School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China.
Department of Civil and Environmental, University of Maryland, College Park, MD 20742, USA.
Int J Environ Res Public Health. 2020 Mar 3;17(5):1648. doi: 10.3390/ijerph17051648.
This paper analyzes the influence of single and combined unfavorable road geometry on rollover and skidding risks of D-class mid-sized sport utility vehicles (SUVs) with front-wheel drive for roads with design speeds at 80 km/h. A closed-loop simulation model of human-vehicle-road interactions is established to examine the systematic influence of road geometry on vehicle rollover and skidding. The effects of different road geometry on rollover and skidding on SUVs are studied for pavement surface with good and poor friction when vehicles are in the action of steady state cornering. The rollover and skidding risks of the most unfavorable road segments are assessed. The critical wheel is defined by the threshold of skidding during curve negotiation. The results found that SUVs are not easy to rollover on the most unfavorable roads, regardless of good or poor friction of pavement surface. The safety margin of rollover is greater than that of skidding. The safety margin of skidding is minimal on poor friction roads. Therefore, for the sake of driving safety, it is not recommended to design the roads with these unfavorable road geometry combinations.
本文分析了设计时速为 80km/h 的道路上，单一路段不利道路几何形状和组合不利道路几何形状对前轮驱动 D 级中型运动型多用途汽车（SUV）侧翻和滑转风险的影响。建立了人-车-路闭环仿真模型，以检验道路几何形状对车辆侧翻和滑转的系统影响。研究了车辆在稳态转弯过程中，在路面摩擦性能良好和较差时，不同的道路几何形状对 SUV 侧翻和滑转的影响。评估了最不利路段的侧翻和滑转风险。通过曲线行驶时的滑转阈值来定义临界车轮。研究结果表明，无论路面摩擦性能好坏，SUV 在最不利的道路上都不容易发生侧翻。侧翻的安全裕度大于滑转的安全裕度。在摩擦性能较差的道路上，滑转的安全裕度最小。因此，为了驾驶安全，不建议设计具有这些不利道路几何形状组合的道路。
