动态载荷对小腿截肢患者残端压力的影响

来源 :清华大学学报 | 被引量 : 0次 | 上传用户:lwfpa1
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接受腔/残肢界面压力分布特征是假肢优化设计的基础,传统的有限元模型只限于静态分析,不符合实际情况.该文基于患者行走过程的运动学和动力学特性,建立三维非线性有限元模型,研究动态载荷对界面压力的影响.结果表明: 界面压力主要分布在髌韧带、胫骨内外侧和窝区; 一个平地正常速度行走的步态周期内,残肢界面的最大平均正压力是单腿站立状态下的1.15倍,是双腿站立状态下的 1.73 倍.动态载荷使残肢和接受腔之间的界面压力增大,行走过程的动态影响不能忽略.
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