Abstract
A Limitation of amplitude of ground vibration for running safety of railway vehicle on a track being oscillated by earthquake is numerically analyzed using a 3 dimensional vehicle mechanical model having vertical wheel flanges. As the results, it is clarified that the conventional estimation of running safety by 2 dimensional simple plane mechanical model have to be improved, and that the limitation of amplitude of the track will be defined by the rocking motion in case of low frequency as 0.9Hz, but that will be defined by the lateral load of wheel in case of rather high frequency as 1.8Hz. Some trial calculations for running safety of vehicle on structure for real, earthquake are shown.
