量化活跃肌肉重定位有限元部模型在曲中的重要性,使用动力学,动力学和组织级反应
Prasannaah Hadagali1, Steven L Fischer2, Jack P Callaghan2
1Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada.
Annals of biomedical engineering
|November 4, 2023
概括
将有限元部模型与活跃的肌肉重新定位,可以提高模拟撞击场景的准确性. 这种基于肌肉的方法比传统的边界条件更好地反映了体内反应,增强了受伤风险分析.
科学领域:
- 生物力学 生物力学
- 计算建模 计算建模
- 伤害生物力学 伤害生物力学
背景情况:
- 非中性部位置是撞击事件中的关键初始条件,通常与受伤率的增加有关.
- 当前的有限元素 (FE) 部模型通常使用应用边界条件 (BC) 来重新定位,这可能无法完全复制体内肌肉活动.
- 在体内,部肌肉积极收缩以达到和保持头部和部姿势,产生内在负荷.
研究的目的:
- 在当代FE部模型中,将基于肌肉的新型重新定位方法与传统的应用边界条件 (BCs) 进行比较.
- 为了评估这些不同的重新定位方法对前方头部曲30°的影响.
- 评估动力学和组织水平反应的准确性.
主要方法:
- 一个有限元部模型被用于前进的头部曲模拟.
- 边界条件 (BC) 方法涉及向头部施加外部矩 (2.6 Nm),使第一个胸椎 (T1) 固定.
- 基于肌肉的方法模拟了在重力负荷下部曲肌肉和延伸肌肉的共同收缩,以达到目标30°的曲.
主要成果:
- 肌肉收缩方法在体内实验数据的10%内产生了动力学反应,超过了BC方法 (18%的差异).
- 使用肌肉收缩 (167 N 压缩,12 N 剪切) 计算的椎间盘间力量与文献值一致,与预测力不足的BC方法不同.
- 与BC方法相比,肌肉收缩导致所有水平的annulus纤维菌株平均增加60%.
结论:
- 与传统的BC相比,肌肉重新定位方法在FE部模型中显著提高了动力反应和组织水平的结果.
- 积极的肌肉重新定位提供了更准确的模拟体内部动力学和动力学.
- 这些发现强调了将活跃的肌肉功能纳入非中性位置的现实FE部模型模拟的重要性.
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