部边界状况和姿势对部脊柱反应的重要性,使用详细的有限元素人体模型在首冲撞中进行评估
M I Morgan1, M A Corrales1, H Kaur1
1Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, Canada.
Annals of biomedical engineering
|May 15, 2025
概括
使用干替代质量 (TSM) 的头先撞击测试结果比全身 (FB) 模型更高的部力. 部姿势显著影响受伤风险,延伸的姿势会增加力量.
科学领域:
- 生物力学 生物力学
- 伤害生物力学 伤害生物力学
- 计算建模 计算建模
背景情况:
- 首发冲击 (HFI) 构成椎脊柱创伤的重大风险.
- 目前HFI的实验模型包括全身 (FB) 和干替代质量 (TSM) 配置.
- 对HFI的FB和TSM模型之间缺乏直接比较.
研究的目的:
- 用TSM与FB模型计算调查和比较HFI中头部和部反应.
- 分析初始部姿势 (屈曲,中立,伸展) 在HFI期间对头部和部生物力学的影响.
- 为了评估不同冲击速度对头部和部反应的影响.
主要方法:
- 使用有限元分析来建模头部和部反应.
- 在TSM和FB模型中,在2.0,3.1和3.6米/秒的速度下,对刚性表面进行了反向滴落.
- 关键指标包括头部冲击力,头部和部动力学,脊椎动力学和内部能量.
主要成果:
- 与FB模型相比,TSM模型表现出更大的部力和内部能量吸收.
- 在FB模型中,符合标准的胸部减弱了部力和能量,尽管头部冲击力相似.
- 中立和延伸的部姿势导致了更高的部力量由于面部关节的接触,而曲的姿势通过前头转换减少了力量.
结论:
- 与HFI模拟中的FB条件相比,TSM边界条件产生了不同的部反应和更高的部负荷.
- 洛多特式 (中性/延伸) 初始部姿势导致部力量相对于形 (屈曲) 姿势相对增加.
- 了解这些差异对于准确评估HFI场景中的伤害风险至关重要.
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