2013 Volume 69 Issue 2 Pages 211-225
Recently, the phenomena which a ground vibration increases by a track irregularity are reported. It is therefore considered that an influence of track irregularity to the ground vibration may be unable to ignore. We examined about the influence of track irregularity to ground vibration by a numerical simulation. The results of numerical simulation indicate that the maximum and minimum amplitude occur at just before the convex point of the irregular track wave form or at the point if the vibration amplitude at evaluation points changes depending on locus state. The average amplitude increased in proportion to the logarithm of track amplitude irrespective of train speed if the average of the vibration amplitude at the all evaluating points increased. It is considered that the contribution rate of the position synchronous ingredient against the train synchronous ingredient effects the changing vibration amplitude depending on the track state and the increasing of average vibration amplitude.
