车轮随机动载与路面及车速相互关系的研究

Effect of vehicle speed and roadway surface condition on the random dynamic loads of the wheels

文章利用车辆的两自由度模型 ,分析了车速与路面不平度对车轮随机动载的功率谱密度和方差变化趋势的影响。同时也分析了车轮随机动载的大小对路面疲劳应力的影响 ,指出了不同的车速和路面状况引起的路面动力反应及损伤变化规律的不同 ,提出了针对路面状况来调整车速可以降低车轮随机动载 ,从而达到减轻对路面损伤的要求。

By setting up a two-degree-of-freedom vehicle model,this paper analyzes the effect of vehicle speed and roadway surface condition on the random dynamic loads of the wheels. The effect of the random dynamic loads of the wheels on the fatigue stress of the roadway is also analyzed. The analytic result shows that the different vehicle speed and roadway surface condition cause different changes in the dynamic response and fatigue damage of the roadway.It is put forward that the demand of reducing the random dynamic loads of the wheels can be met by properly considering the relation between vehicle speed and roadway surface condition,so that the damage of the roadway can be decreased.