A two-degree-of-freedom quasi-zero stiffness low-frequency vibration isolation device

Abstract

The invention relates to the technical field of low-frequency vibration isolation, in particular to a two-degree-of-freedom quasi-zero-stiffness low-frequency vibration isolation device, wherein a support plate is used to place a body to be isolated, and the upper and lower vertical plane springs of the upper-layer quasi-zero-stiffness vibration isolator are up and down. Both ends are vertically fixed on the support plate and the middle mass block respectively, one end of the upper nonlinear spring is connected with the side of the support plate, and the other end of the upper nonlinear spring is connected with the upper horizontal moving mechanism to realize horizontal movable adjustment and vertical moving mechanism. The upper and lower ends of the vertical plane spring in the lower layer of the quasi-zero stiffness vibration isolator are vertically fixed on the middle mass block and the base respectively, and one end of the lower layer nonlinear spring is connected with the middle mass block. The other end of the nonlinear spring is connected to the lower horizontal moving mechanism to realize horizontal adjustment. The present application can reduce the initial vibration isolation frequency of the system. In a specific frequency region, the vibration isolation performance is better than that of a single degree of freedom quasi-zero stiffness vibration isolation system .

Description

technical field [0001] The invention relates to the technical field of low frequency vibration isolation, in particular to a low frequency vibration isolation device with two degrees of freedom quasi-zero stiffness. Background technique [0002] Vibration is a ubiquitous physical phenomenon in nature, especially in daily life and industrial production. In some cases, vibration will bring certain harm to our scientific research and production activities. The traditional linear vibration isolator is faced with the contradiction between the bearing capacity and the vibration isolation effect, while the quasi-zero stiffness vibration isolation system, as an emerging nonlinear low-frequency vibration isolation technology, has changed the traditional concept of vibration isolation of the linear system. The quasi-zero stiffness vibration isolation system is composed of positive and negative stiffness structures in parallel. It not only has sufficient static stiffness to support th...

AI Technical Summary

Problems solved by technology

With the rapid development of science and technology, precision machinery, shipboard equipment, and high-speed vehicles have higher and higher performance requirements for vibration isolation systems. Traditional linear vibration isolation systems and single-degree-of-freedom quasi-zero stiffness vibration isolation systems have been difficult to meet the requirements of various industries. growing demand

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