镍钛合金胸主动脉支架支撑性能数值模拟研究
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内蒙古工业大学机械学院

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Numerical Simulation Study on Support Performance of NiTi Alloy Thoracic Aortic Stent
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Mechanical Engineering Institute,Inner Mongolia University of Technology

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    摘要:

    目的 对三种支撑体高度(H)、三种支撑体个数(N)和三种截面尺寸(L)的共27款支架进行支撑性能的模拟研究。通过改变支架的几何参数,建立了不同的支架模型,从而分析不同参数对胸主动脉支架支撑性能的影响规律。方法 通过有限元分析法对不同参数的支架模型进行了支撑性能测试的模拟分析。结果 当改变支架的尺寸参数,支架的支撑性能会随着参数的改变而变化。支撑体高度、支撑体个数和截面尺寸对支架支撑性能均有一定的影响。结论 支撑性能影响因素中,影响程度由大到小依次为支撑体高度、截面尺寸、支撑体个数;随着支撑体高度的降低支撑刚度增大;截面尺寸越大支撑刚度越大;随着支撑体个数增多,支撑刚度增大。上述结论为之后胸主动脉支架的开发和研究有一定的指导意义,为临床支架的选择及优化提供了理论依据。

    Abstract:

    objective The support performance of 27 supports with three support heights (H), three support numbers (N) and three cross-sectional dimensions (L) was simulated. By changing the geometric parameters of stents, different stent models were established to analyze the influence of different parameters on the performance of thoracic aortic stents. Methods The finite element analysis method is used to simulate and analyze the bracket performance test of different parameters of the bracket model. Results When the dimension parameters of the bracket are changed, the bracing performance of the bracket will change with the parameters. The support height, the number of supports and the cross-section size all have certain influence on the support performance. Conclusions Among the influencing factors of support performance, the order of influence degree from big to small is support height, section size and number of supports; with the decrease of support height, support stiffness increases; with the increase of cross-section size, support stiffness increases; with the increase of number of supports, support stiffness increases. These conclusions have certain guiding significance for the development and research of thoracic aortic stents, and provide theoretical basis for the selection and optimization of clinical stents.

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历史
  • 收稿日期:2019-04-24
  • 最后修改日期:2019-06-18
  • 录用日期:2019-08-05
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