多信息融合的交通事故数值再现方法

综合利用轨迹优化、有限元理论及多刚体方法对某起典型三车碰撞事故案例进行数值再现.以车辆停止位置为目标函数,车身接触位置为约束条件模拟计算出事故发生过程.利用多刚体动力学方法计算出车内乘员头部加速度,以此进行人体损伤分析.利用有限元方法模拟车辆撞击护栏的过程,通过护栏变形数值模拟结果与真实事故中的变形量相比较,验证车辆撞击速度的可靠性.通过案例分析认为综合利用事故中遗留下的刹车印迹、车身或其他物体变形、人体损伤等多种信息,可以对碰撞事故进行精确分析,同时各信息之间可以相互制约和验证,从而为事故鉴定提供理论依据和数值参考.

The Traffic Accident Reconstruction Based on Multi-information Fusion

The simulation was finished in one typical traffic accident case including three cars and guardrails based on the theory of trajectories optimization,multi-body dynamics method and finite element method.Based on the information of the rest position of the vehicles,their velocity and the state could be reconstructed at the moment of contacting.The acceleration on the head of the passenger could be calculated by the multi-body dynamics method.According to the result,the injury of the human could be analyzed.Based on finite element method,the course of the vehicle crash to the guardrail could be simulated.The deformation of the guardrail of the simulation result could be validated by the data in the real accident.Thus,the velocity of the vehicle could be verified.It was proved to be effective on traffic accident reconstruction with the help of the different information.On the other hand,the relationship of the information was restricted and related.All of the information could provide a scientific foundation for accident judgments.