摘要
行人下肢的损伤重建分析在交通事故成因鉴定中起重要作用。为进一步明确轿车-行人交通事故中下肢损伤的成因机制及动力学响应,利用THUMS4.0人体有限元模型对轿车-行人碰撞中的下肢损伤进行重建。首先选取一例行人损伤的轿车-行人碰撞真实案例,并通过EDR技术得到轿车事发时的碰撞速度为40 km/h。再将该碰撞速度作为轿车-行人碰撞仿真的输入参数,采用THUMS4.0人体有限元模型对行人下肢损伤进行重建。仿真结果显示:行人右下肢的胫骨及腓骨的von Mises等效应力分别为198、243 MPa。尸检报告及CT影像片提示:行人与轿车发生碰撞后右下肢胫、腓骨骨折。有限元模拟仿真中行人下肢的动力学响应与行人下肢的实际损伤较为吻合。该方法有利于研究分析行人下肢损伤的成因机制,同时对交通事故司法鉴定有着重要的指导意义。
The analysis of lower extremity injuries reconstruction plays an important role in the causation identification of traffic accidents. To further clarify the injury mechanism and dynamic response of pedestrian lower extremity in traffic accident, the THUMS4.0 human finite element model was used toreconstruct the injuries of pedestrian lower extremity in a car-pedestrian traffic accident. A real case of car-pedestrian collision was applied. Car speed in a car collision was tested as 40 km/h from EDR. After that this speed was applied in the car-pedestrian crash simulation as an input parameter. Then the THUMS4.0 human finite element model was used to rebuild the injuries of lower extremity. The simulation results show that the equivalent stress yon Misses of the right tibia and fibula are 198Mpa and 243Mpa, respectively. The autopsy report and CT images of lower extremity reveal that right tibia and fibula of the pedestrian are fractured. The simulation results of lower limb damage are consistent with the real ones. This tremity injuries, but also hon. approach can not only analyze the genetic mechanism pedestrian lower ex- have important guiding significance of traffic accidents in judicial identifica-
出处
《重庆理工大学学报（自然科学）》
CAS
2015年第2期24-29,共6页
Journal of Chongqing University of Technology：Natural Science
基金
国家自然科学基金资助项目(31200709)
重庆市院士专项基金资助项目(cstc2012jjys0004)
重庆市科委重点实验室专项经费资助项目
关键词
成因鉴定
交通事故
有限元仿真
下肢损伤重建
causation identification
traffic accidents
finite element simulation
lower extremity injuries reconstruction
