膜片联轴器非线性应力仿真与试验研究

Simulation and Experimental Study on Nonlinear Stress of Diaphragm Couplings

膜片联轴器具有良好的轴向及角向不对中补偿能力,广泛应用于各类轴系的连接中,其力学性能直接影响轴系运行的安全性和稳定性。基于ANSYS有限元仿真软件,考虑接触非线性及大变形效应,建立膜片联轴器非线性应力仿真模型;分析膜片联轴器在单一扭转、轴向、角向以及径向载荷作用下膜片应力大小及应力分布状况;最后进行了静态扭转及拉伸试验验证。结果表明:膜片应力集中在膜片螺栓孔边、膜片束腰处以及膜片与垫片接触表面边缘附近;在过载或交变载荷作用下,最外层膜片最易发生损伤。

Diaphragm couplings are widely used in various shafting connections due to its good compensation capability in axial and angular misalignment,and their mechanical properties directly affect the safety and stability of shafting operation.Nonlinear stress characteristics simulation model of diaphragm couplings was established based on ANSYS finite element simulation software,considering contact nonlinearity and large deformation effects.The magnitude and distribution of diaphragm stress under single loads in the torsion,axial,angular and radial directions of the diaphragm coupling were analyzed.Finally,static torsion and tensile tests were conducted to verify the accuracy of the simulation model.The results show that the diaphragm stress is concentrated at the edge of the diaphragm bolt hole,the diaphragm waist,and near the edge of the contact surface between the diaphragm and the gasket.The outermost diaphragm is most susceptible to damage under overload or alternating loads.