有限元法在医疗器械设计中的应用

Applicationof FEM to the design of medical apparatus

有限元法是机械工程中用来分析结构应力应变的一种数值方法,该方法已经被应用到医疗器械尤其是骨折固定器的设计中。本文以骨折外固定架为例,通过对某型外固定架的抗压、抗弯和抗旋性能的分析,说明在医疗器械的设计阶段,采用有限元法可以使设计者了解其力学特性,发现强度或刚度的薄弱点,从而改进和优化设计。

Finite element method (FEM)is a calculating method for stress and strain analysis in the field of mechanical engineering.FEM has already been used in the design of medical apparatus,especially of the fixer for fracture treatment.The external fixer taken as an example,the anti-compression,anti-blending and anti-torsion characteristics of a certain type of external fixer are analyzed using FEM.This paper shows that by using FEM,the mechanical property of medical apparatus can be revealed at the designing stage.The strength and rigidity weak pocket can be found,and thus the improvement and optimization of medical apparatus can be made.