A Practical Use of Axlebox Acceleration to Control the Short-wave Track Irregularities on Shinkansen

Yoichi SUNAGA, Torasaburo IDE, Minoru KANAO
It becomes much more important to control wheel load fluctuation and rolling noise caused by rail surface roughness or unequality of supporting system in ballasted track to establish a repairing system on Shinkansen. Track Geometory Car, however, which is now working for daily maintenance utilizing levelling defect as the index, can't detect such short-wave track irregularities. Taking axlebox acceleration as a simple diagnostic index with which to watch dynamic track conditions, the relation between axlebox acceleration and wheel load has ben analysed statistically. This paper describes a method to identify the cause of wheel load fluctuation by analyzing axlebox acceleration considering its typical frequency, and presents the future image of a system to cotrol and to repair the irregularities.