Reset type SMA piezoelectricity-friction mixed damper

Abstract

The invention relates to a reset type SMA piezoelectricity-friction mixed damper, comprising a damper box, wherein a piezoelectric ceramic actuator box with a piezoelectric ceramic actuator is arranged in the damper box, a vertical left sliding plate is arranged on the left side of the piezoelectric ceramic actuator box, a vertical right sliding plate is arranged on the right side of the piezoelectric ceramic actuator box, the upper end and the lower end of the left sliding plate stretch out from a left chute in the damper box, the upper end and the lower end of the right sliding plate stretch out from a right chute in the damper box, and an SMA wire is connected between the left sliding plate and the right sliding plate outside the damper box; reset springs are arranged between the left side wall of the damper box and the left sliding plate and between the right sliding plate and a fixed baffle in the damper box; and an actuating rod sequentially passes through the left side wall of the damper, the left sliding plate, the piezoelectric ceramic box, the right sliding plate and the fixed baffle to be fixed with the left sliding plate and the right sliding plate by a left clamping ring and a right clamping ring on the actuating rod. The damper is simple in structure, convenient to process, strong in energy dissipating capability, and good in control effect, and can be effectively applied to the field of energy dissipation and seismic mitigation.

Description

technical field [0001] The invention belongs to the field of engineering structure vibration reduction control, in particular to a reset type SMA piezoelectric friction hybrid damper. Background technique [0002] The existing piezoelectric friction damper is a common energy consumption and vibration reduction device for structural control in civil engineering. According to the requirements of structural vibration reduction, the electric deformation of piezoelectric ceramics is used to change the fastening force between the friction plates to control the friction By adjusting the positive pressure between the plates, the friction force of the friction plates can be adjusted 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, they may fail because the friction surface is difficult to slide. In large earthquakes, they may not be able to effec...

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.

Images