Study On The Use Of MTMD In Controlling The Vibration Of Bridges Used In Elevated Station Of High-Speed Railway

Firstly, the important significance of vibration control of bridge used in elevated station of high-speed railway was proposed according to its test result and construction status in the paper. The vibration control principle and application of TMD system were introduced and the TMD system was simulated. The dynamical equations of the train-bridge-MTMD interaction system were built based on the relevant assumptions of train, bridge and track irregularity. The all-purpose program for vertical dynamic analysis of train-bridge-MTMD interaction system was developed by using Fortran 90.Next, the 32m prestressed concrete simply supported box beams which were used in Suzhou North Station of Beijing-Shanghai high-speed railway, were analyzed as an example. The influences of different parameters of MTMD system on the vibration damping were discussed and the optimal parameters of MTMD system were determined. The effect of MTMD system on the vibration damping of 32m prestressed concrete simply supported box beam was calculated. The influences of MTMD system on the first natural frequency and the vehicle stability were discussed. The sensitivity of MTMD system effect on the vibration damping was discussed against the variation of loading frequency. The calculation results showed that the effect of MTMD system on the vibration damping of 32m prestressed concrete simply supported box beam subjected to moving vehicle loads were valid.At last, the key parameters materials of the TMD system were chose and designed. The MTMD system which was suitable for the vibration control of bridge used in elevated station of high-speed railway was designed.