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全身有限元计算模型的建模和模拟可信度评估,用于NASA的外载活动应用程序

Richard A Perkins¹, Christopher A Gallo², Athena E Ivanoff¹

¹Universities Space Research Association, Glenn Research Center, Cleveland, OH, USA.

Computer methods in biomechanics and biomedical engineering

|December 22, 2023

概括

有限元 (FE) 模型评估宇航员受伤风险,但它们在改变重力的可信度是有限的. 这项研究发现FE模型在特定条件下是可信的,并建议对空间应用进行改进.

科学领域:

生物机械工程生物机械工程
计算建模计算建模
太空飞行生理学太空飞行生理学

背景情况:

有限元 (FE) 模型对于评估宇航员受伤风险至关重要.
目前对 FE 模型在改变重力的验证,验证和可信性 (VV&C) 程序是不够的.
通常使用的是THUMS和Elemance全身FE模型,但对于太空应用需要严格的VV&C.

研究的目的:

进行THUMS和Elemance FE模型的VV&C评估,以预测宇航员受伤生物力学在改变的重力条件下.
通过使用NASA-STD-7009A.中概述的八个因素来评估这些FE模型的可信性.
确定局限性,并提出提高FE模型可信度的策略,以NASA为中心的应用.

主要方法:

评估FE模型 (THUMS,Elemance) 使用每个NASA-STD-7009A.A的八个可信度因素.
根据现有的VV&C文档,为可信度因素分配顺序分数.
使用主题专家输入确定可信度充足度值.

主要成果:

FE模型在类似于高速公路和接触体育赛事的动力学和动力学范围内预测宇航员受伤生物力学方面表现出了可信度.
这些模型在这些特定范围之外应用时被发现有缺陷.
可信度得分表明模拟改变重力环境的独特条件的局限性.

结论:

THUMS 和 Elemance FE 模型在改变重力的情况下模拟宇航员受伤的可信度有限.
改进是必要的,以提高模型对太空飞行场景的预测能力.
该研究建议采取具体策略,提高FE模型在NASA伤害风险评估领域的可信度.

关键词:

一个有限的元素.可信度评估评估的可信度评估车外活动车外活动整个身体的计算模型.

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