524 磁界の周期的時間変動を受ける導体中空円筒の電磁熱弾性問題(OS-4 熱弾性・等温弾性(2))

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In the present article, a theoretical treatment of magnetothermoelastic stresses and deformation by cyclic time variation of magnetic field is dealt with in a conducting hollow circular cylinder subjected to both internal heat generation due to eddy current loss and Lorentz force. Assuming that uniform magnetic field whose intensity varies sinusoidally in time acts on the hollow circular cylinder in the direction parallel to its outer surface, plane axisymmetrical magnetic field and the associated eddy current in the hollow circular cylinder due to electromagnetic induction have been formulated based on the theory of quasi-stationary electromagnetic field. Therefore, stresses and deformation in a conducting hollow circular cylinder, which are subjected to both plane axisymmetrical temperature change due to eddy current loss and Lorentz force, have been analyzed under plane strain condition. Carrying out numerical calculations, we examine the effects of the frequency in cyclic variation of magnetic field on the electro-magnetic field and radius ratio of the hollow circular cylinder, current density, temperature change and stress and deformation in the hollow circular cylinder.
社団法人日本機械学会の論文
2004-03-17