Indices of train running quality at beam ends with BEJs and REJs
| Train running quality | Threshold value | Train running quality | Threshold value | |
|---|---|---|---|---|
| Derailment coefficient Q/P | 0.8 | Train body vertical acceleration az/m/s2 (In-service train load + road traffic load + temperature + lateral wind) | 1.5 | |
| Wheel load reduction rate ΔP/P | 0.6 | Train body lateral acceleration ay/m/s2 ((In-service train load + road traffic load + temperature + lateral wind) | 1.2 | |
| Wheelset lateral force Q/kN | 10 + P0/3 | Sperling index W | Excellent | W ≤ 2.5 |
| Train body vertical acceleration az/m/s2 (In-service train load + temperature) | 1.3 | Good | 2.50＜W ≤ 2.75 | |
| Train body lateral acceleration ay/m/s2 (In-service train load + temperature) | 1.0 | Satisfactory | 2.75＜W ≤ 3.00 | |
| Train running quality | Threshold value | Train running quality | Threshold value | |
|---|---|---|---|---|
| Derailment coefficient Q/P | 0.8 | Train body vertical acceleration az/m/s2 (In-service train load + road traffic load + temperature + lateral wind) | 1.5 | |
| Wheel load reduction rate ΔP/P | 0.6 | Train body lateral acceleration ay/m/s2 ((In-service train load + road traffic load + temperature + lateral wind) | 1.2 | |
| Wheelset lateral force Q/kN | 10 + P0/3 | Sperling index W | Excellent | W ≤ 2.5 |
| Train body vertical acceleration az/m/s2 (In-service train load + temperature) | 1.3 | Good | 2.50＜W ≤ 2.75 | |
| Train body lateral acceleration ay/m/s2 (In-service train load + temperature) | 1.0 | Satisfactory | 2.75＜W ≤ 3.00 | |
Note(s): P0 refers to static axle load
Source(s): Author's own work
Sharing content requires targeting cookies to be enabled. Please update your cookie preferences to use this feature.