Abstract
The running safety of high-speed trains has become a major concern of the current railway research with the rapid development of high-speed railways around the world. The basic safety requirement is to prevent the derailment. The root causes of the dynamic derailment of high-speed trains operating in severe environments are not easy to identify using the field tests or laboratory experiments. Numerical simulation using an advanced train-track interaction model is a highly efficient and low-cost approach to investigate the dynamic derailment behavior and mechanism of high-speed trains. This paper presents a three-dimensional dynamic model of a high-speed train coupled with a ballast track for dynamic derailment analysis. The model considers a train composed of multiple vehicles and the nonlinear inter-vehicle connections. The ballast track model consists of rails, fastenings, sleepers, ballasts, and roadbed, which are modeled by Euler beams, nonlinear spring-damper elements, equivalent ballast bodies, and continuous viscoelastic elements, in which the modal superposition method was used to reduce the order of the partial differential equations of Euler beams. The commonly used derailment safety assessment criteria around the world are embedded in the simulation model. The train-track model was then used to investigate the dynamic derailment responses of a high-speed train passing over a buckled track, in which the derailment mechanism and train running posture during the dynamic derailment process were analyzed in detail. The effects of train and track modelling on dynamic derailment analysis were also discussed. The numerical results indicate that the train and track modelling options have a significant effect on the dynamic derailment analysis. The inter-vehicle impacts and the track flexibility and nonlinearity should be considered in the dynamic derailment simulations.
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The project was supported by the National Basic Research Program (973) of China (2011CB711103), the National Natural Science Foundation of China (U1134202), the Program for Changjiang Scholars and Innovative Research Team in University (IRT1178 and SWJTU12ZT01), and the 2013 Cultivation Program for the Excellent Doctoral Dissertation of Southwest Jiaotong University.
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Ling, L., Xiao, XB. & Jin, XS. Development of a simulation model for dynamic derailment analysis of high-speed trains. Acta Mech Sin 30, 860–875 (2014). https://doi.org/10.1007/s10409-014-0111-0
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DOI: https://doi.org/10.1007/s10409-014-0111-0