Lumbar Spine Response of Computational Finite Element Models in Multidirectional Spaceflight Landing Conditions.
Lumbar Spine Response of Computational Finite Element Models in Multidirectional Spaceflight Landing Conditions.
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多向航天着陆条件下计算有限元模型的腰椎响应。
DOI：
10.1115/1.4045401
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Weaver,AshleyA
中科院分区：
文献类型：
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作者：
Ye,Xin;Jones,DerekA;Gaewsky,JamesP;Koya,Bharath;McNamara,KyleP;Saffarzadeh,Mona;Putnam,JacobB;Somers,JeffreyT;Gayzik,FScott;Stitzel,JoelD;Weaver,AshleyA
本研究的目标是比较混合III、人类乘员约束测试设备(TOR)和全球人体模型联盟简化50th百分位(GHBMC M50-OS)有限元模型之间的腰椎响应差异，并评估在航天着陆条件下腰椎损伤指标对多方向加速度脉冲的敏感性。混合动力III、雷神和GHBMC车型在通用座椅内以基线姿势放置，配有侧护罩和五点约束系统。参数研究采用拉丁超立方体实验设计，包括13个边界条件，分为载荷条件变量和环境变量。这三个模型中的每一个都进行了455次模拟，总共进行了1365次模拟。混合机型III和雷神表现出类似的腰椎压缩力。与GHBMC(1.3 ± 0.9 kN)相比，混合型III的平均腰椎压缩力(2.2 ± 1.5 kN)高45%，而TOR型(2.0 ± 1.6 kN)高51%。与混合III相比，雷神的腰椎屈曲力矩平均增加了%，腰椎伸展力矩平均增加了436%。与混合型III和雷神相比，GHBMC模型的弯矩要低得多。回归分析显示，在所有模型中，腰椎对负荷条件变量的反应比环境变量更敏感。这项研究量化了混合III、TOR和GHBMC之间模型间腰椎反应的差异和敏感性。结果提高了对航天着陆腰椎反应的认识。
The goals of this study are to compare the lumbar spine response variance between the hybrid III, test device for human occupant restraint (THOR), and global human body models consortium simplified 50th percentile (GHBMC M50-OS) finite element models and evaluate the sensitivity of lumbar spine injury metrics to multidirectional acceleration pulses for spaceflight landing conditions. The hybrid III, THOR, and GHBMC models were positioned in a baseline posture within a generic seat with side guards and a five-point restraint system. Thirteen boundary conditions, which were categorized as loading condition variables and environmental variables, were included in the parametric study using a Latin hypercube design of experiments. Each of the three models underwent 455 simulations for a total of 1365 simulations. The hybrid III and THOR models exhibited similar lumbar compression forces. The average lumbar compression force was 45% higher for hybrid III (2.2 ± 1.5 kN) and 51% higher for THOR (2.0 ± 1.6 kN) compared to GHBMC (1.3 ± 0.9 kN). Compared to hybrid III, THOR sustained an average 64% higher lumbar flexion moment and an average 436% higher lumbar extension moment. The GHBMC model sustained much lower bending moments compared to hybrid III and THOR. Regressions revealed that lumbar spine responses were more sensitive to loading condition variables than environmental variables across all models. This study quantified the intermodel lumbar spine response variations and sensitivity between hybrid III, THOR, and GHBMC. Results improve the understanding of lumbar spine response in spaceflight landings.