Study on the Influence of the Aerodynamic Load on the Carbody Strength of High-speed Train
With the increase of running speed of trains,the influence of the aerodynamic load on the carbody strength is more and more remarkable.Taking the carbody of an EMU for the object of study,this article firstly establishes the finite element model of carbody with the finite element analysis software,then according to the data of pressure wave during the meeting of trains on an open track simulated by the model,it adopts the time integration method to convert the transient pressure at the measurement points on carbody into the aerodynamic load on the entire surface of side wall,and sequentially applies the load in multiple working conditions to simulate the entire meeting process,and finally chooses the"points of concern"on the carbody,compares its equivalent stress values before and after application of the aerodynamic load and analyzes and calculate the influence of the aerodynamic load on the carbody strength.The test result shows that the aerodynamic load has a larger influence on the carbody strength at door corners,window corners and roof-mounted equipment,and the maximum influence rate on the strength is up to 37.3%appearing at the corners of the third window.During the evaluation of the carbody strength,it's quite necessary to consider the aerodynamic load and by using the time integration,the transient pressure wave can be converted to simulate the aerodynamic load during the meeting of trains in multiple working conditions.
high-speed trainaerodynamic loadloading modecarbody strengthfinite element model of carbody
NETL
NSTL
万方数据
维普
