on the quasi-zero vibration isolator, wherein the magnet I and the magnet II are arranged in opposite magnetic poles; arranging a plurality of magnets III on the quasi-zero vibration isolator positioned between the magnet I and the magnet II along the circumferential direction of the supporting column, wherein the magnets III are arranged in opposite magnetic poles, and the same-sex magnetic poles arranged among the magnets III and the same-sex magnetic poles arranged between the magnet I and the magnet II belong to the same polarity. When the quasi-zero stiffness and positive stiffness is adjusted, the magnetic line density between the magnet I and the magnet II is adjusted by changing the magnetic line state among the magnets III, so that the adjustment of the quasi-zero stiffness and positive stiffness can be realized.

Description

technical field [0001] The invention relates to a stiffness adjustment method of a quasi-zero stiffness vibration isolator and a vibration isolator, in particular to a quasi-zero stiffness positive stiffness adjustment method, a quasi-zero stiffness adjustment method and a vibration isolator. Background technique [0002] In the field of engineering vibration control, vibration isolation is one of the most commonly used methods. Vibration isolation is to add appropriate elastic elements and damping elements in the vibration transmission path, so that within a certain frequency range, the vibration transmitted to the protected body is as small as possible. Usually, the vibration isolation system has its own natural frequency, and the frequency range that can play the role of vibration isolation is theoretically greater than the natural frequency of the vibration isolation system. times, the higher the natural frequency of the vibration isolation system, the higher the initi...

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Problems solved by technology

[0004] Although the quasi-zero stiffness vibration isolator has excellent low-frequency vibration isolation effect, its performance is very sensitive to the load-bearing mass. When the load-bearing mass is different, the support balance position will change, and at the new balance position, the vibration isolator stiffness It is not a quasi-zero state, and the effect of the vibration isolation system will be greatly reduced

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