Aerodynamic characteristics of superhigh speed vehicles under different crosswind conditions superhighways

doi:10.3969/j.issn.1674-8484.2025.01.008

Abstract

Abstract:

The influence of vehicle aerodynamic characteristics on superhigh speed driving safety was investigated. Static and dynamic models were built to simulate superhigh speed driving conditions of vehicles to analyze the driving stability of vehicles in crosswind environment. The automobile wind tunnel experiment simulation was used to analyze the stress of the vehicle on the curve road section and the straight road section, and to calculate the safe speed threshold. The parameters of the dynamic model were calibrated according to the simulation results. The driving trajectory of the vehicle under the influence of crosswind was simulated; A safety evaluation model was established. The results show that the safe driving speeds are 132, 111, and 81 km/h when the crosswind are the level 4, the level 6, and the level 8 respectively. Therefore, the safety of superhigh speed driving can be guaranteed when the crosswind is at or below level 5.

Key words: traffic safety, safe driving speed superhigh driving, crosswind environment, aerodynamic force, safety evaluation model

CLC Number:

U461.1
O355

HE Yongming, ZHAO Liyuan, WANG Fan. Aerodynamic characteristics of superhigh speed vehicles under different crosswind conditions superhighways[J]. Journal of Automotive Safety and Energy, 2025, 16(1): 77-85.

Figures/Tables 24

References 25

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轴距，l	2.703 m
车长，L	4.799 m
车身宽，W	1.888 m
车高，H	1.473 m
汽车质量，m	1.75 t
重心高度，h_g	580 mm

轴距，l	2.703 m
车长，L	4.799 m
车身宽，W	1.888 m
车高，H	1.473 m
汽车质量，m	1.75 t
重心高度，h_g	580 mm

路面类型	μ
良好沥青或混凝土路面	0.7~0.8
滚压过的土路	0.5~0.6
碾平的积雪道路	0.3~0.4

路面类型	μ
良好沥青或混凝土路面	0.7~0.8
滚压过的土路	0.5~0.6
碾平的积雪道路	0.3~0.4

θ / (°)	f / kN	F_Y / kN	侧滑判断
50	4.846	1.650	安全
60	4.896	1.830	安全
70	5.061	1.898	安全
80	5.226	1.928	安全
90	5.344	1.859	安全