A three-dimensional vibration isolation device

Abstract

The invention is a three-dimensional vibration isolation device, which mainly includes a horizontal vibration isolation device, including guide rails, rubber bearings and Euler beams; a vertical vibration isolation device, including a disc spring, a loading ring, and a coil spring; a connecting and limiting device Wait. The invention utilizes the negative stiffness characteristics of Euler beams, combines rubber bearings and guide rails to obtain lower horizontal stiffness, and has a good horizontal shock isolation (vibration) effect; utilizes the negative stiffness characteristics of disc springs, and combines spiral springs to form Vertical vibration isolation (vibration) device with quasi-zero stiffness characteristics; the motion of the two is decoupled to achieve the effect of three-dimensional isolation (vibration). The invention is suitable for buildings, instruments and equipment sensitive to environmental vibration, has excellent shock isolation (vibration) effect, and has certain tensile capacity.

Description

technical field [0001] The invention relates to a three-dimensional vibration isolation device, which belongs to the field of structural vibration isolation and vibration control. Background technique [0002] Vibration isolation technology has been widely researched and applied in the field of building structure isolation and vibration control of instruments and equipment. The basic principle of vibration isolation is to set a vibration isolation layer with less rigidity through a support or a special structure between the vibration-isolated body and its underlying foundation, and concentrate the deformation on the vibration-isolation layer, thereby reducing external environmental vibration or earthquake action. Below, the dynamic response of the upper isolator. [0003] However, the existing vibration isolation devices have the following deficiencies: first, when the existing rubber bearings ensure the vertical bearing capacity, it is difficult to achieve a sufficiently s...

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Problems solved by technology

[0003] However, the existing vibration isolation devices have the following deficiencies: first, it is difficult for the existing rubber bearings to achieve a sufficiently small horizontal stiffness when ensuring the vertical bearing capacity, which limits the ability of horizontal vibration isolation; The seismic isolation of buildings mainly stays at the stage of only isolating horizontal earthquakes, not vertical earthquakes

However, the ground motion data of earthquakes at home and abroad in recent years show that in the near-fault earthquake area, the vertical component of ground motion is very strong, and the peak acceleration even exceeds the horizontal component, so it is necessary to solve the problem of vertical isolation of buildings The third is that during an earthquake, a seismically isolated building with a large height-to-width ratio will sway and torsion, causing the support to be pulled, or even yield and fail.

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