具有分区域梯度硬度结构的定制减压鞋垫
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1.复旦大学工程与应用技术研究院;2.复旦大学附属华山医院足踝外科

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Custom functional insole with personalized cushioning structure
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    摘要:

    目的 针对高弓足等有足底减压需求的人群,设计一种分区域梯度硬度的定制化鞋垫。这类鞋垫经过设计,不再仅依靠使鞋垫上表面几何形状贴合足底,来满足减压需求。方法 本研究设计了一种功能梯度结构,应用于定制化鞋垫,使足垫的不同区域具有梯度变换趋势的硬度特征。通过力学试验,研究了结构单元参数和模量之间的关系。采集了志愿者的足部几何形状和足底压力分布数据,根据压力等高线对足底区域进行划分,以此组装结构单元。本研究设计了4种定制化鞋垫:普通平板鞋垫、优化平板鞋垫、普通全接触鞋垫、优化全接触鞋垫。通过FDM打印,再进行足底压力测试实验,验证分区域的优化设计。结果 所设计的鞋垫可使高弓足测试者静态站立状态下足部峰值压力降低52.8%,步态条件下峰值压力随时间积分的值降低了18.43%。结论 该方法可用于设计定制鞋垫,如针对糖尿病足、高弓足的功能鞋垫,提供更好的减压功能。为临床上保守治疗有减压需求的足部疾病提供参考。

    Abstract:

    Objective A customized insole with gradient hardness is designed for people with high arch foot and other people who need decompression. When designing insole models, we are no longer only focused on the upper surface geometry. Methods In this study, a functional gradient structure was designed, which was applied to the customized insole. Porous elements with corresponding Young's modulus are used in different areas of insole The relationship between structural element parameters and modulus is studied through mechanical tests. The foot geometry and plantar pressure distribution data of volunteers were collected, and the plantar region was divided according to the pressure contour line to assemble the structural unit. Four kinds of customized insoles were designed: ordinary flat insole, optimized flat insole, ordinary full contact insole and optimized full contact insole. Through the plantar pressure test experiment, the optimization design of sub region was verified. Results The results show that the designed insole can reduce the peak pressure of high arch foot by 52.8% in static standing state and 18.43% in gait condition. Conclusions This method can be used to design customized insoles, such as functional insoles for diabetes and high arch feet, providing better decompression function. Objective to provide a reference for conservative treatment of foot diseases with decompression needs.

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  • 收稿日期:2020-09-18
  • 最后修改日期:2020-11-02
  • 录用日期:2020-11-03
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