- 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: | LU Jing, MA Weihua, LI Miao, LUO Shihui, WANG Bo, XU Aokang. Motion Decoupling and Dynamic Response of Permanent Magnet Maglev Bogie[J]. Journal of Southwest Jiaotong University, 2025, 60(4): 930-943. doi: 10.3969/j.issn.0258-2724.20250162
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To address levitation and guidance performance deficiencies in permanent magnet maglev “Red Rail” train bogies, an innovative bogie scheme was proposed, and dynamic analyses were performed. First, the finite element method was used to analyze the Halbach array’s magnetic field and force characteristics and clarify the influence of lateral offset of the permanent magnet on guidance performance and that of motion decoupling on stable levitation. Next, the innovative bogie’s structural design was detailed, and a vehicle system dynamics model was built to investigate the dynamic responses of key bogie components during straight-line operation and passing through a 50-m radius curve (R50). Finally, the impact of free gaps and stiffness of lateral wheels on bogie impact vibration was explored. The results show that when the free gap of lateral wheels is 0, and the stiffness is 6 × 106 N/m, bogie impact vibration is effectively suppressed. When the train passes through a curve, the bogie balances centrifugal force by keeping lateral wheels in close contact with the inner curve side under the lateral offset force of a permanent magnet, which is distinct from traditional rail vehicle dynamics. When the speed is no more than 60 km/h, the lateral and vertical ride quality indices of no-load (AW0) vehicles outperform those in overload (AW3), with both indices controlled below 2.5.
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