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Nonlinear Oscillation of an Elastic Body Supported by High-Tc Superconducting Magnetic Bearings

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4 Author(s)
Iori, T. ; Keio Univ., Yokohama ; Ogawa, S. ; Sugiura, T. ; Yoshizawa, M.

This research deals with nonlinear dynamics of an elastic bar supported at both its ends by electromagnetic forces from high-Tc superconducting bulks, under vertical excitation. Experimental results show parametric resonance of an asymmetric mode consisting of pitching motion and deflection in a symmetric system. This resonance has nonlinear characteristics such as soft-spring response and hysteresis. It was also confirmed by numerical analysis. Nonlinearity originated in electromagnetic forces caused this resonance.

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Applied Superconductivity, IEEE Transactions on  (Volume:17 ,  Issue: 2 )