在带头靠的后端冲击条件下,对头部动力学的有限元分析
Yuan Wang1,2, Hanhui Jiang1,2, Ee Chon Teo1,2
1Faculty of Sports Science, Ningbo University, Ningbo 315211, China.
Bioengineering (Basel, Switzerland)
|September 28, 2023
概括
这项研究使用了3D有限元模型来模拟静态负荷和后端冲击期间的头运动. 优化的头托位置可以防止车祸中的椎脊椎损伤.
科学领域:
- 生物力学 生物力学
- 计算建模计算建模
- 脊椎损伤研究的研究.
背景情况:
- 宫脊椎损伤,特别是鞭伤,在车祸中很常见.
- 了解头复合体的复杂动力学对于预防伤害至关重要.
- 有限元 (FE) 模型为模拟这些动态提供了强大的工具.
研究的目的:
- 开发和验证人类头 (C0-C7) 综合体的3D有限元素模型.
- 分析静态生理负荷下的椎脊柱段运动和动态后端撞击模拟.
- 为了研究撞击加速和头靠子参数对头部动力学的影响.
主要方法:
- 开发一个详细的三维 (3D) 有限元素 (FE) 模型 (C0-C7).
- 应用静态生理负荷 (1.0Nm曲/延伸) 和动态后端冲击脉冲 (4.5G,C7处8.5G).
- 预测的细分运动和头部位移与已公布数据的比较.
主要成果:
- 模型预测与静态生理负载的现有数据保持一致.
- 后端撞击模拟显示了在前200毫秒内明显的动力学反应,受加速和头靠角的影响.
- 峰值延伸旋转根据加速 (G) 和头靠角变化;更高的C7加速增加了下段延伸,但头靠距离是限制因素.
- 从45°调整头靠角到30°,将下段 (C5-C6) 的旋转从延伸到曲,突出了头靠位置的重要性.
结论:
- C0-C7 FE模型有效地模拟了椎脊柱对静态和动态负载条件的反应.
- 冲击期间宫段的快速旋转变化可能超过组织耐受性限制.
- 适当的头托位置和角度对于减轻车辆事故中椎损伤风险至关重要.
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