论文部分内容阅读
目的探讨利用数字化技术重建交通伤的致伤方式并研究碰撞生物力学响应的可行性,为道路交通事故损伤鉴定提供科学依据。方法基于一起真实的道路交通事故,运用多体动力学、有限元方法(finite element,FE)及传统的检验方法进行致伤方式的分析。根据车辆痕迹检验结果和法医学尸体检验确定人-车发生碰撞接触的位置及具体的损伤。在此基础上,利用PC-CRASH 软件并引入MADYMO 模型进行事故现场重建。根据CT 图像和人体损伤收集头部和腿部碰撞部位的响应数据,建立有限元碰撞模型。根据Mises应力计算碰撞部位的生物力学响应数据,如位移、应变、应力分布等。结果事故现场重建结果显示采用生物力学方法得到的头部和腿部的损伤与尸体检验结果一致,说明运用有限元方法与经典的损伤检验所得结果一致。结论利用数字化技术重建交通伤损伤能够较为真实地反映事故的发生、发展过程及人体碰撞损伤部位的应力、应变情况,解决道路交通事故鉴定中的难点问题。
Objective To explore the ways of using digital technology to reconstruct the injury pattern of traffic injuries and to study the feasibility of collision biomechanics response to provide a scientific basis for the identification of road traffic injuries. Methods Based on a real road traffic accident, a multi-body dynamics, finite element (FE) and traditional test methods were used to analyze the injury patterns. According to the vehicle mark test results and forensic carcasses to determine the location of human-car collision contact and specific damage. On this basis, PC-CRASH software and MADYMO model are introduced to reconstruct the scene of the accident. Based on the CT images and the human body injuries, the collision data of the head and the leg were collected to establish the finite element collision model. Calculate the biomechanical response data of collisions according to Mises stress, such as displacement, strain and stress distribution. Results The reconstruction of the scene of the accident showed that the head and leg injuries obtained by the biomechanical method were consistent with the results of the carcass inspection, indicating that the results obtained by the finite element method were in good agreement with those obtained by the classical injury test. Conclusion Reconstruction of traffic injuries using digital technology can more accurately reflect the occurrence and development of accidents and the stress and strain at the damaged parts of the human body and solve the difficulties in the identification of traffic accidents.