Synchronization Mechanism of Dual-body Dynamic Vibration Absorption System with Mutiple-rotor and Double-frequency Actuation
Aiming at the problems of low screening efficiency and poor vibration isolation performance of single-body vibration system with same frequency actuation,a dual-body vibration absorption system with multiple-motor and double-frequency actuation is designed.To explore the dynamic characteristics of the vibrating system,the vibration isolation performance and the synchronization mechanism are studied.Firstly,the dynamic model of the system with multiple degrees of freedom is established by Lagrangian method.And the steady-state solutions of the screen box are calculated by transfer function method.Secondly,the necessary conditions for the system to implement the stable double-frequency synchronization are determined by using the improved small parameter method and Lyapunov criterion.Then,the effect of the system parameters such as excitation frequency,rotor mass ratio and motor position on synchronization state,synchronization stability and vibration isolation capability is discussed.Finally,an experimental prototype is designed to verify the correctness of the theory model,numerical analysis method and simulation results.The research found that the synchronization is significantly affected by the rotor mass and the position of motor installation.The farther the distance of motor position,the stronger the synchronization.Besides,the excitation frequency of the low frequency motor is closer to the natural frequency of the oscillating body,the better vibration isolation effect.
NETL
NSTL
万方数据
