低速域におけるのり上がり脱線現象解明の一研究 : 第4報,のり上がり脱線時におけるレール・車輪間の摩擦係数の測定方法とその結果

概要

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Under the critical condition of a wheel climb derailment, the friction coefficient on the contact point position between a wheel flange and a rail is said to seriously affect on the occurrence of the derailment. However, the site of the contact point position is so variously and so complicatedly transferred on the rail side according to the rotation of the wheel set that it is said to be impossible to quantitatively and exactly evaluate the coefficient. At the critical derailment condition, the relation between the friction coefficient and the wheel climb derailment coefficient is shown by the Nadal's equation, and the critical conditions can identify though the investigation into the difference between the theoretically calculated wheel climb-up value and the practically measured one. Employing a model truck and a model track, experiments were done to investigate the friction coefficient using the above mentioned method. As the result of experiments, it was found that the friction coefficient on a dry rail was nearly equivalent to the adhesion coefficient.
社団法人日本機械学会の論文
2007-08-25