- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | ZHANG Mingliang, YANG Xinmeng, ZHANG Lianpeng, LI Mingyuan, LIU Liru. Dynamic Characteristics and Performance Assessment of Improved Suspension Frame System[J]. Journal of Southwest Jiaotong University, 2023, 58(4): 827-835. doi: 10.3969/j.issn.0258-2724.20220885
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In order to improve the levitation force and enhance the safety of high-temperature superconducting pinned maglev trains, an improved rail-holding suspension frame system was proposed. Firstly, the levitation force between high-temperature superconductor arrays and permanent magnet guideways was calculated based on the equivalent processing method. The levitation forces of high-temperature superconductor arrays and permanent magnet guideways were also measured by the levitation force test device, which validated the equivalent processing method experimentally. Then, the levitation force of the improved suspension frame system was obtained based on the equivalent processing method. According to the relationship between levitation force and levitation gap, the dynamic model of a single improved suspension frame was set up under track irregularity harmonic excitation. The amplitude-frequency equation was derived by linear differential equation theory. Lastly, the influence of running velocity and damping on the steady-state amplitude was investigated. The feasible domain of damping under the maximum running velocity was obtained. The results show that the steady-state amplitude is dependent on the running velocity and damping under a certain mass, stiffness, and track irregularity wave length and amplitude. In addition, the steady-state amplitude increases as the running velocity improves, or as the damping decreases. With the maglev safety index as the constraint, the damping should be more than 6 905 Ns/m under the maximum running velocity of 600 km/h.
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