CFD Simulation of High-speed Trains: Train-induced Wind Conditions on Trackside Installations
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Abstract:
Speed is the created air flow as well as slipstream effects as the trains move. These effects can have some level of impact on fuel and energy efficiency of the train, but their other important outcome is the emergence of turbulent flows at higher speeds which can cause aerodynamic drag forces followed by noise and vibration. Thus, slipstream effects have significant importance in the design of trackside installations and necessitate unique safety measures. A high-speed train passing under a structure or object makes sudden impacts on aerodynamic forces acting on that object. So this issue needs to be considered in the design of structures and installations to be built around high-speed rails. In this study, a numerical simulation with moving mesh and k-epsilon turbulence model was carried out in FLUENT software in order to investigate the aerodynamic and the slipstream effects for a high-speed train in motion on overhead and trackside installations with the objective of preventing aerodynamics-induced damage. This simulation was conducted in two scenarios of absence and presence of aerodynamic brake on topside of the train. In the end, ABAQUS finite element software was used to determine the maximum stress exerted on objects (installations) positioned at different distances from the rail, and the results were compared with the maximum allowable stresses to determine a minimum permissible distance between installations and high-speed train.
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Journal title
volume 5 issue 1
pages 49- 62
publication date 2018-06
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