Reset shape memory alloy-extrusion type lead composite energy consumption damper

Abstract

The invention relates to a reset shape memory alloy-extrusion type lead composite energy consumption damper and belongs to the field of civil engineering. The damper comprises a front cover plate, a rear cover plate, a left pull plate, a right pull plate, a fixing plate, a prestress adjusting plate, an inner barrel, an outer barrel, a push-pull rod, an SMA wire, an SMA spring and a lead block. The novel damper has the advantages of being high in reset capacity, high in energy consumption, adjustable in damping force, good in durability, corrosion resistance and anti-fatigue performance, sensitive in small deformation, large in working temperature range and the like, and has the good practical application value for energy consumption and vibration reduction. When in use, the damper is installed on the portion, capable of producing relative displacement, of a large device or a building, rods on the two sides of the damper produce relative displacement when the structure vibrates, some energy is consumed by the damper, damping energy consumption is achieved, the vibration reaction of the main body structure is reduced, and the damper is reset after vibration is stopped.

Description

technical field [0001] The invention relates to a self-resetting shape memory alloy-extruded lead composite energy dissipation damper, which is suitable for vibration reduction control of engineering structures and belongs to the field of civil engineering. Background technique [0002] The engineering structure system will respond when it is disturbed or stimulated by the outside world, because the excitation makes the system obtain energy input. At the same time, the system can convert the input energy into heat energy or other energy forms through a certain mechanism and consume it, so that the input energy and the consumed energy can maintain a balance. This ability of a system to dissipate energy is called damping. For huge civil engineering structures, it is not reliable to rely on their own damping and energy dissipation characteristics to resist external vibrations. With the continuous introduction of new damping energy dissipation technologies, the method of struc...

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Problems solved by technology

However, although this type of damper has a good energy dissipation effect, there will be residual deformation after vibration, which is not conducive to continued use

[0005] SMA is one of the most widely used smart materials. It is unloaded when it is higher than the austenite transformation temperature, and there is no residual strain. It is called superelasticity. Using this characteristic, SMA is widely used in the development of smart devices. The use form is SMA wire materials, SMA rods, SMA springs, etc. Compared with traditional devices, SMA devices have a series of advantages such as good durability and corrosion resistance, long service life, large allowable deformation and recoverable deformation, but the current SMA damper From the point of view, although it has a good self-resetting function, the energy consumption effect is not obvious, so its application is limited

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