軌条輪上を走行する輪軸の摩耗特性解析

抄録

The dynamic behavior of railway vehicle is often tested by roller rig equipment and this test is very useful. However, it is known that contact condition on roller rig is different from the case that wheels run on rail. Wear test using roller rig equipment is also conducted and very few studies have studied on the effect of these difference on wear. To understand the wear phenomenon on roller rig strictly, it is necessary to grasp influence of difference in dynamic behavior on wear characteristics. In this paper, from a view point of multi body dynamics, wheelset / roller rig analysis model is constructed in consideration of the 3 dimensional contact geometry between wheel and rail. By conducting numerical analysis, differences of contact condition between the case wheel runs on rail and the case wheels runs on roller rig are compared and examined. As a result, when the wheelset has a yaw angle on roller rig, the wear depth on roller rig increases compared to the wear depth on rail because the longitudinal creepage increases and normal contact pressure also increase due to the decrease in the size of contact patch.