Dynamic response of high-speed train-track-bridge coupled system under combined wind and snow

Abstract

The dynamic response of high-speed trains under meteorological hazards concerns operation safety and serviceability. This paper investigates the dynamic response of high-speed train-track-bridge coupled system subject to combined wind and snow. A numerical model integrating a computational fluid dynamics model and a multi-body dynamics model was established to predict the dynamic response of the couple system. The computational fluid dynamics model was used to analyze the aerodynamic loads applied to the coupled systems. The multi-body dynamics model was used to analyze the dynamic response of the coupled system under the aerodynamic loads. The effects of train speed, wind speed, and snow depth on the dynamic response were evaluated. A law was formulated to specify the speed limits for safe operation of high-speed trains. The results showed that combining wind and snow aggravated the dynamic response of high-speed trains via altering the aerodynamic loads applied to the coupled system. This research will promote practical operation and management of high-speed trains.

Keywords:

• Dynamic analysis
• hazards
• railroad bridges
• railroad engineering
• wind loading & aerodynamics

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This research was funded by the National Natural Science Foundation of China [grant numbers 52172374 and 51878563], Project of State Key Laboratory of High-speed Railway Track Technology Open Fund of China [grant number 2021YJ058], and Systematic Major Project of Science and Technology Research and Development Program of China National Railway Group Corporation [grant number P2019T001].