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为了分析驾驶人制动行为下小客车在曲线路段的行车风险,综合考虑降雨、超速和道路线形等因素,利用CARSIM软件建立车辆动力学仿真模型,以临界附着系数和侧向加速度作为行车风险评价指标,基于数理统计理论,分析各因素的显著性,运用MATLAB软件建立曲线路段小客车行车风险评价模型。研究结果表明:车速和圆曲线半径对行车风险影响显著,制动力影响一般,道路超高的影响较小;当采取一般制动行为时,即使道路线形较差、车速较快且天气情况恶劣时,小客车基本也不会发生侧滑;当采取紧急制动行为时,若超速行驶,则不论道路线形及天气状况好坏,都有可能发生侧滑;在进行小客车行车风险评价时,满足了附着系数的要求,也即满足对侧向加速度的要求。
In order to analyze the driving risk of the passenger car in the curve section under the brake behavior of the driver, the vehicle dynamics simulation model was established by CARSIM considering the factors such as rainfall, speeding and road alignment. The critical adhesion coefficient and lateral acceleration were taken as the driving risk assessment Indicators, based on mathematical statistics theory, analysis of the salient factors, the use of MATLAB software to establish a curved section of passenger car driving risk evaluation model. The results show that: the speed of vehicle and the radius of circular curve have a significant impact on the driving risk, the influence of braking force is general, and the impact of ultra-high road is small; when the general braking behavior is adopted, even when the road alignment is poor, the speed is fast and the weather is bad , Small passenger cars basically do not occur side slip; when taking emergency braking behavior, if the speeding, regardless of the road shape and weather conditions are good or bad, are likely to occur side slip; in the evaluation of passenger car traffic risk to meet The adhesion coefficient requirements, that is to meet the requirements of the lateral acceleration.