Abstract
The research work aims to further the understanding of the risk of derailment due to unevenly loaded container wagons travelling over twisted track. The outputs of the work will contribute towards addressing the recommendations made by Rail Accident Investigation Branch (RAIB) following the Camden Road derailment.
A wide number of load cases have been simulated on vehicle models representative of four 'Types' of intermodal freight wagon. The load cases include a combination of longitudinal and lateral imbalances which cover the range of vehicle imbalances foreseeable in service. The simulations addressed the performance of each vehicle type and load combinations with respect to the resistance to wheel unloading, bogie rotational resistance and resistance to flange climb derailment.
Detailed assessment of the simulation outputs was undertaken to establish correlations between the loading conditions and key derailment metrics, with the aim of:
1 Improving the understanding of the extent of the margin of safety which results from the GMRT2141 assessment of wheel unloading, bogie rotational resistance and resistance to flange climb derailment on twisted track.
2 Improving the understanding of the effects of uneven loading on the propensity to derailment on twisted track under a range of scenarios.
3 Investigate whether an additional test is required in GMRT2141 to quantify the performance of container carrying vehicles with offset load on twisted track (and if so, what alternative limits and input conditions should be applied).
A wide number of load cases have been simulated on vehicle models representative of four 'Types' of intermodal freight wagon. The load cases include a combination of longitudinal and lateral imbalances which cover the range of vehicle imbalances foreseeable in service. The simulations addressed the performance of each vehicle type and load combinations with respect to the resistance to wheel unloading, bogie rotational resistance and resistance to flange climb derailment.
Detailed assessment of the simulation outputs was undertaken to establish correlations between the loading conditions and key derailment metrics, with the aim of:
1 Improving the understanding of the extent of the margin of safety which results from the GMRT2141 assessment of wheel unloading, bogie rotational resistance and resistance to flange climb derailment on twisted track.
2 Improving the understanding of the effects of uneven loading on the propensity to derailment on twisted track under a range of scenarios.
3 Investigate whether an additional test is required in GMRT2141 to quantify the performance of container carrying vehicles with offset load on twisted track (and if so, what alternative limits and input conditions should be applied).
| Original language | English |
|---|---|
| Publisher | Rail Safety and Standards Board |
| Commissioning body | Rail Safety and Standards Board |
| Number of pages | 79 |
| Publication status | Published - 1 Apr 2018 |