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运行特定假肢的性能特征通过动态有限元素方法.

Ali Asghar Atai1, Farshad Beiranvand1, Sina Jalili2

  • 1School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran.

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|April 10, 2024
PubMed
概括

特定于跑步的假肢 (RSP) 的刚性和性能随着跑步速度的增加而下降. J曲线的RSP提供了更高的刚性和能量储存,而C曲线的RSP提高了截肢运动员的能源效率和接触时间.

科学领域:

  • 生物力学 生物力学
  • 假肢工程 假肢工程
  • 运动科学 运动科学 运动科学

背景情况:

  • 特定于跑步的假肢 (RSP) 模仿了截肢运动员的生物腿.
  • RSPs对跨肢截肢者的生物力学影响尚未完全理解.

研究的目的:

  • 开发一个有限元模型来评估RSP性能.
  • 分析运行速度和RSP几何学对刚度和能源效率的影响.

主要方法:

  • 创建了一个依赖时间的有限元模型.
  • 该模型包含了与地面接触时的动态负载和角度.
  • 在体内表征考虑了RSP的内在特性和运动员生物力学.

主要成果:

  • 提高运行速度减少了RSP的刚性,垂直地面反应力 (vGRF) 和接触时间.
  • RSP力位移配置文件是非线性的,但在高速时可以线化.
  • 较高的RSP降低了能源效率和vGRF,因为硬度较低.

结论:

  • J曲线的RSP表现出更高的刚性,vGRF和拉伸能量.
  • C 曲线 RSP 导致更长的接触时间和更高的能源效率.

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  • RSP设计显著影响截肢者运行的生物力学和性能.