基于载重率的中重型载货汽车纵向附着性能研究

Research on Longitudinal Adhesive Performance of Medium and Heavy Trucks Based on Load Rate

针对交通事故中计算不同速度、类型,以及装载量的中重型载货汽车纵向附着系数无可靠参考标准的问题,选取三种初速度、三种类型以及七种不同装载量载货汽车进行现场制动性能测试,分析样本中数据关系,结合纵向附着系数与垂直载荷关系的理论分析,提出了在求解中重型载重货车附着系数时应用载重率的概念,建立了中重型载货汽车的载重率与纵向附着系数的回归关系模型并对残差进行了检验.采用此模型对中重型载货汽车在其他载重率条件下的纵向附着系数进行了预测.

Aiming at the problem that there is no reliable reference standard for calculating the longitudinal adhesion coefficient of medium and heavy trucks with different speeds,types and loads in traffic accidents,three initial speeds,three types and seven trucks with different loads were selected to carry out on-site braking performance tests.Based on the analysis of the data relationship in the samples and the theoretical analysis of the relationship between the longitudinal adhesion coefficient and the vertical load,the concept of load rate was proposed for solving the adhesion coefficient of medium and heavy truck.The regression model between load rate and longitudinal adhesion coefficient of medium and heavy truck was established and the residual error was tested.Finally,the proposed model was used to predict the longitudinal adhesion coefficient of medium and heavy trucks under other load rates.