RTRI REPORT November 2001
PAPERS

Study of Reducing the Mechanical Loss inside the Inner Vessel

Hiroshi SEINO, Minoru KURIHARA,
Toshiki HERAI, Eiji SUZUKI


  In the superconducting MAGLEV system, trains are operated by the electrodynamic suspension force between ground coils and on-board superconducting magnets (SCMs). When the train runs, the SCMs are vibrated at various frequencies according to the train speed by the electromagnetic disturbance which is caused when the train passes over ground coils. Eddy current and mechanical loss are generated inside the SCM under vibration. This phenomenon increases the heat load on the cryogenic equipment in the SCM. It has been surmised that the mechanical heat inside the inner vessel is generated by the frictional heat caused by the relative microscopic slips between fasteners and a superconducting coil (SC coil). In this study, we suggest a hypothesis that the frictional heat generated by the relative microscopic slips between the fasteners and a SC coil will be indicated if the calculated strain distribution on the SC coil evaluated. The results of mechanical SC coil vibration tests and SC coil strain distribution analysis supported this hypothesis.


* Full papers of RTRI Report are written in Japanese.

Copyright (c) 2001 Railway Technical Research Institute