超電導磁気浮上列車用FRP製荷重支持体の開発

概要

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A new type of load support system for the superconducting magnet of MAGLEV trains has been developed. This connects a coil case kept at liquid helium temperature (4.2K) with an outer case kept at ambient temperature (about 300K). Thus, this support system possesses low thermal conductivity as well as high stiffness and sufficient strength. In this paper we show how this new support system is developed. First, we define a characteristic parameter "specific stiffness" which is the product of support system stiffness multiplied by thermal resistance. Then, we evaluate this specific stiffness for various structural shapes, such as bars, cylinders and cones. On the basis of these evaluations we select a cone-shaped support system made of alumina-FRP. The optimization of cone angle and lamination angle by finite element analysis is discussed. Finally, measured results from several new cone-shaped support systems are presented, including thermal conductivity, stiffness, stress distributions and strength.
一般社団法人日本機械学会の論文
1996-06-25