Low-frequency Intelligent nonlinear tuning mass damper (TMD) made of shape memory alloy (SMA) and making method thereof

Abstract

The invention discloses a low-frequency Intelligent nonlinear tuning mass damper (TMD) made of shape memory alloy (SMA) and a making method thereof. The damper includes a main structure, a shell, an SMA spring unit, a mass block, a preloaded spring unit, an annular sliding support, an annular limiting block, a permanent magnet and a copper plate, wherein the shell comprises a bottom plate, a stiffening side plate, a stiffening upper-cover plate, a vertical stiffening rib, a side plate circumferential-direction stiffening rib, an upper cover plate circumferential-direction stiffening rib and a longitudinal stiffening rib; the SMA spring unit includes a horizontal hinged joint, a horizontal guide rod, a SMA spring, a SMA core, a temperature control layer and a protective layer; a preloaded spring joint includes a universal hinged joint, a vertical guide rod and a preloaded spring. The invention aims to provide the low-frequency Intelligent nonlinear tuning mass damper (TMD) made of shape memory alloy (SMA). The SMA is used to provide the characteristics of hysteresis resilience and intelligent control, and a negative stiffness element is used to achieve the long period characteristic of the TMD; therefore the tuned mass damper has the advantages of a long period, controllable wide band control, intelligent adjustment, small occupancy space and the like.

Description

technical field [0001] The invention belongs to the technical field of vibration control devices for civil engineering structures, and in particular relates to a low-frequency shape memory alloy intelligent nonlinear tuning mass damper. Background technique [0002] Vibration control technology has been increasingly used in the dynamic catastrophe control of civil engineering structures, and the tuned mass damper (Tuned Mass Damper, TMD) is one of the most widely used dampers in practical engineering. Usually TMD contains solid mass, spring and fluid damper, with mass, stiffness and damping, the frequency of the substructure can be adjusted by changing the mass or stiffness to make it close to the fundamental frequency or excitation frequency of the main structure, absorbing vibration from the main structure The transmitted energy reduces the vibration response of the primary structure. [0003] The mainstream linear TMD is a narrow-band controller, that is, it can only abs...

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Problems solved by technology

The other type, TMD with hysteresis springs, although it has been proved theoretically that it also has a wide frequency band of vibration reduction, there are relatively few developments of corresponding practical devices.

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