Evaluation of the Structural Dynamics of a 2G HTS Magnet System Considering Electromagnetic and Thermal Stress

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Magnetically levitated (maglev) trains with superconducting technology has been developed rapidly in recent decades due to such promising features as high cruising speed. The second-generation high-temperature superconducting (2G HTS) magnets used on maglev trains are state-of-the-art among different types of magnets, like permanent magnets, electromagnets, or low-temperature superconducting magnets. A series of works have been done by the group on the development of the 2G HTS maglev, including optimal design, manufacturing, and testing of the ground propulsion system and on-board 2G HTS magnet system. In this work, as a continuation of the development progress, the structural dynamics of the on-board 2G HTS magnet system are evaluated. Since the HTS magnets are operated in a cryogenic environment featuring large current inflows, consideration of both the electromagnetic and thermal stresses on the maglev's structural dynamics is necessary. Modal analysis, harmonic response, random vibration, and shock response are conducted, based on standard IEC 61373. Fatigue assessment is also provided.