SMA spring-STF viscous damper

Abstract

The invention provides an SMA spring-STF viscous damper which comprises a first connecting component, a piston rod, a left end cover, a first damping cavity, a damping cylinder, a piston, a second damping cavity, two SMA springs, a right end cover and a second connecting component, wherein the left end cover is arranged at one end of the damping cylinder; the right end cover is arranged at the other end of the damping cylinder; the interior of the damping cylinder is divided by the piston into the first damping cavity and the second damping cavity; the SMA springs which sleeve the piston rod are correspondingly arranged in the first damping cavity and the second damping cavity; the first damping cavity and the second damping cavity are filled with an STF shearing thickener; when the pistonmoves towards one side, the SMA spring on one side is compressed, and the SMA spring on the other side is restored towards the trend of the original length; and due to the different expansion and contraction degrees of the SMA springs on both sides, the resistance difference is produced, and the damping force is provided for the viscous damper. The SMA spring-STF viscous damper provided by the invention has the effects of improving the energy consumption under low-frequency loads and causing limiting resistance to the structural excessive displacement; furthermore, the self-resetting effect can be achieved after unloading; and the SMA spring-STF viscous damper has the advantages that the structure is simple and the space is saved.

Description

technical field [0001] The invention relates to the field of shock absorption and anti-vibration, in particular to a damper with self-resetting and position-limiting functions. Background technique [0002] Earthquake is a very destructive natural disaster, which causes immeasurable losses in a short period of time and poses a huge threat to human survival and development. Earthquake is a relatively common natural disaster in our country. Once it occurs, it will cause a large number of casualties and the collapse or damage of houses, infrastructure and other structures. Several earthquake disasters in my country in recent years have caused human beings to pay a heavy price, among which the damage of building structures under the action of earthquakes is the most direct cause of casualties and economic losses. Therefore, improving the earthquake resistance and disaster prevention capacity of building structures is the most fundamental measure to reduce earthquake disaster lo...

AI Technical Summary

Problems solved by technology

However, the traditional anti-seismic methods cannot achieve a good structural shock absorption effect, so it is particularly important to find new design concepts and methods in the field of anti-seismic

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