Riding comfort and operating safety of high-speed maglev trains with an operating speed of 600 km/h are prone to be potentially threatened under strong windy circumstances, and the countermeasures upon which are essential. In this study, we firstly performed an advanced aerodynamics model, which takes the high-speed maglev train, viaduct, and wind-break wall into account; then, we extended a fully nonlinear high-speed maglev train–track interaction model, in which the involved aerodynamic loads are obtained from the CFD-based calculations. Wind-induced non-steady performances of high-speed maglev train subjected to different crosswind conditions and the wind-break wall are examined using this integrated methodology. The numerical results state that the aerodynamic loads experienced by the high-speed maglev train are substantially reduced during traversing the wind-break section, with the most pronounced effect observed on the head car. Consequently, the implementation of the wind-break wall effectively suppresses wind-induced vibrations and lateral offset of the high-speed maglev train, thereby stabilizing the electromagnetic guidance and levitation gaps. Noticeably, the low-frequency unstable behaviors of maglev carbody are induced when the strong aerodynamic loads are applied, which are particularly considerable when maglev train travels past the boundaries of wind-break wall and sharply changing airflow field structures are induced. This study provides an insight into improving the wind-induced dynamic performance and ensuring the safe operation of high-speed maglev trains under the strong crosswind conditions through the implementation of scientific countermeasures.
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Funding
National Natural Science Foundation of China(52202426)
Research Grants Council of the Hong Kong Special Administrative Region(15205723)
Department of Education of Hebei Province(BJK2024052)
RIGHTS & PERMISSIONS
The Author(s)
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