This research deals with nonlinear dynamics of a permanent magnet freely levitated above a high-Tc superconductor(HTSC) excited in the vertical direction. Magnetic force and torque can be evaluated analytically by the advanced mirror image method as nonlinear functions of both displacement and roll angle of the magnet. Equations of 3 d.o.f. motion show that the magnet has two oscillation modes due to linear coupling of the horizontal and roll motions. The both modes can be excited by nonlinear coupling with vertical motion when the superconductor is exited vertically in the neighborhood of the sum of the natural frequency of each mode. Frequency response of this combination resonance was numerically simulated. This resonance was also observed in experiments.
|ジャーナル||American Society of Mechanical Engineers, Design Engineering Division (Publication) DE|
|出版ステータス||Published - 2001 12 1|
|イベント||2001 ASME International Mechanical Engineering Congress and Exposition - New York, NY, United States|
継続期間: 2001 11 11 → 2001 11 16
ASJC Scopus subject areas