2021 年 87 巻 902 号 p. 21-00097
To predict the wheel/rail profile wear theoretically with dynamic model of the vehicle-track systems, the wear coefficient is necessary and these parameters are generally derived from laboratory tests, such as twin disk test or a pin-on-disk test. Experimental studies are very useful because the parameters that affect wear development are controlled and also the effects of the parameters on wear development could be evaluated with physical meanings. However, it is not sure that the obtained wear coefficient is applicable to the practical systems or not, because the environmental conditions in the indoor laboratory differ from the actual ones. In this study, a novel method for deriving a macroscopic wear coefficient that takes into account various conditions in the field is proposed and analyzed its effectiveness. In the case of a railway system with vehicles of the same type run on the dedicated track with the same operation pattern such as the Tokaido-Shinkansen, it considers that the rail wear at a specific position is a result of reflecting almost the same contact conditions. Therefore, the method proposed in this study is considered to be effective. The wear coefficient derived from this method are compared to those of the previous studies.
