长大下坡路段重型车辆刹车毂温度模型研究

山区公路由于地形的限制存在较多的长大纵坡，山区公路交通事故资料显示，一半以上的交通事故发生在长大下坡路段．重型车辆在长大下坡路段刹车毂温度过高致使制动失灵是事故的主要原因。综合考虑车辆载重、车速、坡长、坡度等因素，设计刹车毂温度现场试验，应用统计学的理论建立刹车毂温度回归模型，预测的刹车毂温度值可为长大下坡路段避险车道位置的选定提供依据。

Temperature Model of Brake Drum at Long and Steep Downgrades

Large longitudinal slopes exist in mountainous highway because of the restriction of terrain. Statistical data of traffic accidents shows that more than half of the traffic accidents occurred in the sections of large longitudinal slopes. Failure braking resulting from high-temperature brake drum of heavy load vehicles is the main cause. Based on statistical analysis, brake drum experiment is developed to establish the prediction model of brake drum temperature. The result will provide evidence for determining the location of emergency lane at large longitudinal slopes of mountainous highway.