基于Fluent与Simpack的高速列车流固耦合联合仿真

基于列车系统动力学和高速列车空气动力学建立了高速列车流固耦合联合仿真计算方法。利用Fluent和Simpack分别计算高速列车气动特性和气动作用下的高速列车动力学性能,通过实时传递气动参数和姿态参数,实现高速列车流固耦合的联合仿真。利用建立的流固耦合方法研究了横风速度为10．7m／s时高速列车以350km／h速度运行时的流固耦合动力学行为。比较了离线仿真和联合仿真两种方法下列车气动力与姿态、安全性和舒适性指标的差异。研究表明,列车一气流的流固耦合效应对头车气动力和姿态的影响显著,头车安全性指标有所恶化。

Co-simulation on fluid-structure interaction of high-speed train based on Fluent and Simpack

A co-simulation method of a high-speed train fluid-structure interaction is presented based on the vehicle system dynamics and high-speed train aerodynamics.The high-speed train aerodynamics and dynamics were calculated by Fluent and Simpack respectively,the co-simulation was achieved by passing the aerodynamic parameters and attitude parameters in time.With this method,the fluid-structure dynamics of a high-speed train are simulated under the case that the velocity of crosswind is 10.7 m/s and the running speed of train is 350 km/h.The aerodynamics,attitude,safety and comfortable indexes of train are compared under the off-line simulation and the co-simulation.Considering the fluid-structure interaction,results show that there has significant influence on the head aerodynamics and attitude.Besides,the safety indexes of head are worse.