Method for determining most unfavorable intersection position of multi-track trains on railway bridge

The invention discloses a method for determining the most unfavorable intersection position of multiple trains on a railway bridge. The method comprises the following steps: S1, carrying out train-bridge coupling analysis on bridge response when a single train passes through the bridge, and obtaining a dynamic line shape of the bridge; s2, performing dynamic linear superposition according to different train line numbers and different intersection positions; s3, carrying out wavelength segmentation on the dynamic line shape of the bridge according to the sensitive wavelength of the vehicle body; s4, evaluating the dynamic line shapes of the bridges inside and outside the sensitive wavelength range of the vehicle body by using a midpoint chord measurement method and a curvature method respectively; and S5, according to the working condition corresponding to the chord measurement value and the curvature value, the most unfavorable intersection position of the multi-track train is obtained. According to the metho