Two-Dimensional Planar Railroad Vehicle Model including Wheels with Vertical Flanges for Derailment Behavior Analyses during Earthquake

Abstract

The purpose of this study is to present the derailment behavior of a railway vehicle caused by an earthquake using a two-dimensional planar vehicle model including wheels with vertical flange. Equations of motion for the vehicle are established and calculated after defining wheel load, lateral pressure, etc. When a sinusoidal vibration is given to the track using the simulation, the motion of the vehicle, including the case of derailment, can be reproduced, and the results are generally equivalent to the 3D simulation for the limits of the occurrence of derailment. On the other hand, when the track is given large seismic vibration, no derailment occurs.