A modular quasi-zero stiffness vibration isolation structure

Abstract

The invention discloses a modular quasi-zero stiffness vibration isolation structure, which comprises several vibration isolation modules arranged side by side, and each vibration isolation module includes a positive stiffness unit and a plurality of negative stiffness units; several negative stiffness units are from top to The lower ones are connected in turn, the negative stiffness unit includes the upper shell, the motion axis and two hyperbolic beams, the hyperbolic beams include two cosine-shaped buckling beams arranged in parallel and spaced up and down, and the two cosine-shaped buckling beams in the same hyperbolic beam The middle part and both ends of the beam are fixed respectively, and the two ends of the hyperbolic beam are fixedly connected with the inner wall of the upper shell respectively. Vertical, the two ends of the hyperbolic beam are located on the same horizontal plane; the positive stiffness unit includes the lower shell, the elastic body bracket and the electrorheological elastomer; the upper shell and the lower shell are both cylindrical, and the upper shell and the adjacent The upper shell is fixed. The vibration isolation effect of the modular quasi-zero stiffness vibration isolation structure of the invention is good.

Description

Technical field [0001] The present invention relates to the field of vibration control technology, in particular to a modular quasi-zero stiffness vibration isolation structure. Background [0002] Mechanical vibration is one of the most common phenomena in nature and is widely present in daily life and production practice. In most cases, mechanical vibration is harmful vibration, such as precision processing platforms, optical platforms, measuring instruments, etc. are disturbed by vibration, which will affect their working performance; such as the vibration generated by mechanical equipment such as marine platforms, ship equipment, locomotives, etc., will not only affect the normal operation of the equipment, but also cause fatigue damage to the structure and endanger the health of the staff. Therefore, it is of great significance to take effective measures to reduce harmful vibrations. As an elastic element between the connection carrier and the device, the vibration isolator...

AI Technical Summary

Problems solved by technology

However, the quasi-zero-stiffness vibration isolation devices based on mechanical springs and electromagnetic negative stiffness have the disadvantages of large volume, complex assembly, difficult adjustment, and low environmental adaptability, and the ideal vibration isolation effect cannot be achieved when the vibration amplitude is small.

Images