圆弧型柔性铰链应力分析

Stress Analysis of the Circular Arc Flexure Hinge

针对柔性铰链在风洞应变天平校准设备中的应用,将圆弧型柔性铰链作为研究对象,计算其最大应力。通过分析典型柔性铰链的受力情况,提出了将圆弧型柔性铰链等效为直圆型柔性铰链的方法。基于应力集中理论,拟合出了铰链分别受轴向力和弯矩时的应力集中系数计算公式。建立不同参数铰链的三维模型,使用ANSYS Wrokbench软件进行有限元仿真分析,将仿真数据和理论计算数据进行对比,验证等效方法和拟合公式的可行性。

For the application of the flexible hinge in the wind tunnel strain balance calibration system,the circular arc flexure hinges are used as the research object to calculate the maximum stress. The stress of a typical hinge is analyzed and the method which the circular arc flexure hinge is equal to straight round flexure hinge is presented. Based on the stress concentration theory,the stress concentration coefficient formulas of hinge are fitted when the hinge is applied axial force and bending moment respectively. The three dimensional models of different parameters are established,and the finite element simulation analysis is carried out by using ANSYS Wrokbench. The simulation data and theoretical calculation data are compared to verify the feasibility of the equivalent method and the fitting formulas.