摘要
交通事故再现分析中碰撞模型的建立和应用是一个关键步骤,目前国内外应用比较广泛的汽车碰撞事故分析软件和方法中模型的建立均应用了动量定理.通过分析机动车碰撞中撞击力大小与形变深度成正比的关系,可以建立起"有效碰撞速度"与汽车形变深度间的关系式,从而通过经验公式来计算出"有效碰撞速度"的大小.当两车发生斜向碰撞时,被撞车辆的运动常常在平动的同时伴有转动.为较准确计算出汽车在碰撞前的速度,通过碰撞过程的动力分析和运动分析,应用动量守恒公式求解碰撞前的车速与汽车碰撞后质心的速度,即可再现碰撞前两车的运动状态.
During the representing analysis for traffic accidents,the establishment and application of collision model are one of the most important steps.The software and method widely applied in domestic and oversea regions in the accident analysis,are established by using the momentum theorem.Through analysing the direct ratio relation between the collision force and the deformation depth in collision,we can construct related format between ＂effective collision speed＂ and deformation depth,accordingly calculate the size of ＂effective collision speed＂ through empirical formula.When two vehicles collide,the twirling phenomenon will occur to the collided one usually along with translational motion.For the purpose of calculating the speed precisely before collision,through the dynamic analysis and motion analysis,the acquirement of the speed that the vehicle runs before collision and the speed that the vehicle runs after collision can be realized.Thus,the state of motion before collision about the two vehicles can be represented clearly.
出处
《辽宁师范大学学报（自然科学版）》
CAS
2011年第1期47-50,共4页
Journal of Liaoning Normal University:Natural Science Edition
关键词
机动车
斜碰撞
动力分析
运动分析
动量守恒
vehicle
inclined collision
dynamic analysis
motion analysis
conservation of momentum
