Li Guibing, Tan Zheng, Lv Xiaojiang, Ren Lihai
School of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China.
State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China.
Appl Bionics Biomech. 2019 Jul 24;2019:4930803. doi: 10.1155/2019/4930803. eCollection 2019.
Head injuries are often fatal or of sufficient severity to pedestrians in vehicle crashes. Finite element (FE) simulation provides an effective approach to understand pedestrian head injury mechanisms in vehicle crashes. However, studies of pedestrian head safety considering full human body response and a broad range of impact scenarios are still scarce due to the long computing time of the current FE human body models in expensive simulations. Therefore, the purpose of this study is to develop and validate a computationally efficient FE pedestrian model for future studies of pedestrian head safety. Firstly, a FE pedestrian model with a relatively small number of elements (432,694 elements) was developed in the current study. This pedestrian model was then validated at both segment and full body levels against cadaver test data. The simulation results suggest that the responses of the knee, pelvis, thorax, and shoulder in the pedestrian model are generally within the boundaries of cadaver test corridors under lateral impact loading. The upper body (head, T1, and T8) trajectories show good agreements with the cadaver data in vehicle-to-pedestrian impact configuration. Overall, the FE pedestrian model developed in the current study could be useful as a valuable tool for a pedestrian head safety study.
头部受伤在车辆碰撞事故中对行人来说往往是致命的或具有足够的严重性。有限元（FE）模拟为理解车辆碰撞事故中行人头部受伤机制提供了一种有效方法。然而，由于当前有限元人体模型在昂贵模拟中的计算时间长，考虑完整人体响应和广泛碰撞场景的行人头部安全研究仍然很少。因此，本研究的目的是开发并验证一种计算效率高的有限元行人模型，用于未来行人头部安全研究。首先，在本研究中开发了一个具有相对较少单元数量（432,694个单元）的有限元行人模型。然后，该行人模型在节段和全身水平上针对尸体测试数据进行了验证。模拟结果表明，在侧向撞击载荷下，行人模型中膝盖、骨盆、胸部和肩部的响应通常在尸体测试通道范围内。上半身（头部、T1和T8）轨迹在车辆与行人碰撞配置中与尸体数据显示出良好的一致性。总体而言，本研究中开发的有限元行人模型可作为行人头部安全研究的有价值工具。
