Analysis of impact of wheel slip on longitudinal impulse of a 20 000-ton heavy-haul train
In response to the longitudinal impulse issue caused by wheel slip under low-adhesion contact conditions, this paper established a vertical-longitudinal coupled dynamics model for a 20,000-ton heavy-haul train in a '1+1' formation. A comparative analysis was conducted to examine the impact...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Drive for Locomotives
2024-05-01
|
| Series: | 机车电传动 |
| Subjects: | |
| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128X.2024.01.241 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | In response to the longitudinal impulse issue caused by wheel slip under low-adhesion contact conditions, this paper established a vertical-longitudinal coupled dynamics model for a 20,000-ton heavy-haul train in a '1+1' formation. A comparative analysis was conducted to examine the impact of different wheel/rail contact states on the longitudinal impulse of the 20,000-ton train under electric braking conditions. The impact of wheel slip position and electric braking force loads on the longitudinal impulse was calculated separately. The results indicate that under electric braking operation, wheel slip was detected for the train under wet, oily and icy contact conditions when the train applies 100% electric braking force. In contrast, under 25%~75% electric braking conditions, wheel slip was only detected when the train under icy contact conditions. Wheel slip led to fluctuations in the coupler forces, particularly when wheel slip occurred in the middle locomotive, causing significant fluctuations in the coupler forces at the front, middle, and rear of the middle locomotive and increasing the coupler force at the front of the middle locomotive, thereby seriously affecting the smooth operation of the train. As the braking force decreased, the impact of wheel slip on the maximum coupler force reduced significantly under low-adhesion contact conditions. |
|---|---|
| ISSN: | 1000-128X |