Shear thickening liquid vibration isolator

Abstract

The invention discloses a shear thickening liquid vibration isolator. The shear thickening liquid vibration isolator comprises a piston hydraulic cylinder and a shear thickening liquid; the shear thickening liquid is distributed in the piston hydraulic cylinder; the piston hydraulic cylinder comprises a piston, a cylinder body, a front cover and a rear cover; the piston is divided into a thick section and a thin section; the thin section of the piston is arranged in the cylinder body in a sleeving manner; and the front cover and the rear cover are arranged at two ends of the exterior of the thin section of the piston in the sleeving manner. The vibration isolator provided by the invention is simple in structure; optimized design of the performance of the vibration isolator is realized by adjusting structural parameters and material parameters; and the shear thickening liquid vibration isolator is applicable to vibration isolation of various engineering scenarios.

Description

technical field [0001] The invention belongs to the technical field of vibration control, in particular to a shear thickening liquid vibration isolator. Background technique [0002] Shear thickening fluid (Shear Thickening Fluid, STF) is a new type of functional material, which is formed by mixing the dispersed phase of nanoparticles (such as silica gel particles) and the dispersion medium (such as ethylene glycol, polyethylene glycol) It is very easy to deform at low shear rate and can flow slowly like a liquid; when subjected to high-speed shear, once the shear rate reaches the critical rate, its apparent viscosity increases greatly and becomes viscous , and even transform from liquid to solid. In recent years, with the increasing needs of safety protection, shear thickening liquid with excellent energy attenuation ability has attracted great attention as a convenient and practical protective material, and is gradually being used in the fields of human body protection, e...

AI Technical Summary

Problems solved by technology

Damping is one of the important characteristic parameters of the vibration isolator. When the excitation frequency is close to the natural frequency of the system, it will cause system resonance. For a linear vibration isolation system, the greater the damping of the vibration isolator, the better the suppression effect on the resonance peak amplification. However, when The excitation frequency is greater than When the natural frequency is doubled, the damping will have an adverse effect on the vibration isolation performance

Therefore, there is an inherent contradiction in the selection of the damping of the isolator in the linear vibration isolation system. The design of the damper generally compromises the resonance peak amplification and vibration isolation performance, and it is difficult to achieve the optimal vibration isolation effect.

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