- 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: | XIE Hongtai, WANG Hong. Influence of Longitudinal Layout Density of Aerodynamic Braking Devices on Braking Effect of High-Speed Trains[J]. Journal of Southwest Jiaotong University, 2026, 61(1): 253-264. doi: 10.3969/j.issn.0258-2724.20240219
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To further investigate the synergistic layout of aerodynamic braking devices on high-speed trains operating at 400 km/h and above and to clarify the overall braking benefit and efficiency of aerodynamic braking systems suitable for China’s current standard trainsets, the shape of the CR400AF platform and the configuration of its basic braking system were taken as a reference. Different numbers of “butterfly-type” aerodynamic braking devices were installed, and the aerodynamic characteristics of high-speed trains equipped with such devices under different operating conditions were simulated and calculated. A direct integration method applicable to aerodynamic braking problems was proposed. The braking performance of trains relying solely on aerodynamic braking devices at a given initial speed was compared with coasting to stop, and the braking effect was analyzed. Train braking equations were established, and the segmented accumulation method was used to calculate the braking distance and time when aerodynamic braking was combined with service braking and emergency braking. The results show that the installation of aerodynamic braking devices significantly increases the overall aerodynamic resistance of trains, and higher layout density leads to stronger aerodynamic interference between front and rear braking plates. The composite braking method combining aerodynamic braking effectively compensates for insufficient adhesive braking force at high speed, while addressing the low braking efficiency of aerodynamic braking at low speed. The combined braking distance is proportional to the square of the speed, and the braking time is proportional to the speed. With combined aerodynamic braking, the emergency braking distance from an initial speed of 350 km/h can be reduced to
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