气动载荷对高速列车车体疲劳强度的影响  

Influence of Aerodynamci Load on Fatigue Strength of High-Speed Trian Carbody

作　　者：宋烨[1] 邬平波[1] 贾璐[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《计算机仿真》2015年第2期194-199,共6页Computer Simulation

基　　金："12.5"国家科技支撑计划(2011BAG10B01);机车车辆基础理论及标准研究-动车组铝合金车体结构疲劳强度设计与试验研究(2014J012-C)

摘　　要：随着列车运行速度的提高,气动载荷对强度的影响越来越显著。为加强列车气动载荷强度,根据高速列车在线路运行实际情况设置了四种气动载荷工况:明线会车,隧道通过,隧道会车和侧风。利用空气动力学原理计算得到四种气动载荷工况的数值,将得到的数值施加到高速列车车体有限元模型上,进行气动载荷的静强度和瞬态响应分析。计算分析结果表明,四种工况下的静强度结果都小于车体材料的允许用的应力,最大位移变形均发生在车体底部;利用Fluent软件仿真获得列车在空旷地带以380km/h速度交会的气动载荷时间历程,接着在ANSYS软件中对车体完成气动载荷瞬态响应分析,得到气动载荷对车体结构强度的影响,为车体强度优化设计提供了参考。With the improvement of train speed, the aerodynamic load has more and more significant effect on its strength. According to the actual circumstance of high - speed train in line operation, we set up four aerodynamic load cases： open wire passing, single train passing through tunnel, two trains passing by in tunnel and cross wind. Aerodynamics theories were used to get the values in four types of aerodynamic load conditions, which was applied to the numerical finite element model of the car body of high - speed train. Then carry out the analyses of static strength of aerodynamic load and transient response with the finite element model. The calculation data show that all static strength results under the four working conditions are less than the allowable stress of car body materials, the maximal displacement deformation occurres in the bottom of the car body. At the end, the train aerodynamic load time history at the speed of 380km/h in the open field was obtained by using software Fluent. The aerodynamic load transient a- nalysis of car body was completed with the software AYSYS, and the effect of aerodynamic load on car body structure strength was found out.

关 键 词：高速列车 车体 气动载荷 静强度 瞬态响应分析 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]