NDLI: Suitable Structure of PM and Copper Plate Systems for Reducing Vibration Transmission and Improving Damping Effect in a Superconducting Seismic Isolation Device

Content Provider	IEEE Xplore Digital Library
Author	Sasaki, S. Shimada, K. Tsuda, M. Hamajima, T. Kawai, N. Yasui, K.
Copyright Year	2002
Abstract	We have investigated the basic properties of levitation force and vibration transmission in a magnetic levitation type superconducting seismic isolation device. Since it is very difficult in a real device of a seismic isolation device to keep the stationary levitation against any horizontal disturbances, we have devised a permanent magnet-permanent magnet (PM-PM) system with a copper plate and verified that the stable stationary levitation of the seismic isolation object could be achieved by using the PM-PM system with the copper plate. In addition, to improve the damping effect, we adopted vibration absorbing system composed of a copper plate and a permanent magnet. We investigated the basic properties of vibration transmission and damping effect in the model device having the PM-PM system with the copper plate and vibration absorbing system. The vibration transmission was reduced and the damping effect was greatly improved by the magnetic interaction between the copper plate and the permanent magnet in the PM-PM system with the copper plate and vibration absorbing system. We investigated the relationship between the magnetic interaction between the copper plate and the permanent magnet and obtained a suitable thickness of the copper plate in the PM-PM system and a suitable structure of vibration absorbing system for reducing the vibration transmission and improving the damping ratio effectively.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2233
Ending Page	2236
Page Count	4
File Size	290766
File Format	PDF
ISSN	10518223
Volume Number	21
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vibrations Copper Damping Superconducting magnets Magnetic levitation Magnetomechanical effects vibration transmission Damping effect HTS bulk seismic isolation device
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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

Suitable Shape and Arrangement of HTS Bulk and Permanent Magnet for Improving Levitation Force in a Magnetic Levitation Type Superconducting Seismic Isolation Device

Vibration Transmission Characteristics Against Vertical Vibration in Magnetic Levitation Type HTS Seismic/Vibration Isolation Device

Vibration Characteristics in Magnetic Levitation Type Seismic Isolation Device Composed of Multiple HTS Bulks and Permanent Magnets

Dependence of Horizontal Vibration Characteristics on Load Weight Distribution in Magnetic Levitation Type Seismic Isolation Device

Recent Up-Scaling in HTS Magnetic Device Technology

Increased Levitation Force in Magnetic Levitation System Using Magnetic Shielding Effect of HTS Bulk

Influence of Horizontal Vibrations on the Lateral Stability of Bulk High Temperature Superconductors

A High-Temperature Superconducting Magnetic Transmission Device

Suitable Structure of PM and Copper Plate Systems for Reducing Vibration Transmission and Improving Damping Effect in a Superconducting Seismic Isolation Device

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