An improved algorithm for fluid-structure interaction of high-speed trains under crosswind

查看全文 作　　者：Tian LI Jiye ZHANG Weihua [1]ZHANG

机构地区：[1]Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China

出　　处：《Journal of Modern Transportation》索引2011年第19卷第2期,共7页

基　　金：supported by the National Natural Science Foundations of China(Nos.50821063 and 50823004);973 Program(No.2007CB714701);the Fundamental Research Funds for the Central Universities(No.2010XS34) 摘　　要：Based on the train-track coupling dynamics and high-speed train aerodynamics,this paper deals with an improved algorithm for fluid-structure interaction of high-speed trains.In the algorithm,the data communication between fluid solver and structure solver is avoided by inserting the program of train-track coupling dynamics into fluid dynamics program,and the relaxation factor concerning the load boundary of the fluid-structure interface is introduced to improve the fluctuation and convergence of aerodynamic forces.With this method,the fluid-structure dynamics of a highspeed train are simulated under the condition that the velocity of crosswind is 13.8 m/s and the train speed is 350 km/h.When the relaxation factor equals 0.5,the fluctuation of aerodynamic forces is lower and its convergence is faster than in other cases.The side force and lateral displacement of the head train are compared between off-line simulation and co-simulation.Simulation results show that the fluid-structure interaction has a significant influence on the aerodynamics and attitude of the head train under crosswind conditions.In addition,the security indexes of the head train worsen after the fluid-structure interaction calculation.Therefore,the fluid-structure interaction calculation is necessary for high-speed trains. 关键词：流体结构相互作用高速列车改进算法侧风列车空气动力学列车运行速度耦合动力学动力学模拟

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An improved algorithm for fluid-structure interaction of high-speed trains under crosswind

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