Method for Estimating Lateral Carbody Vibration Acceleration used for Safety Evaluation of Railway Vehicles against Crosswind

The critical wind speed for overturning is often evaluated using the "RTRI detailed equation." In the equation, the lateral carbody vibration inertia force is considered to be the exerted force affecting overturning, and the lateral vibration acceleration is assumed from previous running test results. This paper shows that the critical wind speed for overturning can be accurately calculated using simulation results of the lateral vibration acceleration occurring at the center of gravity of a car body under strong crosswinds. In addition, a new method is proposed to estimate the lateral vibration acceleration using track alignment irregularity data.