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Magnetically Tunable Vibration Transmissibility for Polyurethane Magnetic Elastomers
Hiroyuki Endo1,2, Shunsuke Kato3,4, Mayuko Watanebe5
1Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan. f16b003c@mail.cc.niigata-u.ac.jp.
Abstract:
The effect of a weak magnetic field on vibration transmissibility was investigated for magnetic elastomers with various volume fractions of magnetic particles. Polyurethane elastomers without magnetic particles exhibited a natural frequency at 53 Hz and were insensitive to a magnetic field of 60 mT. The natural frequency for magnetic elastomers with a volume fraction of 0.23 was 115 Hz at 0 mT, and increased to 134 Hz at 60 mT. The vibration transmissibility was independent of the magnetic field. A linear relation between the natural frequency and (G/m)1/2 was observed (G: storage modulus, m: mass), indicating that the observed vibration is basically described by a simple harmonic oscillation.
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