平衡功能障碍康复训练装置的有限元分析

背景：为了对平衡功能障碍患者进行有效的康复训练,课题组自行设计了一款康复训练装置。目的：对自行设计的平衡功能障碍康复训练装置进行强度和刚度分析。方法：利用有限元分析软件ANSYS的工作界面Workbench对康复训练装置进行了强度和刚度分析。分别模拟临床上平衡功能障碍康复训练时的5种不同工作状况,在相同约束条件下分别施加装置自重载荷和患者体质量载荷,得出在不同工况下的应力分布和变形大小。结果与结论：5种工况下,应力集中与变形突出的区域大致相同,其数值与角度成正相关关系且最大等效应力值均小于所用材料的屈服强度,说明该康复训练装置的强度满足设计要求,能够承受所加的负载;从最大应力值和变形来看,该装置的设计趋于保守,可通过结构优化减轻整体装置的质量;对于复杂模型,ANSYS最新工作界面Workbench比Classic界面效率更高。

Finite element analysis on rehabilitation training device for balance dysfunction

BACKGROUND:A rehabilitation training device has been designed by us for the balance dysfunction.OBJECTIVE:To analyze the strength and stiffness of the rehabilitation training device.METHODS:Strength and stiffness analysis was performed using the working interface Workbench of finite element analysis software ANSYS. Five different working conditions were considered. The device's gravity loading and the patient’s weight loading were applied on the finite element model under the same constraints. The stress distribution and deformation were gained for the different working conditions.RESULTS AND CONCLUSION:Under the five kinds of conditions, the area of stress concentration and maximum deformation was roughly same, and the values were positive correlated with angle. The maximum equivalent stress was less than the yield limit of material, which means that the strength of rehabilitation training device could meet the requirement of design. In the sight of the maximum stress and deformation, the device's design tended to be conservative, and the weight of the whole device could be reduced through the structure optimization. For a complicated model, the new working interface Workbench of ANSYS had higher efficiency than the Classic interface.