单边直圆型柔性铰链位移精度的有限元分析

Finite Element Analysis of Displacement Accuracy of Single-notch Right Circular Flexure Hinge

提出了单边直圆型柔性铰链的位移精度系数和偏移率概念,为了分析柔性铰链的结构参数与位移精度系数和偏移率之间的关系,利用ANSYS软件提供的参数化程序设计语言APDL编制程序,实现快速、方便地自动生成柔性铰链的参数化有限元分析模型。分析结果表明:随着最小厚度的增大,位移精度系数减小,而偏移率就增大;切割半径增大,位移精度系数增大,则偏移率减小,而宽度的变化对位移精度系数和偏移率影响很小。

The displacement accuracy coefficient and the offset rate of flexure hinge are put forward in the paper.A fast and easy parametric finite element analytic method based on APDL language in ANSYS is employed to study the relationship between the basic construction parameters of flexure hinge and the two coefficients.The analytic results demonstrate that the displacement accuracy coefficient is reduced as the minimum thickness increases while the offset rate is increased,and that the displacement accuracy coefficient is increased as the cutting radius increases while the offset rate is reduced.It also shows the variation of the width of flexure hinge has little influence on the displacement accuracy coefficient and the offset rate.