The Design of Linear Magnetic Negative Stiffness Element for Engineering Application using Rectangular Permanent Magnets

Zhenhua Zhou; Shuhan Chen; Xin Liu

doi:10.4283/JMAG.2020.25.2.172

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한국자기학회
Journal of Magnetics 학술저널
Journal of Magnetics Vol.25 No.2
2020.6 172 - 180 (9page)
DOI : 10.4283/JMAG.2020.25.2.172

저자정보

Zhenhua Zhou (Changsha University of Science &Technology)
Shuhan Chen (Changsha University of Science &Technology)
Xin Liu (Changsha University of Science &Technology)

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초록·키워드

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Negative stiffness element (NSE) has extensive uses in engineering applications, such as vibration isolation, energy harvesting, and mechanical metamaterial. However, to realize a linear negative stiffness characteristic is still a challenging task. In this paper, we present a compact magnetic negative stiffness element (MNSE) that composed of three rectangular permanent magnets and configured as repelling configuration in horizontal to realize linear negative stiffness characteristic. The effects of the MNSE configuration parameters on the negative stiffness characteristic are analyzed in detail. The results demonstrate that the magnitude of the negative stiffness characteristic can be adjusted by changing the height ratio and width ratio between the central and outer magnets. The height difference between the central and outer magnets can be used to tune the degree of nonlinearity of the negative stiffness characteristic and to get the uniformity stiffness characteristic in the equilibrium position. The procedure to realize the linear negative stiffness characteristic with the expected magnitude and displacement range is developed and confirmed. The proposed MNSE and the design procedure offer an engineering application foundation for the magnetic linear negative stiffness.

#permanent magnet #linear negative stiffness characteristic #negative stiffness element #vibration isolation

1. Introduction
2. The Configuration and Modeling of the MNSE
3. Effects of Configuration Parameters on the Negative Stiffness Characteristic
4. Analysis on the linear Negative Stiffness Characteristic of MNSE
5. Design procedure for the linear negative stiffness of the MNSE
6. Conclusion
References