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将车辆运行速度、路面摩擦因数作为随机变量,分别构建了基于质点模型与考虑车辆侧倾作用的侧滑失效功能函数,分析了曲线路段行车安全可靠性。计算了《公路工程技术标准》(JTGB01—2003)中规定的各极限最小半径下发生车辆侧滑的概率,并通过改变路面摩擦因数和车辆运行速度,对比研究了2种不同功能函数下的行车失效概率,提出了公路平曲线半径的可靠性设计流程。研究结果表明:考虑车辆侧倾作用计算的侧滑概率明显高于由质点模型计算出的侧滑概率;在同样道路环境下,卡车发生侧滑的概率会大于轿车;公路平曲线设计将车辆简化为质点,忽略侧倾作用以及车型间差异会导致对卡车行驶安全不利。
Taking the vehicle running speed and pavement friction coefficient as random variables, the function of sliding failure based on particle model and vehicle roll is constructed respectively, and the driving safety and reliability of curved section are analyzed. The probability of vehicle skidding occurred under the minimum radius specified in “Technical Standards for Highway Engineering” (JTGB01-2003) was calculated. By changing the friction coefficient of road surface and the running speed of vehicle, the driving performance under two different function functions Failure probability, the reliability design flow of highway curve radius is proposed. The results show that the probability of side slip considering vehicle roll behavior is significantly higher than that calculated from particle model. In the same road environment, the probability of side-slip truck is greater than that of sedan. For the sake of quality, neglecting the effects of roll and the differences between vehicle types can result in adverse safety of the truck.