Experimental tools for railway crossing condition monitoring (crossing condition monitoring tools)

MBS Vehicle–Crossing Model for Crossing Structural Health Monitoring

“…Based on the significant difference (increase) between the measured and the simulated crossing accelerations (in the designed condition), it can be concluded that the monitored crossing was in a highly degraded condition. This conclusion was in agreement with the experimental results of a 1:15 crossing presented in [13], wherein the significant increase (68%) in the observed measured acceleration was correlated with the visible damage of the crossing rail. was much lower than the mean value of the measured impact acceleration (216 g) shown in Figure 21a.…”

“…The narrowed transition region with a shift farther from the TP can indicate a degraded crossing rail geometry. Such a changing pattern is in agreement with the development of the fatigue area that was observed in the previous study of a 1:15 facing crossing in [13]. meaning that the rail degradation extended out of the transition region.…”

“…The application of the MBS model in the condition monitoring of the 1:9 trailing crossing further confirmed that the condition indicators (proposed based on 1:15 facing crossing in the previous study [13]) are applicable for different types of crossings (e.g., angle, traffic direction, etc. ), which provides a better opportunity for the promotion of the condition monitoring system.…”

“…In the crossing condition monitoring tool developed in [13], the condition assessment was made based on the changes in the dynamic performance indicators during the monitored period. In some cases, when the monitoring has to be performed on an already operating (not newly installed) crossing, its condition stage at that moment is difficult to determine, especially for a new type of crossing for which no monitored history is available.…”

“…In recent years, the dynamic performance of railway crossings has drawn much attention and several studies on the wheel-crossing interaction and the related problems have been performed. These studies consist of both experimental [6][7][8][9][10][11][12][13][14][15][16] and numerical approaches [1][2][3][4]. The experimental studies can provide more realistic results than the numerical ones but are also more expensive and time-consuming.…”