过盈配合下伺服阀衔铁组件的振动特性研究OA

The internal pre-stress generated by the interference fit connection is studied,focusing on the vibration characteristics of the separable armature component of the electro-hydraulic servo valve under interference fit conditions.Firstly,a dynamic model under pre-stress conditions is established based on the structure model of the separable armature component.A three-dimensional simulation model is created using the finite element analysis method,and modal analysis of the armature component is performed and compared using four different simulation methods.To verify the reliability of the simulation results,the natural frequencies of the separable armature component are determined by applying a sweep frequency signal from an electric actuator to a torque motor,which validated the feasibility of the simulation analysis.Based on this,the impact of the interference fit on the vibration characteristics of the separable armature component is studied.The results show that the interference fit affects the modes of the armature component.As the interference fit increases,the natural frequencies corresponding to the first mode,third mode,and fourth mode decrease with increasing interference fit,but the change is minimal.In contrast,the natural frequency corresponding to the second mode gradually decrease.These research findings provide technical support for the structural optimization design of electro-hydraulic servo valves.