An Analytical Method for Train Dynamic Behavior on Long Steep Grades of High-Speed Railway

被引：0

作者：

Hu Y. ^{[1
]}

Ling L. ^{[1
]}

Wang K. ^{[1
]}

机构：

[1] State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu

来源：

Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2022年 / 57卷 / 02期

关键词：

Dynamic analysis; High-speed railway; High-speed train; Long steep grades; Numerical model;

D O I：

10.3969/j.issn.0258-2724.20210097

中图分类号：

学科分类号：

摘要：

The coupled vibration of vehicle and track has a significant effect on the traction and braking effectiveness of trains when they pass through long steep grades. A vehicle-track coupled dynamics model considering train traction/braking behavior and the horizontal/vertical profile of the track is formulated, which is applied to study the dynamic behavior of a train passing through long steep grades. The proposed numerical model is validated by experimental data, which is also validated by comparing with the traditional calculation method. The proposed model is then used to evaluate the running capability of a high-speed train on the steep grades of Xi'an−Chengdu high-speed railway. The result shows that the proposed three-dimensional (3D) method can predict the influences of steep grades on the speed variation and dynamic performances of the trains. Traditional one-dimensional (1D) model underestimates the speed reduction value of the trains travelling on steep grades. The estimated value of speed reduction calculated by 1D method was around 5% less for every 10 kilometers than that calculated by 3D method. A serious deceleration phenomenon occurs when the CRH3A train running through the long steep grades of Xi'an−Chengdu high-speed railway. When the traction power is increased by 50%, the amount of sections where the reduction of speed over 20% is reduced by 7, and the total running time of the trains is 13% fewer. The trains with higher power traction should be adopted to increase the operational efficiency and enhance curving performance when passing through Xi'an−Chengdu high-speed railway. Copyright ©2022 JOURNAL OF SOUTHWEST JIAOTONG UNIVERSITY. All rights reserved.

引用

页码：277 / 285

页数：8

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