Vibration Transmission Analysis on a Superconducting Seismic Isolation Device With PM and Copper Plate Systems

Author

Sasaki, S. ; Shimada, K. ; Katana, T. ; Miyagi, D. ; Tsuda, Makoto ; Hamajima, T. ; Kawai, N. ; Yasui, K.

Author_Institution

Dept. of Electr. Eng., Tohoku Univ., Sendai, Japan

Volume

22

Issue

3

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

3600804

Lastpage

3600804

Abstract

We have devised a magnetic levitation type superconducting seismic isolation device using pinning effect of HTS bulk and investigated the characteristics of vibration transmission and damping in a model device with two types of permanent magnet (PM) systems with copper plates; the one was for stable stationary levitation named “PM-PM system” and the other was for improving damping effect named “vibration absorbing system (VAS)”. To clarify the electromagnetic behaviors of these systems, we calculated the distributions of eddy current and magnetic force within the copper plates during a horizontal vibration using a numerical simulation code based on the three-dimensional finite element method (3D-FEM) analysis. As the results, the vibration transmission was reduced due to the Lorenz force generated in the copper plate.

Keywords

copper; damping; eddy currents; finite element analysis; magnetic forces; magnetic levitation; permanent magnets; superconducting devices; vibration isolation; 3D-FEM analysis; HTS bulk; Lorenz force; PM-PM system; copper plate systems; damping effect; eddy current distributions; electromagnetic behaviors; magnetic force; magnetic levitation; numerical simulation code; permanent magnet systems; superconducting seismic isolation devices; three-dimensional finite element method analysis; vibration absorbing system; vibration transmission analysis; Damping effect; HTS bulk; seismic isolation device; vibration transmission;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2012.2186429

Filename

6172655