Sensitivity analysis of factors influencing the curve negotiation performance of hot metal train
This paper investigates the operational safety of 6-car hot metal trains negotiating S-shaped small-radius curves. Based on Simpack software, a dynamic model was established to represent a train formation consisting of 1 locomotive and 6 hot metal cars. Comparative analyses were conducted to examine...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Drive for Locomotives
2024-11-01
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| Series: | 机车电传动 |
| Subjects: | |
| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128X.2024.06.011 |
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| Summary: | This paper investigates the operational safety of 6-car hot metal trains negotiating S-shaped small-radius curves. Based on Simpack software, a dynamic model was established to represent a train formation consisting of 1 locomotive and 6 hot metal cars. Comparative analyses were conducted to examine the influence of track parameters, including track irregularities, curve radii, curve elevations, intermediate straight line lengths, and gauge widening, as well as running speeds on the derailment coefficient and wheel load reduction rate of hot metal trains negotiating S-shaped small-radius curves. The optimal Latin hypercube sampling (OLHS) method was employed to randomly sample the main influencing factors: track irregularities, curve radii, curve elevations, and running speeds. Based on the response surface method, relationships were mapped between operational safety evaluation indexes and each parameter. A sensitivity analysis of factors affecting the performance of hot metal trains negotiating curves was carried out by using the gradient algorithm. The results show that, under 26 different operating conditions, the derailment coefficient of the 6 hot metal cars exhibits a consistent trend with the wheel load reduction rate, with the maximum derailment coefficient observed for the first car being most significant. Track irregularities have the greatest influence on the safety of train curve operation, followed by curve radii and curve superelevations, while running speeds exhibit little influence. |
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| ISSN: | 1000-128X |