A universal semi-active magneto-rheological vibration damping device

Abstract

The invention discloses a universal semi-active magnetorheological damping device. The universal semi-active magnetorheological damping device comprises an inner cylinder, an outer cylinder and a rotary disc and is characterized in that the inner cylinder is fixed onto the rotary disc, and the inner cylinder can rotate in optional directions under the effect of the rotary disc; the rotary disc isconnected with an induction control device; a connecting block is arranged inside an inner cylinder bottom plate, and a working cylinder is fixed on the connecting block; partitions are arranged inside the working cylinder to separate the interior of the working cylinder into a central cavity and damping cavities; a mass block which can horizontally move along the axis direction of the working cylinder is arranged in the central cavity; the mass block is fixedly connected with a piston rod which can axially move along the working cavity; a piston is arranged inside each damping cavity, and thepiston rod penetrates through holes reserved in the partitions and extends into the damping cavities to be fixedly connected with the pistons; shape memory alloy springs sleeve the piston rod locatedin the working cavity, one end of each spring is fixedly connected to the mass block, and the other end of each spring is fixed to the corresponding partition; each damping cavity is filled with magnetorheological fluid, an energizing coil wind the outside of each damping cavity, and the energizing coils are connected with the induction control device.

Description

technical field [0001] The invention relates to the field of building structures, in particular to a universal semi-active magneto-rheological vibration damping device, which is mainly used for vibration damping control of towering and other related structures. Background technique [0002] With the development of society and economy, the form of architectural structure tends to be diversified and complicated, and the sensitivity to wind, rain or earthquake disasters is also becoming more and more significant. Under the action of wind load or earthquake, the building structure produces a strong vibration response, and the structural components are fatigued and damaged to varying degrees. Once they fail, continuous damage will occur, resulting in serious partial or overall collapse of the building structure. At present, structural vibration control technology is an effective method to reduce the vibration response of the main structure. [0003] Structural vibration control ...

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Problems solved by technology

[0004] At present, there are three main situations for structural vibration control direction and device layout strategy: (1) structural one-way vibration control, installing a one-way control damper whose vibration direction is consistent with the structural vibration direction; (2) structural orthogonal two-way For vibration control, it is generally necessary to install one-way vibration dampers to control structural vibration in two directions or slide rail dampers capable of bidirectional movement; (3) vibration control in any direction of the structure generally uses pendulum-type tuned mass damping, However, its pendulum length and mass are relatively fixed, and the frequency of a simple pendulum is controlled by the pendulum length and mass. The vibration frequencies of complex structures in all directions are often inconsistent, so there are certain defects.

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