<b>Numerical Analysis Method for Analyzing Seismic Vehicle Behavior Up to and After Derailment</b>

The authors are conducting research with the aim of establishing a numerical analysis method capable of evaluating vehicle behavior before and after derailment of a train set during an earthquake. In this paper, as a basic study, an analysis method is proposed that can represent seismic vehicle behavior before and after the derailment of a single vehicle in a stationary state. Then, in order to consider the coupling of multiple vehicles, the proposed method is also extended to include dynamic models for connecting members between vehicles such as couplers and inter-car yaw dampers. Furthermore, the influence of the interaction between vehicles on the derailment limit is investigated through trial calculations.