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Relative vibration attenuation by means of self‐active devices constituted by permanent magnets separated by silicone layers
Author(s) -
Ricciardi Enrico,
Ausanio Giovanni,
Iannotti Vincenzo,
Pasquino Vittorio,
Silvestri Brigida,
Lanotte Luciano
Publication year - 2017
Publication title -
structural control and health monitoring
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.587
H-Index - 62
eISSN - 1545-2263
pISSN - 1545-2255
DOI - 10.1002/stc.1914
Subject(s) - attenuator (electronics) , vibration , attenuation , magnet , structural engineering , stiffness , acoustics , amplitude , rotor (electric) , materials science , excitation , coupling (piping) , engineering , physics , electrical engineering , optics , composite material
Summary The relative vibrations of two small frames with different stiffness, subjected to the same oscillating excitation coming from their base platform, were investigated. The effects of the innovative coupling of standard passive attenuation and time variation of magnetic forces (self‐produced by the vibration itself) were investigated. The first experimental tests demonstrate that the amplitude of relative vibration can be easily decreased up to 75% without requiring external energy. In perspective, by varying the attenuator shape and power, it is possible to use it in all the cases in which it is necessary to reduce the vibrations of a breakable or unstable structure inside a building accidentally exposed to vibration, such as a rotor inside a frame or a shelf in a museum room. Copyright © 2016 John Wiley & Sons, Ltd.