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A pendulum type eddy current tmd magnetic circuit structure design method and device

A design method, eddy current technology, applied in design optimization/simulation, computer-aided design, calculation, etc., can solve the problem of low energy consumption efficiency of pendulum eddy current TMD, achieve fast and accurate energy consumption efficiency, and improve design and manufacturing level, usage reduction and cost effects

Active Publication Date: 2020-10-09
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a pendulous eddy current TMD magnetic circuit structure and design method and device for the problems and deficiencies of the low energy consumption efficiency of the pendulum eddy current TMD in the prior art

Method used

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  • A pendulum type eddy current tmd magnetic circuit structure design method and device
  • A pendulum type eddy current tmd magnetic circuit structure design method and device
  • A pendulum type eddy current tmd magnetic circuit structure design method and device

Examples

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Embodiment 1

[0037] Example 1: Combining Figure 1-Figure 13 , a design method of a pendulous eddy current TMD magnetic circuit structure, specifically comprising the following steps:

[0038] Determine the design parameters of eddy current TMD: mass m, vibration frequency f and damping ratio ζ;

[0039] Calculate the target value c of the equivalent damping coefficient of the eddy current damper TMD =2m(2πf)ζ;

[0040] Determine the type and size of the rectangular permanent magnet 2, the length and width of the permanent magnet 2 are denoted as b, and the height is denoted as h;

[0041] Design the reference unit of the eddy current damper composed of four permanent magnets 2, specifically including: along the direction of TMD movement, the magnetic poles of adjacent permanent magnets are arranged alternately with a distance of 0.5b; along the direction perpendicular to the direction of TMD movement, the magnetic poles of adjacent permanent magnets are arranged The same arrangement, t...

Embodiment 2

[0046] Example 2, combined with Figure 1-Figure 13 , a design method for the magnetic circuit structure of an eddy current tuned mass damper,

[0047] Such as figure 1 The reference unit of the eddy current damper shown, the Lorentz force F received by the conductor copper plate 3 and the velocity v of the conductor copper plate 3 obtained through the three-dimensional electromagnetic field finite element simulation give the equivalent damping coefficient c of the eddy current damping J ,

[0048]

[0049] Eddy current damper reference unit damping ratio ζ J can be determined by

[0050] In the formula, m and f represent the mass and vibration frequency of the eddy current TMD moving mass, respectively.

[0051] Combining formulas ① and ②, the damping ratio formula of the pendulum eddy current TMD is obtained:

[0052]

[0053] Eddy current damper equivalent damping coefficient target value c TMD =2m(2πf)ζ③, where ζ represents the target damping ratio.

[0054]...

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Abstract

The invention belongs to the technical field of structure vibration control, and particularly relates to a pendulous electric eddy current TMD magnetic circuit construction design method and device. The design method comprises the steps of determining an electric eddy current TMD design parameter; calculating an electric eddy current damper equivalent damping coefficient target value; determining the model and the size of a rectangular permanent magnet; designing an electric eddy current damper reference unit constituted of multiple permanent magnets; calculating an equivalent viscous damping coefficient cJ of the electric eddy current damper reference unit; determining the number of the electric eddy current damper reference unit n=Ctmd / cJ, that is, the total number of the permanent magnets is 4n. According to the pendulous electric eddy current TMD magnetic circuit construction design method and device, the energy consumption efficiency of electric eddy current damping is remarkably improved, the using quantity and the cost of the damping material are lowered, compared with the situation that the damping ratio reaches 4.5% when some large-scale pendulous electric eddy current TMD in the prior art is in a small displacement range and a copper plate with the thickness of 8 mm and 1800 permanent magnets are adopted, the damping ratio can reach 7.81% by adopting only 40 permanent magnets, and the using quantity of the permanent magnets is drastically lowered; using the design method and device, a pendulous electric eddy current TMD which has good energy consumption efficiency and meets requirements can be fast and precisely designed.

Description

technical field [0001] The invention belongs to the technical field of structural vibration control, and in particular relates to a pendulum-type eddy current TMD magnetic circuit structure and design method. Background technique [0002] Super high-rise buildings are prone to large-scale vibrations under wind loads, leading to comfort problems. In order to improve the wind-induced comfort of such structures, many super high-rise buildings have adopted large pendulum tuned mass dampers (TMD) to reduce vibration. Large-scale pendulum TMD dampers mostly use liquid viscous dampers, but the viscous fluid of this type of damper may leak over time, difficult to adjust damping parameters later, internal heat is not easy to dissipate, and long-term performance is difficult to guarantee. Eddy current damping is an alternative solution to this problem. [0003] According to the calculation formula of pendulum eddy current TMD damping ratio It can be seen that in order to meet the d...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F119/14
CPCG06F30/23G06F2119/06
Inventor 汪志昊田文文王浩郜辉张正亚高郁斌靖金亮马逵汪志华王丽娟钱晓军朱倩
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER