关键词: 车辆上下台阶；通过性；数学建模；ADAMS 仿真分析

Abstract: Passing capacity is one of the important performances of vehicles and step road is a kind of common terrains related to passing capacity. The ability of M-class vehicles to pass through step road is required by China national standard Motor Vehicles Passing Capacity Test Method (GB/T 12541 －2023). In this paper, the step road's passing capacity is studied based on mathematical modeling and simulation analysis with ADAMS. The minimum ground clearance of each system is analyzed when the vehicle pass through a specific step road. The calculations show that the mudguard II and the exhaust system bump with the ground when driving down the step road, and structural optimization is needed. The research method in this paper can be extended to other terrains related to passing capacity. Efficient evaluation of terrain passing capacity in vehicle design stage can help to identity and avoid collision risks in advance, save test resources, and shorten the development cycle.

Key words: Vehicles to pass through step road; Passing capacity; Mathematical modeling; Simulation analysis with ADAMS