Study on Free Vibration Characteristics of Suspension Frame System of Maglev Train
The free vibration characteristics of the suspension system of high temperature superconducting pinned maglev trains will affect the safety and comfort of passengers,thus it is of great importance to study the free vibration of the suspension system.The levitation force data between the high temperature superconductors combination and the permanent magnet guideway is collected by the experimental device,and the empirical formula of the levitation force is obtained.The vertical vibration dynamic model of the suspension system is established based on the empirical formula.The multi-scale method is used to derive the approximate solution of suspension gap response,and the correctness of the approximate solution is verified.Based on the suspension gap approximation solution,the expressions of maximum overshoot and maximum acceleration of the system are derived,and the influence of damping per mass and stiffness per mass of system parameters on maximum overshoot and maximum acceleration is studied.According to the two dynamic indexes of attenuation and comfort of maglev standard,a method to determine the feasible region of system parameters is proposed.The results show that the damping per mass should be less than 19.6 s-1,the stiffness per mass should be less than 139 s-2,and the feasible range of system parameters should be approximately sector-shaped.The aim of this manuscript is to provide the theoretical support for the parameter design of the suspension system.
suspension frame systemlevitation forcemulti-scale methodapproximation solutionfeasible region of system parameters
万方数据
维普
