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Ball screw type eddy current damper with negative-stiffness nonlinear energy trap

A non-linear energy trap and eddy current damper technology, applied in the field of structural vibration reduction, can solve the problem of magnetic leakage of the eddy current damper that has not been solved, and achieve a convenient modular assembly, good robustness, and wide control frequency band. Effect

Active Publication Date: 2020-12-25
湖南省潇振工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the device does not solve the magnetic flux leakage problem of the eddy current damper

Method used

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  • Ball screw type eddy current damper with negative-stiffness nonlinear energy trap
  • Ball screw type eddy current damper with negative-stiffness nonlinear energy trap
  • Ball screw type eddy current damper with negative-stiffness nonlinear energy trap

Examples

Experimental program
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Embodiment Construction

[0047] This embodiment discloses a vertically tuned mass ball screw type inertial eddy current damper with negative stiffness nonlinear energy well, such as Figure 1 to Figure 6 As shown, the support frame 12 divides the outer frame 8 into two layers; The top and bottom surfaces of the lower layer are affixed. The mass block 3 is slidably sleeved on the guide rod 7; the free end of the spring 6 is fixedly connected to the mass block 3, and the fixed end of the spring 6 is connected to the support frame 12 or the outer frame 8 fixed connection. The iron plate 4 is attached to the inner wall surface of the upper or lower layer where the mass block 3 is located; the conductor plate 2 is attached to the surface of the iron plate 4; the alternating permanent magnet group 1 is arranged on the The vertical side of the mass block 3, and there is a set gap between the alternating permanent magnet group 1 and the conductor plate 2. The ball screw 5 is vertically arranged, and the fi...

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Abstract

The invention provides a ball screw type eddy current damper with a negative-stiffness nonlinear energy trap. The ball screw type eddy current damper comprises an outer frame, a vertically-arranged guide rod, a supporting frame, a mass block, a spring, an alternate permanent magnet set, a conductor plate and an iron plate, wherein a set gap is reserved between the alternate permanent magnet set and the conductor plate. The damper further comprises a vertically-arranged ball screw, a nut, a flywheel and a thrust bearing. The damper further comprises a homonymous permanent magnet set and / or a synonymous permanent magnet set which can generate the negative-stiffness nonlinear energy trap effect. When vibration energy of a controlled structure is transmitted to the damper, the mass block is caused to vibrate up and down, the homonymous permanent magnet set and / or the synonymous permanent magnet set capture / captures resonance energy within a wide frequency range, the ball screw drives theflywheel to rotate at a high speed to generate the inertia mass effect, the conductor plate cuts magnetic induction lines of the alternate permanent magnet set, and the eddy current damping effect isformed; and back iron can reduce magnetic flux leakage and improve the damping energy consumption efficiency.

Description

technical field [0001] The invention belongs to the technical field of structural vibration reduction, and in particular relates to a ball screw type eddy current damper with a negative stiffness nonlinear energy well. Background technique [0002] Tuned mass dampers are widely used in the field of vibration reduction of bridges, high-rise buildings and other engineering structures. It has been proved by theory and practice that tuned mass dampers have a good effect on the control of structural vibration, but the traditional vertical tuned mass damper There are two problems in the device, one is the durability problem, the other is the spring static elongation problem, and the third is the frequency imbalance problem. Facing the needs of rapid social development, it is necessary to solve the above-mentioned problems of the tuned mass damper and to optimize and improve it. [0003] The eddy current damping technology has the characteristics of non-contact and good controllab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/98E04H9/02F16F9/32F16F9/53
CPCE04H9/021F16F9/535F16F9/32
Inventor 封周权陈政清华旭刚牛华伟陈智刘易
Owner 湖南省潇振工程科技有限公司
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