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Aerodynamic analysis of trains with different longitudinal section lines under crosswind was studied using the CFD methods in this paper. The slopes of five different longitudinal section lines are 0.58, 0.54, 0.5, 0.46, 0.42, respectively. The results show that the drag coefficient increases 27.6% and the lift force increases 12.3% with the slope of longitudinal section line increases from 0.42 to 0.58, but the lateral force varies little. The drag coefficient and lift force increasedoi:10.12783/dtetr/icia2017/15705 fatcat:7qvvmdqfwrglzez2tenmrb2z34