TY - JOUR
T1 - The effect of moving train on the aerodynamic performances of train-bridge system with a crosswind
AU - Yao, Zhiyong
AU - Zhang, Nan
AU - Chen, Xinzhong
AU - Zhang, Cheng
AU - Xia, He
AU - Li, Xiaozhen
N1 - Funding Information:
This work was accomplished by the supports of the Fundamental Research Funds for the Central Universities [grant number 2017YJS150]; the National Natural Science Foundation of China [grant number 51720105005], the 111 Project [grant number B13002] and the program of China Scholarships Council [grant number 201807090042].
Publisher Copyright:
© 2020, © 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
PY - 2020/1/1
Y1 - 2020/1/1
N2 - Some aerodynamic results about the effect of moving train on the aerodynamics of train-bridge system in crosswinds are introduced using a computational fluid dynamics (CFD) method. In the simulation, a new overset mesh approach is applied to present the motion of trains, and the results are compared with that of the scaled wind tunnel experiment to validate the accuracy of the mesh and algorithm. Besides, the aerodynamic characteristics associated with the train and bridge are discussed for a range of resultant yaw angles. It is found that the resultant yaw angle is significantly important for the aerodynamic performances of trains, and the aerodynamic interaction on the nose of head-car can affect the flow features around train-bridge system to produce larger aerodynamic loads on the head-car. Furthermore, a new fitting formula for some resultant yaw angles is proposed to predict the aerodynamic forces on trains. Finally, the time-varying forces on the bridge are presented and a sudden change of aerodynamic loads is also observed due to the effect of moving train. The variation magnitude of forces depends on the train speed, and the mean value of forces is only determined by the natural wind velocity.
AB - Some aerodynamic results about the effect of moving train on the aerodynamics of train-bridge system in crosswinds are introduced using a computational fluid dynamics (CFD) method. In the simulation, a new overset mesh approach is applied to present the motion of trains, and the results are compared with that of the scaled wind tunnel experiment to validate the accuracy of the mesh and algorithm. Besides, the aerodynamic characteristics associated with the train and bridge are discussed for a range of resultant yaw angles. It is found that the resultant yaw angle is significantly important for the aerodynamic performances of trains, and the aerodynamic interaction on the nose of head-car can affect the flow features around train-bridge system to produce larger aerodynamic loads on the head-car. Furthermore, a new fitting formula for some resultant yaw angles is proposed to predict the aerodynamic forces on trains. Finally, the time-varying forces on the bridge are presented and a sudden change of aerodynamic loads is also observed due to the effect of moving train. The variation magnitude of forces depends on the train speed, and the mean value of forces is only determined by the natural wind velocity.
KW - CFD
KW - Moving train
KW - aerodynamic characteristics
KW - crosswinds
KW - overset mesh
KW - truss bridge
UR - http://www.scopus.com/inward/record.url?scp=85077338531&partnerID=8YFLogxK
U2 - 10.1080/19942060.2019.1704886
DO - 10.1080/19942060.2019.1704886
M3 - Review article
AN - SCOPUS:85077338531
VL - 14
SP - 222
EP - 235
JO - Engineering Applications of Computational Fluid Mechanics
JF - Engineering Applications of Computational Fluid Mechanics
SN - 1994-2060
IS - 1
ER -