Open AccessDesign of a Magnetic Negative-stiffness-damper for Vibration Isolation
Author(s) -
Hangfei Zhou,
Shaorong Xie,
Yi Sun
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1549/2/022063
Subject(s) - vibration isolation , isolator , damper , magnet , stiffness , vibration , coil spring , structural engineering , spring (device) , materials science , acoustics , physics , engineering , electrical engineering
This paper presents a novel low frequency vibration isolator. The isolator is mainly composed of a coil spring, two permanent magnets and a number of copper plates of different thickness. The negative stiffness provided by the two permanent magnets is offset by the positive stiffness of the spring, thus reducing the natural frequency of the system and broadening the isolating bandwidth. When the magnet moves, it creates eddy current damping on the copper plate. The movement of the permanent magnet and copper form a viscous damper. This makes up for the disadvantage that the isolator cannot dissipate the vibration energy. Principle of the novel vibration isolator is introduced. The optimum configuration of the vibration isolator was obtained by experiments.