A reset type sma piezoelectric friction hybrid damper

Abstract

A reset-type SMA piezoelectric friction hybrid damper, including a damper box, a piezoelectric ceramic driver box with a piezoelectric ceramic driver is arranged in the damper box, and a vertical The left slide plate is set up vertically on the right side. The upper and lower ends of the left slide plate protrude from the left chute on the damper box, and the upper and lower ends of the right slide protrude from the right chute on the damper box. SMA wires are connected between the left slide plate and the right slide plate outside the damper box, and return springs are arranged between the left side wall and the left slide plate, and between the right slide plate and the fixed baffle in the damper box, and the actuating rods are in turn Pass through the left side wall of the damper, the left slide plate, the piezoelectric ceramic box, the right slide plate and the fixed baffle plate, and fix the left slide plate and the right slide plate through the left snap ring and the right snap ring on the actuating rod. The structure of the present invention is simple, The utility model has the advantages of convenient processing, strong energy dissipation capacity and good control effect, and can be effectively applied in the field of energy dissipation and shock absorption.

Description

technical field [0001] The invention belongs to the field of engineering structure vibration damping control, in particular to a reset type SMA piezoelectric friction hybrid damper. Background technique [0002] The existing piezoelectric friction damper is a common energy-consuming vibration damping device in civil engineering structure control. According to the requirements of structural vibration reduction, the electric deformation of piezoelectric ceramics is used to change the tightening force between the friction plates and control the friction. The positive pressure between the plates can adjust the friction force of the friction plates in real time, so that the friction damper has intelligent characteristics. However, piezoelectric friction dampers generally need to apply a certain initial pressure. In small earthquakes, it may fail because the friction surface is difficult to slide. In large earthquakes, it may not be able to effectively dampen due to insufficient e...

AI Technical Summary

Problems solved by technology

However, piezoelectric friction dampers generally need to apply a certain initial pressure. In small earthquakes, they may fail because the friction surface is difficult to slide. In large earthquakes, they may not be able to effectively absorb shocks due to insufficient energy consumption. Therefore, in engineering applications There are certain restrictions in

SMA wire has good durability, corrosion resistance, and superelasticity, but the damper made of it often cannot adjust the control force in real time, which also limits its application in structural vibration control.

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