基于有限元模型分析不同蹬冰角度足踝部应力分布差异
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1.北京体育大学;2.华中科技大学船舶与海洋工程学院

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Differences in Stress Distribution Analysis of Foot and Ankle At Different Push-off Angles Based on Finite Element Model
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    摘要:

    目的:模拟仿真不同蹬冰角度足踝部的应力,通过优化分析得到合理的蹬冰角度与足踝部应力的定量关系。方法:建立冰球鞋-足踝耦合有限元模型,使用三维拍摄获取冰球运动员的运动学参数进行模型验证与约束,计算对比分析不同角度蹬冰动作的足踝部应力数据,构建多目标优化函数模型。结果:在相同蹬冰角度下,胫腓骨应力最大,距下关节应力次之,第一跖趾关节应力较小,足底筋膜应力最小。随着蹬冰角度的减小,足踝部应力单调递增,胫腓骨和足底筋膜应力变化幅度大,距下关节和第一跖趾关节应力变化幅度较小。结论:在冰球运动启动阶段蹬冰过程中,蹬冰角度与足踝不同部位应力呈反比例关系。最佳蹬冰角度取决于对滑冰速度的期待值,如果给定速度与应力承受之间的偏好系数,可通过优化方法计算出最优蹬冰角度。

    Abstract:

    Objective:The study aims to simulate different ice angles of skating, and obtain a reasonable angle of push-off through optimization analysis. Methods: A finite element model was established, then the kinematic parameters of ice hockey players were obtained by 3D photography, which were inputted as the boundary condition of the model for validation and simulation. The stress and strain was obtained for analyzing,, then construct the multi-objective optimization function model.. Results: Under the same push-off angle, the stress value of the tibia and fibula is the largest, followed the subtalar joint stress value, then the first metatarsophalangeal joint stress, and finally the plantar fascia stress value is the smallest. As the angle of push-off increases, the stress of foot and ankle decreases monotonously, the stress of tibia fibula and plantar fascia changes greatly, and the stress of subtalar joint and first metatarsophalangeal joint changes less. Conclusions: At push-off phase, the smaller push-off angle , the greater stress of the ankle. The optimal push-off angle depends on the expected value of skating speed. If the preference coefficient between speed and stress tolerance is given, the optimal push-off angle can be calculated by optimization method.

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  • 收稿日期:2021-11-12
  • 最后修改日期:2022-01-06
  • 录用日期:2022-01-07
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