Derailment risk and dynamics of railway vehicles in curved tracks: Analysis of the effect of failed fasteners
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- 作者：Silvia Morales-Ivorra ; Julia Irene Real…
- 关键词：Railway dynamics ; Fasteners ; Derailment ; Curved track
- 刊名：Journal of Modern Transportation
- 出版年：2016
- 出版时间：March 2016
- 年：2016
- 卷：24
- 期：1
- 页码：38-47
- 全文大小：1,760 KB
- 刊物主题：Automotive Engineering; Geoengineering, Foundations, Hydraulics; Regional/Spatial Science;
- 出版者：Springer Berlin Heidelberg
- ISSN：2196-0577
文摘
The effect of the fastener’s failure in a railway track on the dynamic forces produced in the wheel-rail contact is studied using the simulation software VAMPIRE to assess the derailment risk of two different vehicles in two curves with distinct characteristics. First, a 3D-FEM model of a real track is constructed, paying special attention to fasteners, and calibrated with displacement data obtained experimentally during a train passage. This numerical model is subsequently used to determine the track vertical and lateral stiffness. This study evidences that although the track can practically lose its lateral stiffness as a consequence of the failure of 7 consecutive fasteners, the vehicle stability would not be necessarily compromised in the flawed zone. Moreover, the results reveal that the uncompensated acceleration and the distance along which the fasteners are failed play an important role in the dynamic behavior of the vehicle-track system, influencing strongly the risk of derailment.