Transverse vibration analysis of two maglev trains passing by in open air

Using the 3-D compressible N-S equations and dynamic mesh, the train passing pressure pulse of Shanghai maglev train at the relative speed of 860 km/h was analyzed in order to know the aerodynamic force's influence on the stability of maglev train. A detailed dynamic model was established, where the carbody was considered as elastic body while the suspension system was considered as spring-damp element. The transverse vibration considering the train passing pressure pulse was calculated. The results show that the difference of the maximal pressure pulse between numerical calculation and real car test is less than 6%, and the transverse vibration only arosed by the irregularity of rail track is little. It is great if the influence of train passing pressure pulse is considered, and the underframe's maximal transverse acceleration is 1.5 m/s². The suspension bogies' acceleration reduce to 0.7 m/s² under secondary suspensions' buffer action.