Critical wind speed can play an important guiding role in developing an initial train operation schedule and knowledge of it mayprevent safety risks for a train. Hence, the efficient and accurate calculation of the cr...Critical wind speed can play an important guiding role in developing an initial train operation schedule and knowledge of it mayprevent safety risks for a train. Hence, the efficient and accurate calculation of the critical wind speeds of trains is critical. Thisstudy addresses this topic and focuses on the influence of different methods on the calculation of the critical wind speed. The resultreveals that the five-mass and three-mass methods can both be used to determine the critical wind speed of a train more quicklywith acceptable accuracy, but these two methods overestimate the crosswind safety risk of the train.With the increase of the train’soperating speed, the nonlinearity of the vehicle system is further enhanced. In particular, the influence of the rollingmotion betweenthe car body and the bogie is more prominent, and the results of the five-mass method and the multi-body simulation method tendto be the closest. Last but not least, the damping parameters and inertial forces ignored by the quasi-static method will effectivelyreduce the wind forces transmitted to the track, resulting in a smaller overturning coefficient and higher critical wind speed.展开更多
基金the China Na-tional Postdoctoral Program for Innovative Talents(Grant No.BX2021379).
文摘Critical wind speed can play an important guiding role in developing an initial train operation schedule and knowledge of it mayprevent safety risks for a train. Hence, the efficient and accurate calculation of the critical wind speeds of trains is critical. Thisstudy addresses this topic and focuses on the influence of different methods on the calculation of the critical wind speed. The resultreveals that the five-mass and three-mass methods can both be used to determine the critical wind speed of a train more quicklywith acceptable accuracy, but these two methods overestimate the crosswind safety risk of the train.With the increase of the train’soperating speed, the nonlinearity of the vehicle system is further enhanced. In particular, the influence of the rollingmotion betweenthe car body and the bogie is more prominent, and the results of the five-mass method and the multi-body simulation method tendto be the closest. Last but not least, the damping parameters and inertial forces ignored by the quasi-static method will effectivelyreduce the wind forces transmitted to the track, resulting in a smaller overturning coefficient and higher critical wind speed.
