Tuned electromagnetic inertial mass damper

Abstract

The invention discloses a tuned electromagnetic inertial mass damper, which mainly comprises a ball screw mechanism arranged in an outer barrel. The upper end of the ball screw mechanism is connectedwith a gearbox and a rotary flywheel, and the gearbox is fixed by an upper limit device; the tuned electromagnetic inertial mass damper further comprises an inner barrel arranged at the lower end of the interior of the outer barrel, a lower limit device is arranged on the outer part of the inner barrel, and the inner tube can linearly move up and down in the lower limit device; the upper end of the inner barrel is fixedly connected with the ball screw mechanism to drive the ball screw mechanism to linearly move up and down; and a coil and a permanent magnet are arranged in sequence from the outer side to the inner side of the lower part inside the inner barrel, the permanent magnet is internally and fixedly connected with a magnetic conductor capable of linearly moving up and down, the magnetic conductor extends to the outer sides of the lower ends of the inner barrel and the outer barrel, the lower end of the magnetic conductor body is fixedly connected with the lower part connectionpart and a connection plate of the lower part connection part, and a spring and the connecting plate are fixedly connected with the lower end partof the inner barrel and are mounted outside the magnetic conductor in a sleeving mode. The tuned electromagnetic inertial mass damper is suitable for civil engineering structures with relative displacement, such as stay cable, long span bridge beam and tower beam connection positions, and displacement positions among high-rise buildings.

Description

technical field [0001] The invention belongs to the technical field of structural vibration control, and in particular relates to a tuned electromagnetic inertial damper suitable for structural vibration control in civil engineering. Background technique [0002] Under external effects such as strong winds, heavy rains, and earthquakes in the natural environment, civil engineering structures are prone to large vibrations and structural damage, which affects the safety and comfort of the structure, and may reduce the service life of the structure. How to alleviate the structural vibration caused by external effects has become a hot topic of research by scholars at home and abroad. So far, domestic and foreign scholars have researched and developed many structural control technologies, which can be divided into passive control, active control, semi-active control and hybrid control according to whether the control measures adopted require external energy. Structural passive c...

AI Technical Summary

Problems solved by technology

When the volume of the structure is large, the mass of the tuned mass damper required is also very large; however, it is difficult to use a large mass mass in practical engineering

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