Abstract
We investigate running stability of the high-speed-moving vehicle subjected to the various seismic excitation. The analytical model of the vehicle consists of one body, two trucks and four wheelsets, and has a total of 21 degree of freedom. Some springs of vehicles called stoppers are modeled as a nonlinear spring in order to reduce relative displacements. The equations of motion are derived from the Lagrange equation. We use the possibility of the rollover of the vehicle as evaluation index in order to evaluate running stability of the high-speed-moving vehicle. The vehicle is excited by inputting the various seismic waves. We focus on the effect of the maximum acceleration and predominant period of the seismic waves. The maximum acceleration and predominant period of the seismic input are varied. The response behaviors of the vehicle are simulated with the modified seismic input.
