Dynamic Analysis of Maglev Train and Switch Beam Coupled System

Two kinds of finite element model of the switch beam for high-speed maglev train are established, one uses the beam element and the other uses the plate element. Then vibration modes and natural frequencies are presented in this paper. It is found that there are abundant torsional modes within the 14 similar to 16Hz frequency range, which can explain why a 15Hz frequency vibration is easy to occur for the switch beam on Shanghai Maglev Line. Finally, dynamic responses of the switch beam are calculated. Numerical results show that the maximum vertical displacement appears at the 3rd mid-span, which is about 1. 33mm. Response curves of the 1st mid-span and 5th mid-span are similar due to the symmetric structure in the longitudinal direction, as well as the 2nd mid-span and 4th mid-span. The geometric irregularities of the guideway have distinctly influence on acceleration response of the switch beam.