Quasi-zero stiffness vibration isolation system with bending moment resistance effect

Abstract

The invention relates to a quasi-zero stiffness vibration isolation system with a bending moment resistance effect. The quasi-zero stiffness vibration isolation system comprises a base, a support cylinder, a vertical elastic element, a vertical damper and at least four groups of lateral support assemblies, and the vertical elastic element, the vertical damper and the lateral support assemblies arevertically arranged; each group of lateral support assembly comprises at least one horizontal damping device; each horizontal damping device comprises a horizontal damper and a lateral elastic element; each horizontal damper is arranged in the horizontal direct; one end of each lateral elastic element is connected with a cylinder body of the horizontal damper, and the other end of each lateral elastic element is connected with the output end of the horizontal damper; and one end of each horizontal damper is hinged with the base, and the other end of each horizontal damper is hinged with the support cylinder. According to the quasi-zero stiffness vibration isolation system with the bending moment resistance function, a multilayer layout mode with lateral support is adopted and the verticaldamper and the horizontal dampers with variable damping are arranged, so that the quasi-zero stiffness vibration isolation system with the bending moment resistance function, which is close to the vibration isolation in the full frequency band range and has the bending moment resistance and lateral impact load functions is realized, the load is large, and the low-frequency vibration isolation effect is good.

Description

technical field [0001] The invention relates to a vibration isolation device, in particular to a quasi-zero stiffness vibration isolation system with anti-bending moment effect. Background technique [0002] According to the vibration theory, for a single-degree-of-freedom linear vibration isolation system, only when the external excitation frequency is greater than the natural frequency of the system Therefore, the vibration isolator needs to be designed according to the lower limit frequency of the isolated system, so that the natural frequency of the vibration isolation system is lower than the lower limit frequency. When the load of the vibration isolator is fixed, the lower the lower limit frequency is, the weaker the stiffness of the designed vibration isolator is, and the greater the flexibility it exhibits. The use of too small stiffness of the elastic device in the design of the vibration isolator will affect the bearing capacity of the system, so a balance needs...

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Problems solved by technology

[0005] However, the existing quasi-zero stiffness vibration isolators are mainly aimed at the vibration isolation requirements in a single direction, and it is difficult to achieve the vibration isolation requirements under the joint action of vertical load, lateral impact and bending moment load.

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