2306 実測踏面の表面形状が及ぼす車輪・レール間の接触領域(OS4-1 接触問題とトライボロジ(その2),OS4 接触問題とトライボロジ,オーガナイズド・セッション)

概要

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Up to now, the contact area between wheel and rails has been mainly calculated by assuming a wheel profile and a rail section shape as a design shape, and also by assuming the contact area which is not an ellipse as an equivalent ellipse. On the other hand, we thought that the contact area between actual wheel and rails differs from theoretical shape if it is calculated strictly. In this paper, the contact area between actual wheel and rails was strictly calculated by a numerical analysis, and the numerical analysis was verified by the photoelasticity experiment which uses an acrylics model. Furthermore, the creep coefficient was estimated using the contact area calculated strictly. As a result, the actual contact area between wheel and rails differed from the one calculated theoretically, and it was found that a creep coefficient might also be smaller as compared with the value theoretically calculated from the design shape.
2008-12-09