Characteristics of Weibull Coefficients of Wind Velocity by Wind Directions for Evaluating Safety of Railway Vehicles Under Strong Wind

Abstract

In order to evaluate safety of railway vehicles under strong wind, we calculated Weibull coefficients cd and kd of 10-minute maximum instantaneous wind velocity by 16 wind directions. We used data of the wind velocity and the wind directions that have been obtained at 772 AMeDAS sites in Japan for calculations of cd and kd. In addition we estimated probabilities of wind velocity exceeding the critical wind speed of overturning by using cd and kd, the relative frequency of each wind direction. In addition, it is shown that the consideration of wind directions is important to evaluate safety of railway vehicles under strong wind.