Parallel anti-impact energy dissipation magnetorheological damper

Abstract

The invention discloses a parallel anti-impact energy dissipation magnetorheological damper, and relates to the technical field of civil engineering. The parallel anti-impact energy dissipation magnetorheological damper comprises an active adjustable energy dissipation part and a passive anti-impact energy dissipation part, wherein the active adjustable energy dissipation part consists of a main piston, a main piston rod, an excitation coil, a first gas compensation cavity and an MRG cavity; and the passive anti-impact energy dissipation part consists of a floating piston, an auxiliary piston,an auxiliary piston rod, a second gas compensation cavity and a shear thickening glue (STG) cavity. According to the parallel anti-impact energy dissipation magnetorheological damper, aiming at the problem that the instantaneous stiffness of the structure of a common magnetorheological damper is small under the impact generated by the high-speed load, the auxiliary piston extrudes STC to generatea shear thickening effect, so that the impact generated by the high-speed load is effectively resisted, and meanwhile, the continuous adjustment of the damping force is realized by electrifying the excitation coil on the main piston; and the double damping and energy dissipation can be realized, and the output force of the parallel anti-impact energy dissipation magnetorheological damper is larger than the output force of a common single-rod damper.

Description

technical field [0001] The invention mainly relates to the anti-seismic field of civil engineering, in particular to a parallel anti-impact energy-dissipating magnetorheological damper. Background technique [0002] With the development of the modern civil engineering industry, the double-rod damper has limitations in travel and installation space, but the single-rod damper can overcome this limitation. Ordinary single-rod magnetorheological dampers have the problem of low instantaneous structural stiffness under the impact of high-speed loads, and ordinary single-rod shear thickening dampers have the problem of being unable to cope with structural vibration control under load changes. Therefore, it is particularly important to invent a single-rod damper that combines the performance of these two dampers. [0003] Magnetorheological Ge1 (MRG for short) is a new generation of polymer magnetorheological materials. MRG is formed by dispersing micron-sized magnetic particles in...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention relates to a parallel anti-shock energy-dissipating magneto-rheological damper, which solves the problem that ordinary shear-thickening dampers cannot To deal with the problem of structural vibration control under fast and slow load changes; through the shear thickening effect generated by the relative motion of the auxiliary piston, the problem of small instantaneous structural stiffness of ordinary magnetorheological dampers under the impact of high-speed loads is solved

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