横風を受けた鉄道車両の挙動に関する動的解析モデルの構築および検証

抄録

It is very important to be able to estimate the critical wind speed of overturning precisely, because railway vehicles are becoming lighter and increasing running speed, which lead to conditions disadvantageous to prevention of railway accidents involving overturning of the vehicle by strong crosswind. Therefore, evaluation of the critical wind speed with consideration on the effect of dynamic behavior of the vehicle is required, that is, the difference between the static analysis and the dynamic analysis is needed to be clarified quantitatively. Thus, in order to analyze the dynamic behavior of the vehicle subjected to crosswind, we constructed a dynamic analysis model which was developed based on the static analysis model, and examined the effect of the frequency of the crosswind on the dynamic behavior of the vehicle. Further, in order to verify the validity of the dynamic simulation program prepared by using the dynamic analysis model, we conducted a full scale experiment applying lateral force to the vehicle dynamically. As a result, it has been verified that the dynamic simulation program is valid for evaluating the wheel load variation of the vehicle which is subjected to crosswind. Consequently, the effect of the frequency of crosswind on the bahavior of the vehicle has been clarified, the critical wind speed of overturning has been evaluated more precisely, and also the difference between the static analysis and the dynamic analysis has been evaluated quantitatively.