Nonlinear tunable mass and liquid damper

Abstract

The invention discloses a nonlinear tunable mass and liquid damper used by combining a tunable mass damper and a tunable liquid damper through nonlinear springs. The nonlinear tunable mass and liquid damper comprises a solid mass block, a cavity, internal viscous liquid, a plurality of universal wheels, a preserved hole and a nonlinear spring device. The solid mass block and a closed shell outside the solid mass block serve as a center structure. The viscous liquid with a certain volume is added in the cavity and can circulate in the reserved hole in the mass block. The center structure is connected with baffles or walls on the periphery through the four sets of nonlinear springs outside the cavity. Rotating shafts are arranged at the joints between the nonlinear springs and the baffles or walls so that the nonlinear springs can horizontally rotate. The universal wheels are arranged at the bottom of the center structure so that the damper can freely move in the horizontal plane. According to the working principle, energy input into a building through an earthquake or / and wind vibration is dissipated by means of the mass of the solid block, the non-linear springs and friction force provided when the viscous liquid flows through the small hole in the solid block. The nonlinear tunable mass and liquid damper integrates the advantages of the tunable mass damper and the tunable liquid damper, is installed on the top of a high-rise building, and is simple and reliable in structure, low in manufacturing cost and capable of achieving the good damping effect.

Description

technical field [0001] The invention relates to a nonlinear tunable mass-fluid damper, a TMD and TLD combined damper device combined with nonlinear spring tuning, which is composed of a water tank, a solid mass, and a nonlinear spring (NES system), and belongs to civil engineering vibration reduction control It can be used in high-rise buildings, high-rise structures and bridge structures, etc. Background technique [0002] With the rapid development of social economy and the continuous improvement of structural design theory, complex, rigid and flexible high-rise structures are constantly emerging, but there are also many disaster protection problems, most of which are dynamic problems, such as wind, earthquake, etc., due to their It has great randomness, which leads to extremely complex dynamic response of the structure, so it is of great research significance to correct the seismic performance of the structure. [0003] Structural vibration control in civil engineering r...

AI Technical Summary

Problems solved by technology

However, TMD has a disadvantage that cannot be ignored: the sensitivity to frequency tuning has errors

[0006] The applicable frequency band of the traditional linear vibration absorber is relatively narrow, but using the broadband vibration absorption characteristics of the nonlinear vibration absorber (NES) for dynamic tuning vibration reduction, only a limited vibration absorber can achieve a better vibration reduction effect, so it is more and more popular in the research community. more and more attention

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