Abstract
During the operation of magnetic liquid double suspension bearing(MLDSB),due to rotor res-onance,assembly error and other factor,the vibration amplitude of the rotor in resonance state ex-ceeds the original design clearance,resulting in the collision damage between the rotor and the sta-tor,the rotor and the casing.This paper presents a method to simulate the influence of different fac-tors on the dynamic characteristics of 5 degrees of freedom(DOF)rotor based on the dynamic model of MLDSB.Firstly,according to the second Lagrange equation,the dynamic equation of 5 DOF ro-tor is derived,and the mathematical model is established.Then,based on 5 DOF rotor dynamic equation,the rotor transient dynamic equation under collision state is obtained,and the rotor transi-ent collision dynamic simulation model is established.Finally,the key influencing factors of rotor dynamic characteristics are extracted,and the influence mapping relationship of rotor displacement,axis locus and stress distribution under different factors is simulated by using ANSYS Workbench software.The experimental results show that this method can effectively reflect the influence of vari-ous factors on the dynamic characteristics of the rotor.This method can provide theoretical reference for the design and control of MLDSB.
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