As seen in Figure 14(d), the increasing train speed hasno obvious influence on side force, while for the lift forceand rolling moment, the maximum and minimum peakssignificantly improves, as illustrated in Figure 14(e,f).According to Figure 15(b) and Table 4, the mean aerodynamic loads are not affected by the varying runningspeed. Prior studies (Tian, 2007) showed that the amplitude variation in force induced by the moving train can bestated with a quadratic function of train speed. Based onthis, in this study, the sudden variation of aerodynamicforces is used to analyze the effect of moving train onaerodynamic loads of bridge, as demonstrated in Tables 5