Potentiality of a novel elastomagnetic attenuator for vibration control

Abstract A novel elastomagnetic attenuator was developed and tested. The innovation lies in the use of permanent magnets instead of non-magnetic parts in the standard attenuator devices made of alternating elastomeric and rigid metallic elements. In this way, the standard mechanism of passive energy dissipation is reinforced by the action of magnetic forces which can be non-linear and therefore introduce asymmetric strain dependent forces. The performed experimental tests reveal the advantages and the limits of the new attenuator device in contrasting vibrations of a simple structure. The elastomagnetic attenuator shows good vibration control, in terms of amplitude damping and resonance frequency shift towards higher values, for longitudinal oscillations propagating parallel to the main magnetic forces axis and transmitted from the outside through the base of the structure to be protected.

[2]  Robert J. Bernhard,et al.  ADAPTIVE-PASSIVE ABSORBERS USING SHAPE-MEMORY ALLOYS , 2002 .

[3]  Huibin Xu,et al.  Giant magnetostrictive actuators for active vibration control , 2004 .

[4]  Amr M. Baz,et al.  The Dynamics of Helical Shape Memory Actuators , 1990 .

[5]  H. Conrad,et al.  Vibration Characteristics of a Composite Beam Containing an Electrorheological Fluid , 1990 .

[6]  Guang Meng,et al.  Vibration control of piezoelectric smart structures based on system identification technique: Numerical simulation and experimental study , 2006 .

[7]  Cornelia Hison,et al.  Mechanical vibration sensor based on elastomagnetic composite , 2006 .

[8]  P. P. Friedmann,et al.  Magnetostrictively actuated control flaps for vibration reduction in helicopter rotors , 1994 .

[9]  V. Iannotti,et al.  Linearity of the direct elastomagnetic effect: evaluation and limits , 2007 .

[10]  Marc Thomas,et al.  An innovative magnetorheological damper for automotive suspension: from design to experimental characterization , 2005 .

[11]  J. L. Sproston,et al.  Applications of electro-rheological fluids in vibration control: a survey , 1996 .

[12]  Yi-Qing Ni,et al.  A magnetorheological damper capable of force and displacement sensing , 2010 .

[13]  Billie F. Spencer,et al.  Large-scale MR fluid dampers: modeling and dynamic performance considerations , 2002 .

[14]  He Xia,et al.  Environmental problems of vibrations induced by railway traffic , 2007 .

[15]  Mehrdad N. Ghasemi-Nejhad,et al.  Frequency-weighted adaptive control for simultaneous precision positioning and vibration suppression of smart structures , 2004 .

[16]  Alexander Veprik,et al.  VIBRATION PROTECTION OF SENSITIVE ELECTRONIC EQUIPMENT FROM HARSH HARMONIC VIBRATION , 2000 .

[17]  S. C. Pradhan.  Vibration suppression of FGM shells using embedded magnetostrictive layers , 2005 .

[18]  Cornelia Hison,et al.  STATE OF THE ART AND DEVELOPMENT TRENDS OF NOVEL NANOSTRUCTURED ELASTOMAGNETIC COMPOSITES , 2004 .

[19]  Yang Ping,et al.  A review on protection technology development for equipments in vibration and impact environment , 2008 .

[20]  Mao-Hsiung Chiang,et al.  Design and performance evaluation of a serial multi-electrode electrorheological damper , 2006 .