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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 104
PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 28

Effects of Section Parameters on Rain Loads on High-Speed Trains under Crosswind

C.H. Xu, C.W. Jiang, Z.X. Gao and C.H. Lee

National Laboratory for Computational Fluid Dynamics, School of Aeronautics Science & Engineering, Beihang University, China

Full Bibliographic Reference for this paper
C.H. Xu, C.W. Jiang, Z.X. Gao, C.H. Lee, "Effects of Section Parameters on Rain Loads on High-Speed Trains under Crosswind", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 28, 2014. doi:10.4203/ccp.104.28
Keywords: high-speed train, rain load, sectional parameter, crosswind, heavy rain, numerical simulation.

Summary
Five two-dimensional high-speed train models are researched in this paper, and rain load on the model under crosswind and rain are calculated. The crosswind speed ranges from the maximum speed of level 8 12 of the Beaufort wind scale, and the rainfall intensity ranges from 100 300mm/h. By introducing the assumption of equivalent impact velocity, equivalent angle and equivalent impact area, an estimation formula for rain load is established. The fitting curves of the cross force and overturning moment correspond well with calculation, while the discrepancy between the fitting curve for the vertical force and calculation is within 10%. Rain load coefficients are obtained by fitting. Results indicate that the equivalent impact area and the rain load coefficients are key parameters, and the product of these two parameters determines the rain load. Besides, the estimation formula reveals that rain load is proportion to the rainfall intensity and is non-linear correlation to the crosswind speed, which corresponds with the calculation.

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