Based on the theory of vehicle track coupling dynamics, the local vibration of the high-speed railway box
girder is analyzed by the Finite Element Method and the model is simulated with the solid elements. Through the study of
vibration characteristics of the selected 6 sensitive points, the local vibrations in different parts of the box girder are
figured out. It is compared the response of the time domain and frequency domain in different parts of the cross section on
different train speeds. Furthermore, the influence of track irregularity of local vibration response is analyzed. The results
show that the track irregularity is the main factor causing local vibration. At last, the effects of local vibration on the
boundary conditions are discussed. The response of top panel, floor panel and web panel were different and the flange
panel was similar between the simple supported beam and the fixed beam.