Fig. 2From: The influence of vehicle dynamics on the time-dependent resonances of a bridgeThe bridge (blue marker) and the vehicle (red marker) frequency variation during a vehicle passage for a constant vehicle stiffness (k4, \(k=\) 20.625 MN/m) and nine different vehicle mass values (indicated by the resulting car-bridge frequency ratio). The bridge’s fundamental frequency is displayed as a dashed black line. The light blue area corresponds to the VIDFBack to article page