椎脊柱在喷射过程中的动力反应的有限元分析,使用山型动态肌肉模型
Yikang Gong1,2, Zhenghan Cheng1,2, Ee-Chon Teo1,2
1Faculty of Sports Science, Ningbo University, Ningbo 315211, China.
Bioengineering (Basel, Switzerland)
|July 27, 2024
概括
在模拟的紧急喷射过程中,有意识地收缩部肌肉,可显著降低飞行员椎脊柱的旋转变异性,但上部部分除外. 这种活跃的肌肉参与对于预防飞行员部受伤至关重要.
科学领域:
- 生物力学 生物力学
- 预防脊柱损伤 预防脊柱损伤
- 航空航天医学 航空航天医学
背景情况:
- 飞行员喷射座椅涉及高加速度,可能导致部受伤.
- 了解活跃的部肌肉在缓解这些损伤中的作用至关重要.
- 以前的研究经常将部肌肉模型为被动或省略它们.
研究的目的:
- 研究在模拟紧急喷射过程中,活动部肌肉参与对椎脊柱动态的影响.
- 为了比较椎脊柱段的旋转反应与活跃,被动和没有肌肉的模型.
- 确定影响受伤风险的关键肌肉动态.
主要方法:
- 一个详细的3D有限元素 (FE) 模型的椎脊柱 (C0-T1) 已开发,结合13个主要的部肌肉.
- 使用希尔型模型模拟活跃肌肉力量,考虑肌肉状态,速度和长度.
- 模拟的喷射加速度概况 (125 G·s−1,峰值 10 G) 被应用到模型中.
主要成果:
- 与被动或没有肌肉模型相比,活跃肌肉在上部段 (C0-C2) 增加了曲运动.
- 椎脊柱段显示了类似的S-和C-曲率趋势,峰值屈曲约为95-105 ms.
- 活跃的肌肉活动通常会减少跨段的旋转角度变化,除了60-120 ms之间的C0-C2外.
结论:
- 活跃的肌肉动力学对于在弹射过程中确定肌肉力大小至关重要.
- 飞行员在喷射前进行有意识的肌肉收缩对于降低椎损伤风险至关重要.
- 这些发现强调了在生物动力学模拟中包括活体肌肉特性对于飞行员安全的重要性.
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