338 鉄道車両の走行振動特性に関する研究 : 第2報,車輪踏面の微小凹凸による動特性の改善

概要

論文の詳細を見る
In this paper, we proposed a method to introduce a fine unevenness on a part of a wheel tread in order to improve a curving performance without decreasing a hunting stability of railway vehicle, and verified a validity of this proposed method by applying a numerical analysis. Although a rolling radius difference of wheel tread with fine unevenness is the same as those without fine unevenness, a contact patch near the side other than the flange are different. When a railway vehicles run into a curved section, a contact point of inner wheel/rail shifts to the side other than the flange. At this time, if the creep coefficient of an inner rail side becomes small, the lateral force of inner and outer rail can become small, and thus the vehicle can pass the curve more smoothly. We showed that especially the wheel tread with fine unevenness has a large reduction effect of outer lateral force and derailment coefficient in cases where vehicles run on a small radius curved section with a large cant at a low speed by numerical analysis.
2011-09-05