电动吻合器柔性转弯结构的设计与实验研究
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金重点项目(51735003),上海市科委项目(18441900200)


Design and Experimental Study on Flexible Articulation of Electric Stapler
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    目的 设计一种应用于电动吻合器的切口式柔性转弯结构,并研究其转弯性能。方法 对切口式柔性转弯结构进行设计与建模;建立转弯结构的运动学和静力学模型,并进行仿真计算;采用有限元仿真方法 研究3组结构在对称切口等刚度和变刚度下的应力、偏转角度、顶部位移及驱动力;搭建转弯结构性能测试实验平台,对仿真结果 和模型进行验证。结果 弯曲过程中,转弯结构理论模型与实验结果基本吻合;随着对称切口刚度的优化,变刚度转弯结构的最大应力分别下降20.64%和39.20%;变刚度结构弯曲时所需拉力最小,相较于等刚度结构下降33.41%,且顶端沿弯曲平面的位移(30.8 mm)最小;3组转弯结构最大偏转角度均可达到90°。结论 转弯结构运动学和静力学模型可用于其拉力和位置变化的计算;采用对称切口变刚度的结构转弯性能优于等刚度结构;切口式柔性转弯结构符合设计要求,满足电动吻合器的转弯需求。

    Abstract:

    Objective To design a notched flexible articulation applied to electric stapler and study its turning performance. Methods The notched flexible articulation was designed and modeled. The kinematics and statics models of the articulation were established for simulation calculations. The stress, deflection angle, top displacement and driving force of the articulation with 3 different turning structures were studied under equal and variable stiffness of symmetrical notches by using finite element simulation. An experimental platform for performance test of the turning structure was built to verify the simulation results and the model. Results The theoretical model of the turning structure in bending process was basically consistent with the experimental results. With the optimization of symmetrical notch stiffness, the maximum stress of the articulation with variable stiffness was reduced by 20.64% and 39.20%, respectively. The articulation with variable stiffness required the smallest tensile force during bending, which was 33.41% lower than that of the articulation with equal stiffness, and the tip displacement (30.8 mm) along the bending plane was the smallest. The maximum deflection angle for the articulation with 3 different turning structures all could reach 90°. Conclusions The kinematics and statics models of the articulation can be used for the calculation of its tensile force and position changes. The turning performance of the articulation with variable stiffness using symmetrical notch is better than that with equal stiffness. The notched flexible articulation meets the design requirements and the turning needs of electric stapler.

    参考文献
    相似文献
    引证文献
引用本文

潘贞,艾辽元,王皓辰,刘晨旭,葛文明,宋成利.电动吻合器柔性转弯结构的设计与实验研究[J].医用生物力学,2021,36(6):883-889

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2020-09-01
  • 最后修改日期:2020-10-23
  • 录用日期:
  • 在线发布日期: 2021-12-23
  • 出版日期:
关闭