6岁行人侧撞腹部损伤有限元模型分析

Q4 Engineering
Wenle Lv, J. Ruan, Haiyan Li, Shihai Cui, Lijuan He, Shijie Ruan
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引用次数: 4

摘要

先前开发的6岁行人腹部有限元(FE)模型用于分析侧面碰撞试验中的内脏损伤,并结合缩放方法。将该模型应用于成人腹部尸体横向碰撞实验中,通过将模拟结果与按比例缩放的实验响应走廊进行对比,验证模型的生物保真度。仿真结果表明,在不同的冲击速度下,腹部力-变形曲线与实验走廊的比例曲线吻合较好。腹部冲击力、变形和粘性判据(VC)的最大值与冲击速度成正比。在压缩和粘性标准方面,在6.7 m/s和9.4 m/s的冲击速度下,儿童腹部发生AIS4+(简略损伤量表)腹部损伤的概率为25%。从第一主应变判断,在6.7 m/s和9.4 m/s的模拟中出现左肾、胃和脾脏的挫伤或破裂,而仅在9.4 m/s的模拟中出现肝脏破裂。预测的内脏损伤在力、变形和VC基础损伤标准中是一致的。腹部最大冲击力与冲击角度成反比,腹部变形与冲击角度成反比。因此,该模型可以进一步应用于分析6岁儿童在行人撞击下的腹部损伤。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Abdominal injury analysis of a 6-year-old pedestrian finite element model in lateral impact
A previously developed finite element (FE) model of a 6-year-old pedestrian abdomen was used to analyse internal organs injuries in lateral impact tests in conjunction with scaling methods. The model was applied to reconstruct adult abdominal cadaver experiments in lateral impact to verify its biofidelity by comparing simulation results with scaled experimental response corridors. Simulation results showed that the abdominal force-deformation curves were well matched with the scaled experimental corridors in different impact speeds. The maximum values of abdominal impact force, deformation and viscous criterion (VC) were proportional to impact velocity. In terms of compression and viscous criterion, the paediatric abdomen had a 25% probability risk of AIS4+ (Abbreviated Injury Scale) abdominal injury in impact velocities of 6.7 m/s and 9.4 m/s. Judging by the first principal strain, contusion or rupture of the left kidney, stomach and spleen appeared in simulations of 6.7 m/s and 9.4 m/s, while liver rupture appeared only in simulations of 9.4 m/s. Predicted internal organ injuries were found to be consistent among the force, deformation, and VC basis injury criteria. The maximum abdominal impact force was inversely proportional to the impact angle, while the abdominal deformation was proportional to the impact angle. Therefore, the model can be further applied to analyse abdominal injuries for a 6-year-old human in pedestrian impact.
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来源期刊
International Journal of Vehicle Safety
International Journal of Vehicle Safety Engineering-Automotive Engineering
CiteScore
0.30
自引率
0.00%
发文量
0
期刊介绍: The IJVS aims to provide a refereed and authoritative source of information in the field of vehicle safety design, research, and development. It serves applied scientists, engineers, policy makers and safety advocates with a platform to develop, promote, and coordinate the science, technology and practice of vehicle safety. IJVS also seeks to establish channels of communication between industry and academy, industry and government in the field of vehicle safety. IJVS is published quarterly. It covers the subjects of passive and active safety in road traffic as well as traffic related public health issues, from impact biomechanics to vehicle crashworthiness, and from crash avoidance to intelligent highway systems.
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