Variable damping viscoelastic plate type damper

Abstract

The invention discloses a variable damping viscoelastic plate type damper, which includes outer side steel plates arranged oppositely up and down and a middle steel plate located between the two outerside steel plates. The outer side steel plates are provided with a plurality of square hole structures in the horizontal direction, the variable damping viscoelastic plate type damper further includes a plurality of groups of damping units arranged in parallel, and the groups of damping units are symmetrically distributed on the upper and lower sides of the middle steel plate with the middle steel plate as a symmetry axis correspondingly; the groups of damping units are connected with the middle steel plate by gluing, wherein the first group of damping units is in glue joint with a connectingplate, and the connecting plate is fixedly connected with the outer side steel plates; and the rest groups of damping units are in glue joint with T-shaped baffles correspondingly, the T-shaped baffles include horizontal parts and vertical parts, and the vertical parts of the T-shaped baffles pass through the centers of the square hole structures of the outer steel plates. The damper includes thedamping units which are not required to work for every vibration, the damper can determine the number of damping units participated in the work according to the vibration amplitude, so that the magnitude of damping force of the damper is adjusted.

Description

technical field [0001] The invention relates to a variable damping viscoelastic plate damper, which belongs to the technical field of shock absorbing and isolating devices. Background technique [0002] Viscoelastic materials belong to high molecular polymers and are energy-dissipating materials with excellent performance. This material has both viscosity and elasticity. When deformed under the action of alternating stress, the interior of the viscoelastic material will undergo movement such as breaking and reorganization of the molecular chain of the matrix, friction between fillers or between fillers and the matrix, and these physical movement processes will store part of the energy in the form of potential energy. Get up and convert another part of the energy into heat and dissipate it. The viscoelastic damper based on viscoelastic material is a new type of energy dissipation shock absorber used in structural wind and vibration (seismic) engineering. This type of damper ...

AI Technical Summary

Problems solved by technology

However, the viscoelastic material is a kind of damping material whose performance is greatly affected by the ambient temperature. The increase in temperature will reduce the damping ratio of the viscoelastic material, thereby weakening the working performance of the damper and accelerating the aging of the material.

When the current viscoelastic damper is deformed due to external vibration, all the viscoelastic materials inside will be deformed and the temperature will rise, and this temperature rise effect will have a negative impact on the performance and durability of the viscoelastic damper.

In addition, under normal circumstances, the main structure can withstand slight vibration. Generally, there is a clear anti-vibration index for environmental vibration. The main structure can be used normally if the vibration is lower than this index. Excessive suppression of vibration is uneconomical and will force vibration reduction. The material is overworked, increasing the loss of the material

Finally, viscoelastic materials are prone to aging during service, and the viscoelastic damping unit often needs to be replaced or repaired. Vulcanization will take more time cost and economic cost

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