A magnetic screw type eddy current damper with negative stiffness nonlinear energy well

A nonlinear energy trap, magnetic screw technology, applied in the direction of protective buildings/shelters, building types, buildings, etc., can solve the friction of ball screw type inertial container, large physical mass of TMD, static elongation of spring Large and other problems, to achieve the effect of eliminating friction, facilitating modular assembly, and reducing physical counterweight

Active Publication Date: 2022-02-08
湖南省潇振工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention aims to improve the light weight and durability level of traditional TMD, improve the robustness of the system, and solve the problem of excessive physical mass of traditional TMD, excessive static elongation of spring, narrow vibration reduction frequency band and ball screw type inerter There are problems such as friction, and a vertically tuned mass magnetic screw type inertial electric eddy current damper with negative stiffness nonlinear energy well is proposed

Method used

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  • A magnetic screw type eddy current damper with negative stiffness nonlinear energy well
  • A magnetic screw type eddy current damper with negative stiffness nonlinear energy well
  • A magnetic screw type eddy current damper with negative stiffness nonlinear energy well

Examples

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Effect test

Embodiment 1

[0062] like figure 2 , 4 , 6 and 8 show a vertically tuned mass magnetic screw type inertial eddy current damper with negative stiffness nonlinear energy well, including spring mass system, inertial mass system, eddy current damping system, negative stiffness system and support system.

[0063] The spring mass system includes a spring (3) and a counterweight (5), the counterweight (5) is in the shape of a cuboid, and a hole larger than the diameter of the guide rod (2) is left on it, so that the counterweight (5) ) is sleeved on the guide rod (2) and can move linearly along it; the spring (3) is sleeved on the guide rod (2), one end is fixed with the counterweight (5), and the other end is connected with the outer frame (1) or the support The bracket (4) is consolidated.

[0064] The inertial mass system includes a flywheel (6), a magnetic screw nut pair (7) and a magnetic suspension thrust bearing (8). The flywheel (6) is sleeved on the magnetic lead screw (72) and the m...

Embodiment 2

[0069] like figure 1 , 3 , 5 and 7 show a vertically tuned mass magnetic field modulation type magnetic screw type inertial eddy current damper with negative stiffness nonlinear energy well, including spring mass system, inertial mass system, eddy current damping system, negative Stiffness system and support system.

[0070] The spring mass system includes a spring (3) and a counterweight (5), the counterweight (5) is in the shape of a cuboid, and a hole larger than the diameter of the guide rod (2) is left on it, so that the counterweight (5) ) is sleeved on the guide rod (2) and can move linearly along it; the spring (3) is sleeved on the guide rod (2), one end is fixed with the counterweight (5), and the other end is connected with the outer frame (1) or the support The bracket (4) is consolidated.

[0071] The inertial mass system includes a flywheel (6), a magnetic screw nut pair (7), a modulation ring (12) and a magnetic suspension thrust bearing (8). The flywheel (6...

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Abstract

The invention relates to a magnetic lead screw type eddy current damper with a negative stiffness nonlinear energy well, comprising a spring mass system, an inertial mass system, an eddy current damping system, a negative stiffness system and a support system. The spring mass system includes springs and counterweights, the inertial mass system includes flywheels, magnetic screw nut pairs, and magnetic suspension thrust bearings, the eddy current damping system includes straight permanent magnets, conductor plates, and back irons, and the support system includes guide rods and support brackets. frame and outer frame, the negative stiffness system includes sets of permanent magnets of different names and / or sets of permanent magnets of the same name. The damper of the invention introduces the principle of inertia, reduces the physical counterweight, realizes the improvement of the mass ratio of the device, and at the same time reduces the net elongation of the spring of the low-frequency structure controlled by the device. The invention introduces a negative stiffness nonlinear energy well element, which can capture resonance energy in a wide frequency range. The invention adopts the magnetic lead screw nut pair, which eliminates the friction between the lead screw and the nut, and improves the working efficiency. At the same time, the magnetic suspension thrust bearing is used together to ensure the normal operation of the flywheel suspended in the flywheel chamber.

Description

technical field [0001] The invention belongs to the field of vibration control devices for engineering structures, and in particular relates to a magnetic screw type eddy current damper with negative stiffness nonlinear energy wells. Background technique [0002] Structural vibration reduction using a tuned mass damper (TMD) is a kind of passive control technology for structural vibration. It is widely used in the field of engineering structures. Installing it in a vibrating bridge structure or high-rise building structure has a very obvious effect on structural vibration. inhibitory effect. [0003] However, when the stiffness of the TMD spring element vibrates at low frequencies, its theoretical stiffness decreases significantly at higher frequency bands, and its static elongation of the spring is very large, which cannot meet the use requirements. In order to solve the problem of the static elongation of the TMD spring, an inerter is introduced to combine with it. One of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/98E04H9/02
CPCE04H9/021
Inventor 封周权陈政清宋佳华旭刚牛华伟
Owner 湖南省潇振工程科技有限公司
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