フィールドデータに基づく鉄道車両の転覆限界風速に関する検証（車体断面形状の影響）

概要

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For the clarification of the overturning behavior of railway vehicle exposed to strong cross wind, several experiments were done to study the effect of wind velocity and wind direction on the wheel unloading ratio. In this paper, the results of the experiment at a line in the Kanto region are described. In this line, strong wind is often observed, and various types of train are operated. To get useful knowledge about the improvement of the critical wind speed of vehicle overturning, data were analyzed in terms of the vehicle cross-sectional shape. Results of the experiment show that vehicle specifications, such as a car weight, or a bogie suspension are little effective for overturning, if there are no difference about the cross-sectional shape. Analyzed results of the experiment also show that depending on the cross-sectional shape, the behavior of wheel unloading ratio by strong wind is different. These results suggest the possibility of the superiority of round shape roof for improving the performance against overturning.