Investigation on vehicle occupant dummy applicability for under-foot impactloading conditions  

作　　者：Teng-Fei Tian Fu-Hao Mo Hao-Yang Su Can Huang Hui Zhao Jun Liu Bo Shang Kui Li Jin-Long Qiu 

机构地区：[1]State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,Hunan University,Changsha,410082,China [2]Institute for Traffic Medicine,Daping Hospital,Army Medical University,Chongqing,400042,China [3]Chongqing Zhongzheng Judicial Expert Center,Chongqing,400020,China [4]NIO Limited Liability Company,Shanghai,200050,China [5]College of Medical Informatics,Chongqing Medical University,Chongqing,400016,China [6]Chongqing Key Laboratory of Traffic Injury and Vehicle Ergonomics,Chongqing,400042,China

出　　处：《Chinese Journal of Traumatology》2024年第4期235-241,共7页中华创伤杂志（英文版）

基　　金：This work is supported by the National Natural Science Foundation of China(Grant No.51875187,32171305);Hunan YouthTalent Program(Grant No.2020RC3016);Natural Science Foundation of Chongqing(Grant No.cstc2021jcyj-msxmX0109);Chongqing Technology Innovation and Application DevelopmentProject(CSTB2023YSZX-JSX0003).

摘　　要：Purpose:Under-foot impact loadings can cause serious lower limb injuries in many activities,such asautomobile collisions and underbody explosions to military vehicles.The present study aims to comparethe biomechanical responses of the mainstream vehicle occupant dummies with the human body lowerlimb model and analyze their robustness and applicability for assessing lower limb injury risk in underfoot impact loading environments.Methods:The Hybrid III model,the test device for human occupant restraint(THOR)model,and a hybridhuman body model with the human active lower limb model were adopted for under-foot impactanalysis regarding different impact velocities and initial lower limb postures.Results:The results show that the 2 dummy models have larger peak tibial axial force and highersensitivity to the impact velocities and initial postures than the human lower limb model.In particular,the Hybrid III dummy model presented extremely larger peak tibial axial forces than the human lowerlimb model.In the case of minimal difference in tibial axial force,Hybrid III's tibial axial force(7.5 KN)isstill 312.5%that of human active lower limb's(2.4 KN).Even with closer peak tibial axial force values,thebiomechanical response curve shapes of the THOR model show significant differences from the humanlower limb model.Conclusion:Based on the present results,the Hybrid III dummy cannot be used to evaluate the lowerlimb injury risk in under-foot loading environments.In contrast,potential improvement in ankle biofidelity and related soft tissues of the THOR dummy can be implemented in the future for betterapplicability.

关 键 词：Lower limb Under-foot impact Human body model DUMMY Finite element model 

分 类 号：R318[医药卫生—生物医学工程]