Citation

Liu D, Tomasini GM, Cheli F, Zhong M, Zhang L, Lu Z. Veh. Syst. Dyn. 2022; 60(2): 433-453.

Copyright

(Copyright © 2022, Informa - Taylor and Francis Group)

DOI

10.1080/00423114.2020.1817508

PMID

unavailable

Abstract

Understanding the relationship between car-body vibration and train aerodynamic forces is very important for developing a reasonable operation plan when the train passes through the complex terrain under strong wind conditions. In this study, car-body vibration under strong wind conditions was initially investigated with a full-scale test. Then the train aerodynamic forces for different rotation configurations with a train speed of 250 km/h and a wind speed of 25 m/s were further studied using a Computational Fluid Dynamics simulation. The results revealed that the car-body vibration was primarily a low-frequency and large-amplitude rolling and transverse coupling motion in windy conditions, and the roll angle of the car-body with respect to the bogie frame was greater than that of the bogie frame with respect to the track. The train aerodynamic force coefficients are sensitive to the car-body rolling motion in windy conditions. When the car-body rolling from the windward side to the leeward side, the significant reduction in the negative pressure at the bottom of the car-body was the dominant reason for the train lift force increase, and the effect of the aerodynamic force change caused by car-body rolling on the train overturning risk was not significant.

Language: en

Keywords

aerodynamic forces; car-body rolling; crosswind; Full-scale test; high-speed train; overturning risk