First-Passage Analysis of Electromagnetic Levitation System under Track Irregularity Excitation

Considering the cumulative effect of track irregularity, it is necessary to make the electromagnetic levitation system not only have good running stability, but also to maintain high reliability and long-term good working condition. It is urgently needed to carry out random vibration analysis and structural reliability analysis of the system. In view of this, this paper sets up a theoretical framework based on the probability density evolution method to carry out the first-passage analysis of the levitation system on a high-speed maglev train. The probability density evolution information of the gap in the levitation system under the excitation of track irregularity is analyzed. The influence of track irregularity excitation on the first-passage time of the levitation system is further studied.