- 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 Baoan, YU Dalian, LI Haitao, LIANG Xin, HUANG Chao. Influence of Flexibility Characteristics of Levitation Chassis on Curve Negotiation Performance of High-Speed Maglev Vehicle[J]. Journal of Southwest Jiaotong University, 2022, 57(3): 475-482. doi: 10.3969/j.issn.0258-2724.20210635
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In order to investigate the small curve negotiation performance of high-speed maglev trains, the flexible vibration of the levitation chassis is explored, and the finite element model of levitation chassis is established to calculate its elastic modes; then the dynamics model of the high-speed maglev vehicle is built. According to the track conditions, speed curve and fitted track irregularities from Tongji University’s maglev test line, the influence of flexible vibration of levitation chassis is analyzed on the gap and electromagnetic force of guidance and levitation electromagnet. Meanwhile, a dynamics model of a rigid levitation chassis is built for comparison purpose. The results show that the dynamic performance of electromagnet is greatly affected by flexible vibration of the levitation chassis when the negotiating curve has a smaller radius of 400 m. The difference of the guidance force between the two models is about 12.5 kN, while the difference of the levitation force is 6.0 kN or so. The comparison with the simulation demonstrates that the results from the model of the levitation chassis flexibility is more close to the test results. The main frequencies of the vertical and lateral levitation chassis vibration are 10.4 Hz and 13.2 Hz respectively, which are similar to modal frequencies of relative pitching and anti-phase yawing between the front and rear levitation frame. The flexibility of levitation chassis should be taken into account in the key issues of high-speed maglev trains, such as control parameter optimization, suspension parameter optimization, and running stability.
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