参数不确定度对汽车侧面碰撞事故再现结果的影响

基于不确定度理论，研究了汽车侧面碰撞交通事故再现分析所需参数的不确定度，包括汽车的载质量、碰撞后质心位移和路面摩擦因数。将测量所得现场几何参数的不确定度视为微小不确定度忽略不计，只考虑路面摩擦因数引进的二阶不确定度及质量参数的影响，针对碰撞前速度的基本算法建立了相应的不确定度分析方法，并给出了应用实例，分析了上述两种参数取值的不确定度对计算结果的影响。

Influence of Parametrical Uncertainties on Traffic Accident Reappearance of Vehicle Side Impact

Based on the uncertainty theory, the uncertainties of necessary parameters for t raffic accident reappearance of vehicle side impact were investigated. These par ameters include cargo mass of vehicle, centroid displacement of vehicle after a collision, and friction coefficient between vehicle and road surface. An analyti cal method for determination of uncertainty was developed according to the corre sponding vehicle speed before collision under the hypotheses of that the measure d uncertainties on the spot were taken as minor ones and omitted; and only the s econd order uncertainties caused by the road friction coefficient and mass param eters were considered. A typical calculation example was also presented in which the effects of uncertainties with two parameters on the calculating results wer e analyzed.