Numerical evaluation of natural frequency change of a ferromagnetic plate due to magnetic stiffness effect

Author

Takagi, T. ; Tani, J. ; Ruatto, P. ; Krevet, B. ; Boccaccini, L.V.

Author_Institution

Inst. of Fluid Sci., Tohoku Univ., Sendai, Japan

Volume

32

Issue

3

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

1054

Lastpage

1057

Abstract

This paper describes the numerical simulation of the dynamic behavior of a ferromagnetic thin plate vibration in a magnetic field. The behavior of a ferromagnetic cantilevered plate, which is set in the direction of a uniform magnetic field, shows that its natural frequency increases with the external magnetic induction. Two methods were applied to evaluate this phenomenon. The magnetic field of the deformed shape has been analyzed by 3D analysis and 1D approximation. The natural frequencies were evaluated by the energy method in the 3D case and by a transient response in the 1D case. The results show that the natural frequency change can be explained by the magnetic stiffness effect caused by magnetization including its saturation

Keywords

approximation theory; electromagnetic induction; ferromagnetism; magnetic fields; magnetisation; magnetomechanical effects; transient analysis; vibrations; 1D approximation; 3D analysis; cantilevered plate; deformed shape; dynamic behavior; energy method; external magnetic induction; ferromagnetic plate; magnetic field; magnetic stiffness effect; magnetization; magnetomechanical behaviour; natural frequency change; numerical evaluation; saturation; thin plate vibration; transient response; Copper; Damping; Frequency; Fusion reactors; Magnetic analysis; Magnetic fields; Magnetic materials; Magnetostatics; Numerical simulation; Saturation magnetization; Shape; Superconducting magnets; Transient response;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.497422

Filename

497422