Effects of section parameters on rain loads on high-speed trains under crosswind

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.