A Novel Pendulum Type Eddy Current Damping Tuned Mass Absorber

Abstract

The invention discloses a novel pendulum-type eddy current damping tuned mass vibration absorber, comprising a frame connected with a structure to be damped, a rigid suspender having the upper end articulated to the top of the frame, and a permanent magnet arranged at the bottom of the rigid suspender, wherein a mass block is articulated to the body of the rigid suspender above the permanent magnet; a conductor plate for conducting electricity is arranged at the bottom of the frame; the upper surface of the conductor plate is an arc surface, and when the permanent magnet swings to any position, the clearance between the permanent magnet and the conductor plate is not changed. By changing the installation position of the permanent magnet and increasing the damping coefficient via the lever principle, the eddy current damping effect is strengthened. The clearance between the permanent magnet and the conductor plate is constant, so that the damping coefficient is not reduced and the damping effect is not influenced. The vibration absorber is simple in installation and maintenance.

Description

technical field [0001] The invention belongs to the fields of wind resistance and earthquake resistance of structures, and in particular relates to a novel pendulum type eddy current damping tuned mass shock absorber. Background technique [0002] At present, the mainstream technology for suppressing the vibration of large engineering structures is still the most reliable passive control, and the main forms include tuned mass dampers (Tuned Mass Damper, TMD for short) and various energy-dissipating dampers. Tuned mass dampers that suppress horizontal vibrations are generally divided into two types: rail spring type and pendulum type. Due to the static friction of the mass block supported by the guide rail, the large-scale tuned mass damper generally adopts the pendulum type (such as Taiwan 101 Building, whose mass block weighs 660 tons; Shanghai Tower, whose mass block weighs 1,000 tons). [0003] The damping element of the pendulum tuned mass damper used to be a viscous fl...

AI Technical Summary

Problems solved by technology

When the swing angle increases, the mass block 3 lifts up as a whole, and then drives the permanent magnet 7 to lift up, and the gap between the permanent magnet 7 and the conductor plate 8 increases, resulting in weakening of the eddy current effect, and a sharp decrease in the eddy current damping coefficient, which reduces the vibration reduction of the device performance

[0007] 2. Due to the small gap between the mass block 3 and the conductor plate 8, the installation process of the permanent magnet 7 is poor, and it is difficult for the staff to install the permanent magnet 7 in such a small gap

And the magnetism of permanent magnet 7 is big, has also increased installation difficulty

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